One device for one function – I admire Anson’s unique and stable approach of developing masterpieces in every audio hardware niche… Let’s be honest, even a perfect device with limited functionality is risking to be buried down by millions of all-in-one mere consumer choices just because it is more convenient to use… DSLRs are almost out of the consumer market, as well as voice and video recorders, book readers, DAPs, etc. Most of the users would still agree that prosumer or pro-level stand-alone devices deliver much better quality but who cares if the content is made for and consumed in social networks? Personally, I regret the times when everyone tried to acquire the best shot out of 24-36 frames instead of storing thousands of useless files… That is why all Dethonray products impress me this much – they build a reference to those good old times when everything was designed for “pro”, forcing users think and progress.

Pegasus SG1 is not an exception. It is a sixth masterpiece developed by Anson and released in June 2022 that fills Bluetooth audio niche in Dethonray lineup. DTR1 DAP was the first, followed by Honey AMP. Later came one of the best bundle in portable HiRes audio world consisting of DTR1+ and Tender 1 planar IEMs and now comes the Pegasus. Here is the corresponding retrospective picture from the official Dethonray website:

All of those devices are highly rated by the reviewers and respected by both – audio “fans” and “philes”. Personally, I am using DTR1, DTR1+ and Tender 1 for a long time and can state that both DAPs and Tender IEMs still remain the ultimate audio performers with no problems in technical aspects either. Moreover, those devices had already gained some magic aura around and turned to collectibles. I still wouldn’t call Dethonray a “boutique” brand since boutique means something extravagant and limited in amount but not necessarily having high quality of the production. Opposingly, Dethonray is managing to deliver high quality of functioning along with similarly high quality of the production even despite smaller volumes compared to market mastodons. Therefore, I would rather name Dethonray as high-end brand working in the respective niche.

So, the Pegasus SG1 – what is it designed for? Here are the specs first:

As can be seen from the specs – Pegasus main and the only purpose is acting as Bluetooth receiver -> processing the incoming stream -> converting to audio signal. It incorporates various popular audio codecs, including the HiRes LDAC (24bit/96kHz). Outputs presented by both – 3.5mm SE and 4.4mm BL ports. The main feature shared across all Dethonray devices is also present in Pegasus technical design – DPPU (Desktop Plus Power Unit)：

DPPU adapts dual high-density battery customized power system, designed for High-Fidelity while ensuring separation of digital and analog power to eliminate digital circuit noise from the source, alike an enhanced DAP + Amplifier system but with a minimal path and hard soldered joints with no compromises.

There is one additional feature that is very important but rarely stated about Pegasus: the ability to change sound signature by different FW versions. It comes with “Rhapsody” FW by default and can be changed to “Serenade” FW on behalf of a user. I’ve seen such implementation once before in Tempotec / Hidizs USB DACs that really did a job of changing the sound to user preference. This is much more convenient than replacing Op-Amps or any part of the hardware but still requires some understanding and PC skills.

Link to Pegasus SG1 at AliExpress: LINK

Link to Pegasus SG1 at Amazon: LINK

Back to Pegasus SG1 description:

It comes in black box regular for all Dethonray devices. Box is stiff and perfectly does a job of securing its components. Single layer inside consisting of foamy insert with the cutout that holds Pegasus at place. Than goes the beauty – Pegasus SG1 resting there with its perfectly polished glass top cover facing outwards and tiny aluminum bezel around.

I’ve seen 4 body colors available: purple, red, black and mint and I can say that red and purple look punchy.

Dethonray logo underneath front glass panel has multicolor LED backlight that resembles the device current state.

Another beautiful element is the volume knob that combines clever design for comfortable grip with peculiar shape, appropriate color and matt finish.

Both output ports are located on the top edge. All control buttons gathered on the left edge.

Bottom edge holds type-C charging port and the additional LED indicator that duplicates front facing logo in its behavior.

Very neat, strict and beautiful design at the same time. Feels rigid and comfortable in hands. The only drawback is that placing it in a pocket with keys, phones or other stuff might leave the marks on its perfect surfaces. Jello-stickers would definitely help here.

Pegasus SG1 in operation:

Since the Pegasus is a BT receiver, first thing to do after initial charging is to connect it over Bluetooth to any audio source. Of course, the best performance can only be achieved with the sources capable of LDAC or apt-X HD codecs. Most of the recent phones, tablets and DAPs would surely support at least one. Although, Apple users would still be limited to lossy AAC codec instead due to Apple closed politics on that (devices for the professionals, I bet).

There is no multipoint feature in Pegasus, therefore – only 1 device at once. But the previously connected would be stored in BT controller memory for fast reconnection in the future.

The process of pairing is very fast, LED comes of a help to show whether Pegasus is still pairing (blinks) or has already paired (constantly lit). You would only have to choose PEGASUS SG1 under phone BT available devices and tap on connect. Most of the sources would state codec that is being used for audio transfer between the devices. In my case it is the most capable LDAC (Xiaomi Redmi Note 8Pro). Unfortunately, battery status is not being transferred from Pegasus to phone. Dethonray claims around 8 hours of continuous performance with SE and 6 hours with BL output. Real world tests proved those figures right.

Upon the connection, there are 3 buttons on Pegasus that work as expected: PLAY|PAUSE, NEXT and PREVIOUS. Buttons feel tight, no rattling. The additional two-way switch is designed to change from low to high gain depending of the headphones impedance. It is really better to stay off selecting high gain for IEMs lower than 16Ohms or it might be damaged. Volume knob has pleasing feel of tight travel and comfortable grip. It acts pretty accurately, delivering smooth volume change in both directions. Much more convenient than discrete volume buttons found in phones, USB DACs and in some DAPs that change it quite abruptly. Here you can select any desired levels, starting with the barely heard ones.

Pegasus stays stays cold during operation with only slight warming up while the battery takes charge. Type-C port is only used for charging | FW upgrades but the function of USB DAC is not available.

FW change:

As said before, this BT DAC has two different firmware versions. Rhapsody (default) is more assertive and Serenade is more calm and melodic in its signature. Changes in sound are audible but not vital. It is more about rounding some edges and slightly changing the entire timbre. Personally, I prefer Serenade version over Rhapsody for its slightly added warmth and smoothness. Phapsody is better for more aggressive and rhythmic genres.

Here is the link to FW download on Dethonray website: LINK

The process of switching to another FW is quite cumbersome but doable. Here are the steps:

The sound:

Pegasus SG1 is impressive. Sounds linear with the emphasis on mids which sound thick and pleasingly warm. Sound perception is natural and balanced. Quite hard to notice any discrepancies that would disclose its wireless connection.

Bass is well-resolved and emphasized. This bleeds into mid bass and affect the entire sound with such pleasing warm and thick strokes. Fortunately, mid bass section is still maintaining great dynamics and tightness to sound juicy. Mids stand out as the central part of the presentation and deliver voices and instruments naturally. No hisses or sibilants even with sensitive IEMs. Lows definitely have more impact on mids than treble. Slight lack of texturing due to BT connection but still feels very musical due to accurate and smooth delivery. Despite wireless connection, treble is well-extended, with no abrupt nuances. Good clarity and correct balance with other ranges without any emphasis makes treble very accurate and appealing, leaving the whole sound closer to the dark side.

Great choice of tuning for such BT DAC. Possibly the best to go away from dry and analytical approach to very musical one that also hides some imperfections.

Conclusion:

Pegasus SG1 is the best sounding Bluetooth DAC among all BT audio devices of al types I’ve tried so far. IEMs with BT lace, BT earhooks, TWS, BT ultra-portable DACs – all suffered from apparent wireless connection limitations especially noticeable on abrupt treble and limited extensions. It might be the outcome of device hardware size, design or multifunctional abilities when some are developed appropriately and some are just for show. Pegasus, on its turn, is made for one function and made perfectly: in terms of design, logics and performance. It uses the best BT codecs possible, shows no hiccups in operation and makes the sound truly appealing. Moreover, it sounds almost indistinctive to very good portable wired setup combinations. Feels like with the Pegasus SG1, going wireless is no longer a compromise either with headphones or in desktop use with active speakers or amps.

Link to Pegasus SG1 at AliExpress: LINK

Link to Pegasus SG1 at Amazon: LINK

Sennheiser, as a brand, doesn’t need our presentation. It is among the largest and oldest manufacturers of personal and professional audio products, located in Germany and existing for more than 75 years. No doubt that their professionalism allows to create the most polished used experience mixed with the highest functionality at the forefront of the progress. A bit of conservatism that stops them from releasing raw products just to overtake the competition only show brand strength and differs it from smaller, less patient and picky ones. As the result, the end customer might play with the latest technology from the smaller brands, but the will to try similar products from the industry leaders still remains.

Couple of more words about the vendor which plays and important role in this review: we are rarely dealing with the largest and the most famous audio brands due to a simple reason – its price. Most of the hundreds of IEMs and other products that has been reviewed on our website are less expensive rivals which we can or cannot recommend to others according to our expertise. There are a lot of products which became a real bargain even in comparison to matured brands. Whereas some are just a shade of what it is meant to be… For brands of the first echelon like Sennheiser, Audio-Technica, Yamaha, Beyerdynamic, JBL, etc, 99% of their products is the win, with almost no mishaps. But the price bar is much higher, in similar 99% of the cases. The only option to have a bargain here is to find the best price from trusted vendor. In case of Sennheiser and Audio-Technica (more brands would show up there soon) there is Voonaudio store that lists 100% authentical products with the best price compared to other online stores (excluding when brands provide the additional seasonal super sales/deals on Amazon or other official online shops). This finally makes us possible to test some famous products that were quite pricy before (product price + logistics). Momentum TW 3 set was provided for the review for free but considering the offer, we can finally plan some spendings on less common items like turntables, for instance.

Back to Sennheiser Momentum True Wireless 3:

Technical specs:

Most interesting features to outline in this product:

• Supports aptX and aptX Adaptive (24bit/96kHz, up to 620Kbps) Bluetooth codecs
• Active Adaptive Noise Cancelling technology with Transparency mode
• 3 mics / channel
• Smart control application for iOS and Android
• Wireless and wired charging
• IPX4 waterproof
• Multipoint support (2 devices at once)
• Great fit by exchangeable ear tips and fins

Device packaging and bundle:

Momentum arrived bit later than expected due to reasonable problems in the logistics between China and Ukraine. We were still surprised that it took only 16 days by a regular air parcel method to arrive. European hub reported that it arrived from China in 8 days, the rest was truck transportation from Germany to local hub and to its final destination afterwards.

The appearance of the product was definitely created with the intention to greet the customer with Christmas and New Year celebrations. Creativity and care stands behind the additional outer wrappage which also contains Voonaudio CEO (Samantha Lind) signature.

Thanks guys, happy New Year too!

Here is the standard Momentum True Wireless 3 box without the additional cover:

Box contains large amount of product and company information but the most important is the availability of counterfeit protection sticker that shows that it is 100% original Sennheiser TWS.

The insides are split in two vertical compartments, one holds IEMs with charging case and another stores all provided accessories.

Apart from TWS and its case, the bundle consists of:

• 4 pairs of silicone ear tips (XS, S, M, L)
• 3 pairs of fins (with slightly different shape)
• type-C to USB A charging cable
• user manual, warranty card and couple of leaflets

Can’t tell that this is the best bundle we’ve seen among all TWS that we’ve tested, but the availability of different sizes of fins and tips builds the confidence that the fit should be great.

Design, feel and fit:

As the representative of TWS IEMs, Sennheiser Momentum True Wireless 3 consists of left and right channels and charging case that plays a role of a power bank. Case is made of plastic, fully wrapped with cotton material. Sennheiser logo at the top, type-C charging port with LED indicator at front.

Top case cover holds quite tight by the large integrated magnet. No way it would open by itself. Inner IEM contacts also hold each channel in the compartment with relatively strong magnetic force that would secure it from falling out if turned up side down. Case build quality is excellent, everything is perfectly aligned and crafted.

IEMs have similarly perfect finish and crafting – made of plastic but feels rigid. Perfectly aligned parts, clear openings and neat look. Top covers consist of brand logo, couple of mics and touch sensitive panels:

4 contacts, additional mic, proximity sensor and LED indicators on the bottom.

Sound channels are covered with nylon mesh for dust protection purpose. Additionally, each ear tip has its own dust protection in a form of foamy insert. Glad to have that since the most of the problems with IEMs happen due to dust and dirt getting inside the shells.

At first we were not confident about the fit – IEMs look pretty large and feels heavy. Although, its shape together with different fins and ear tips allowed to find the most comfortable and tight sitting option that even allows to use Momentum True Wireless 3 during active workouts. Weight is not causing any inconvenience either. When fit is great you just forget about IEMs in your ears. Of course, it would not win over any custom-shaped wired IEMs, but surprisingly good and gives the additional freedom due to being wireless.

One of the most important questions – how good is the fit comparing to other types of TWS, like earbuds (certain Apple products) or IEMs with long leg (like Huawei FreeBuds 4i), for instance…. Unfortunately, it is still a question of compromise:

• Earbuds are the most comfortable for long and calm use but least secure for fitness and worst in sound quality due to lack of passive noise isolation
• IEMs like Huawei FreeBuds 4i are less secure than Momentum TW 3 during active movements and have worse sound due to lack of room inside the case but should have better voice pick up due to lower position of microphones.
• Momentum feels much more secure but heavier. It might not be as comfortable than other two through the whole day.
• As to such types of TWS as ear hooks with IEMs (FiiO UTWS 3) – best sound quality due to optional preferred IEMs but the worst fit – feels bulky and not too natural.

Apart from physical comfort and fit, there is also such very important aspect of TWS IEMs as its acoustic feel. Some people might have bad experience with wearing in-ear monitors for a long time. It really might cause a lot of discomfort, physically as well as psychologically. Constant pressure against tympanic membrane may cause dizziness, headache, nausea, etc. But we can assure you that it is not about the Sennheiser Momentum 3 – it has the necessary transparency modes among all of its features to completely remove any negative effect during the long-time wearing session.

Functions and user experience:

Momentum True Wireless 3 is quite sophisticated products that features all expected functions that should exist in modern TWS. Besides, all declared functions tailored well in its logics, which is one of the main advantages of having more expensive product from the leading brand. We would like to go over main functions to describe the implementation quality and our feedback about each one:

• Active Adaptive Noise Cancellation: can be activated in two modes (only wind noise reduction or full noise cut off), controlled with the touch on sensor panel (types of tap and channel side can be set in the app). Does really impressive job in full noise reduction mode. No audible change in sound quality but leaves most of the distracting external noises out. Active noise reduction in Huawei, Xiaomi, Apple TWS is definitely less capable (never tried Sony though, people say that it is pretty darn good as well). Of course, if using Momentum 3 only to isolate from the surroundings, without listening to anything, the effect of extra pressure would be apparent. Switching to wind noise reduction only or to transparency mode totally removes possible negative feel. In real usage scenarios, when listening to audio or speaking over the phone with ANC activated to its full potential – you would barely notice any external noises and can totally focus on the sound coming to your ears from IEMs. One note about ANC control: touch sensors on IEM housings allow only to switch between OFF and one of ANC modes (wind reduction, full), whereas the app allows to select any ANC mode in real time and to set which one would be activated with the touch.
• Transparency mode: can be activated in 2 modes (along with audio and activating pause when enabled), controlled with sensor touch (types of tap and channel side can be set in the app) or by the app. Again, app allows to select either of 3 modes (OFF, along with audio, pause the audio) and sets which of the modes would be selected apart from OFF. Similarly to ANC, does a very good job on amplifying surroundings right to your ears. Releases any type of pressure that might annoy during long wearing sessions. Of course, the best effect is when the audio is set on pause, but the incoming voices are quite audible even when the music plays (if it is not very loud). Most of the amplification applied to upper mids rather than treble or lows.
• Multipoint connection: when updated to the latest FW, Momentum 3 can be connected to 2 devices simultaneously. It would allow audio and phone calls from either device, whichever initiates it first. At the same time, we can connect to other devices and store it in TWS memory but only two of those would be active at a time. The rest would be inactive until one or both of the active two would get disconnected. New device pairing process can be initiated by tapping and holding both channels for 3 seconds. Channel LEDs flash red/blue when pairing takes place. The entire list of all stored and currently active devices is shown in the app.
• aptX and aptX Adaptive BT audio codecs: first of all, base or enhanced codec that would be used to play audio with Momentum 3 is defined by the smartphone. If it is relatively modern and supports aptX / aptX Adaptive – aptX would be selected by default with the ability to switch to aptX Adaptive from the app. The difference is mostly vital for lossless audio tracks and respective music player apps that can handle it. aptX is commonly known as 16bit/44.1KHz while aptX Adaptive is substituting more recent aptX HD and bringing 24bit/96KHz, 620Kbps stream with lower latency. Therefore, being almost similar to LDAC and UAT, aptX Adaptive the the best codec currently available for Bluetooth audio – the closest match to the full-frequency quality over the wires. Currently used codec is displayed upon connection in the app itself and under BT connection settings of a smartphone. If aptX is not available, regular codecs like SBC would be used instead.
• Separate use of channels: either left or right channel can be used independently for audio and phone calls. It takes only about a second to activate and synchronize when the second channel is taken out of the charging cradle. The difference between left and right would maintain in types of controls programmed for each one. If some side functions are programmed for the left – the right one would not activate it if you pick it instead. And vise versa. But main functions would remain the same for either one. Another way to control missing functions when using single channel – is to use the app. Both channels equipped with the proximity sensor which means that audio would be stopped or initiated when wearing it. Transparency mode would work and can be manually activated even with a single channel.

It seems that Sennheiser did a great job on developing the application for its TWS products. It is the first time in our practice when the app really helps to see what’s going on and allows to use various additional functions. Therefore, we would like to describe what it is capable of:

The initial screen allows to connect new and see the list of all Sennheiser products that has been located on this device:

First app screen shows the main functions:

• Shows cradle and active channel battery level
• Shows current connection status
• Allows to see the list of connected/paired devices
• Allows to tune and set EQ (it is possible to create own 3-way EQ profile or select one of the presets)
• Allows to run sound check and tune the sound (means running any audio and selecting different presets in special wizard which finally creates your own preferred sound profile)
• Allows to select Transparency mode and to set which one would be activated with the touch
• Allows to select ANC mode and to set which one would be activated with the touch
• Allows to create sound zones based on the location (activating functions in different GPS locations)
• Allows to set touch controls for each channel

Discover tab is for the product and interest related news feed

Settings tab:

• Allows to see and update FW version: updates take about 12-15 minutes, no matter whether earbuds are placed in or outside the case. LEDs would flash green/purple during the process until finished. Smartphone should stay in the area of BT coverage.
• High res audio mode: allows to force aptX Adaptive codec if supported by a smartphone
• Smart pause: allows to set music on pause when either one of the channels is removed
• Allows to automatically accept calls: picks up the phone if any channel is removed from the cradle
• Sets auto-power off interval when removed from ears but not placed in cradle
• Activates and deactivates tone & voice prompts
• Shows currently used BT audio codec
• Displays model name
• Allows to select app language
• Allows to select tiles (functions) that would appear on the main app screen
• Allows to perform factory reset
• Allows to send user feedback
• Lists FAQs and short help on different functions

Pretty powerful and informative application in comparison to most of the app from other vendors which are used once per quarter to check if there is an update. You would definitely use it for ANC, Transparency mode activation, EQ tuning along with FW updates or new device connections. For example, Huawei TWS app feels too heavy and slow with its smart hub and plugins. Moreover, it is not that informative. You visit it once to learn how to control TWS and never go back. Better to skip Huawei updates as well – the last one made ANC almost unusable (non-existent). We’ve already had one FW update for Momentum True Wireless 3 – its changelog was clear and promising as well as the final TWS performance became even more comfortable. We think that such consistency and wise approach from Sennheiser would remain and this is another valuable side of purchasing products from a leading brand.

Momentum True Wireless 3 audio/voice quality:

We’ve tried Momentum 3 with Xiaomi Redmi Note 8 PRO, Windows 11 E14 ThinkPad Notebook, Hidizs AP80 Pro DAP and Xiaomi Qin F2Pro. There were no problems with connecting to either one of these devices; discovery process and connection went fast. Connection keeps stable within one room and shows rare frame drops behind 1 concrete wall. For example, Huawei TWS start to loose the connection when smartphone is placed in back pocket. Nothing like this with Momentum 3 IEMs.

Voice pick up quality is great, responders say that my voice sounds naturally, clear and close to the mic. There were no problems with environmental noise during calls either. Wind noise / evenly spread noise is reduced to the point when the responder doesn’t notice it at all, only some sudden and sharp sounds might break in. Considering all that said, our worst expectation about possible bad quality of voice pick up due to physical shape of IEMs faded away.

Now, about the music: years and hundreds of tests of wired IEMs made us very sensitive and demanding in this respect. Earbuds (apart from some very rare ones like certain Smabat or Ourart models) don’t work at all even when connected with wires. Therefore, similar types of TWS definitely fall short of sound quality expectations adding BT codec problems over its physical fit problems. As to IEM-type TWS, we’ve found the direct relation between the size and shape of channel shell and its resulting sound quality. TWS IEMs with long-protruding leg (battery and mics inside this leg) and small-sized shell sound pretty similar to each other: mostly focused on middle part of the spectrum (which is logical for better voice pickup), with limited abilities on both ends. Tight speaker chamber and insecure fit cut the lows, while BT codecs (especially regular ones like SBC or AAC) severely affect treble. Momentum 3 is addressing both issues with large speaker chambers and the most enhanced BT codec so far. At the same time, more secure fit and much better passive noise isolation creates more linear AFR feel, with even spread across the entire range. Bass is present, pleasantly wide and deep, feels much closer to some regular, wired high-quality dynamic IEMs. Middle section and mid bass sounds dynamic and rich, although a little bit shallow to our liking. Better for linearity but leads to kind of congested stage. Treble is pretending to be extended and bright but still not this airy, sparkling and natural as we got used to with wires. Instrument separation is moderate, stage is pretty small. Resolution is surprisingly good for bluetooth IEMs throughout the entire range. In fact, the good thing is that in overall Momentum True Wireless 3 sound quite balanced, pretty warm and accurate. No will to take if off and switch back to wires. Which is the most important for us.

Comparing with Huawei FreeBuds 4i:

Different shape result in different sound. Huawei is not doing that good in any respect. Fit, passive noise isolation are much worse. ANC performance is not good at all with the latest FW update. Sound is focused mostly on mids.

Comparing with Xiaomi Buds 3T Pro:

Slightly better than Huawei but similar problems with ANC. Moreover, the app is not that useful – feels less consistent. Sound is close in its nature but lacks the extension at both ends as well as the balanced feel of Momentum 3.

Comparing with Divinus Ostia:

Ostia are great TWS IEMs for music. Apart that it neither features ANC, nor the transparency functions. Much less functional but pretty good for audio purpose. Sound is very close and we would say that even more accurate on treble, although not that extended on lows.

Comparing with FiiO UTWS2 + HiRes IEMs:

If to compare like this, you should understand that BT ear hooks would never be as comfortable and cannot stay for long time with you as a result. One hour is ok, but not for the whole day. At the same time, it is the best sound quality what we can get in comparison to wires. With UTWS3 we can use any of our preferred IEMs while BT hooks would work with the latest BT codecs like LDAC. What really suffers in such pair is the quality of phone calls (mics are less sensitive, ANC is not present). Moreover, we had some slight problems in synchronization between 2 channels after short periods of using single one for calls.

Conclusion:

Despite that we are still not convinced that Sennheiser Momentum True Wireless 3 IEMs can totally satisfy audiophiles, this is definitely one of the best TWS on the market. All of the declared features and functions work perfectly, assisting app is great, ANC and transparency modes are very effective, sound is linear and balanced, voice calls sound natural, fit is secure… Even touch controls and proximity sensors behave precisely. All chances that Momentum 3 would become everyday companion no matter the surroundings – loud, extreme or calm. One of our main conclusions is that the overall Momentum 3 performance clearly defines its price and demonstrates the might of Sennheiser brand. So many details are polished and so satisfying is our user experience. Great modern product.

Sennheiser Momentum True Wireless 3 was provided for the review by Voonaudio: link to the official store. Check out their prices and than try to find a better offer…

Short description about Voonaudio from their official website:

1. Voonaudio is a fully authorized and differentiated brand store to provide branded high-quality audio devices. We, as experts, promise 100% authenticity and value for everything we sell backed by our passion to share the love for music.
2. Our Vision
   · Say goodbye to tedious price comparison
   · Say goodbye to time-consuming pre-purchase research
   · Say goodbye to scams and knock-off audio gear
3. WE PROMISE👇 👇 👇
   ☑️ 100% Authenticity Guaranteed
   ☑️ Most Competitive Price Guaranteed
   ☑️ 30 Days No Reason Return
   ☑️ 1-Year Warranty Offer
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   ☑️ We Cover around 20% VAT for Europe Countries. You just pay a few %

As TWS victorious march on mass market continues, even highest audio quality focused individuals (as us) are sometimes turning their heads to see whether wireless technologies are getting closer, or to find the most convenient compromise for a regular use. Large amount of TWS options that are currently available for purchase are always divided in three segments (at least in our heads): utilitarian TWS, musical TWS and wireless buds that would never serve a purpose for an audiophile (like Apple EarPods) due to its shortcomings in physical design and lack of latest high-grade codecs. The rest of the two can draw our attention but with lots of “if”.

Currently, we have came up with the following conditions for each of two types:

Utilitarian TWS: best to be high-quality earbuds with detachable cables (Ourart ACG, etc) accompanied by high-quality Bluetooth modules (like FiiO UTWS3, etc). In this case we are getting the most of audio quality with the latest BT audio codecs, ability to detach and change earbuds, good quality of phone calls, and the last and most important – buds are not creating vacuum and don’t make you feel uncomfortable throughout the day.

Musical TWS: it should be high-quality IEMs with latest BT audio codecs, with excellent fit and ergonomics.

Now, when we have defined TWS types, we can introduce our new review topic and try to define which type it belongs to…

DIVINUS OSTIA (DVT-100) – TWS IEMs from quite new brand that has some essential peculiarities: first, it is from South Korea (R&D and QC are domestic), second – it is based on in-house DD driver and third – it is music-oriented TWS. Here is the link to official product page: LINK and here is the page to read about DIVINUS brand: LINK

OSTIA tech specs:

• IPX7 (perfectly finished housing protects product from water)
• Light weight, compact size, total weight 39.1g including charging case
• Custom designed DV1 driver (6mm DD Driver)
• Bluetooth 5.0 connection with TWS
• C-type charging port
• Wireless charging
• 20 hours of total usage time, 5 hours playtime per charging
• Voice assistant
• Touch control
• AAC/SBC codec supported
• In-ear type earphone

Official AFR:

The most interesting parts in OSTIA specs is that it has IPX7 protection and wireless charging built in to its charging cradle. Although, no charging base is included. Furthermore, the absence of HD audio codecs makes us doubt its audio performance which we would describe in the sound quality section.

DIVINUS OSTIA available for purchase here: LINK

Packaging and design:

OSTIA comes in pretty small box that contains product graphics and information. Inner part of the box is split into two parts: one holds the cradle with IEMs inside and the other contains two boxes with the accessories. The full box package consists of the following:

• OSTIA cradle
• OSTIA IEMs
• 3 pairs of silicone ear tips
• USB type C charging cable

Along with this set, we have received a set of memory foam ear tips and a set of sound filters. As we’ve understood, those two are the options and can be purchased separately. We would say that sound filters should actually be a part of the product bundle since those act as a dust protection and significantly normalize sound performance on treble… Absolutely a must for OSTIA TWS.

Both OSTIA cradle and IEMs are very compact in size and lightweight. Perhaps, the smallest cradle so far among all we’ve seen. Everything here is made of plastic with the main design element in a form of polished plate with shiny silver DIVINUS brand logo at the top/facing side. Cradle exterior is equipped with 4-segment LED charging indication, type C charging port and integrated carrying lace. Inner compartment has separate L/R IEM beds with magnetic charging pins.

Magnetic force is enough to keep IEMs at place when cradle is opened and held up side down. Despite its low weight, cradle battery capacity is enough to charge a pair of IEMs 4 times. Considering that IEMs can last for 5 hours per charge, it gives around 20 hours of playtime in total.

OSTIA IEMs shell is made of two perfectly aligned parts. Each channel is equipped with a mic under aluminum grill, channel indication, multi-color status LED, compensational opening, charging contacts and sound output nozzles. As mentioned before, nozzle opening are not protected by any means out of the box and require optional sound filters to be fitted. Shape of the nozzles is regular which makes it possible to use any common after market tips. Facing sides of each channel represent touch control sensors. All commands are listed in English user manual. Here we should state that most of the expected controls are embedded (start/stop, back/forward, pick up/hang up), except the volume. It adds some inconvenience since the volume can only be controlled from a source.

Fit:

OSTIA IEMs have good ergonomics and excellent universal fit. Nozzles are long enough, tips provided in 3 sizes and the weight is very small. No problems with the fit even during active movements. Moreover, considering that it has IPX7 protection – no worries about sweat or rainy conditions.

In use:

OSTIA cradle and IEMs takes the charge from empty to full for about 2 hours. Can be charged simultaneously. Pairing is initialized when IEMs are taken out from the cradle and there is no known source is available to connect to. Switch off happens when IEMs are placed back to its place. Each channel can be used separately or in pair. This logics works seamlessly, no problems met with Xiaomi smartphones as a source. Although, there is no multipoint connection function which means that IEMs would produce sound from only one source at a time. On the other hand, it would store multiple device in pairing memory for lighting-fast connection to any previous one.

Touch controls and voice assistance work as expected, quite smooth and reactive. The only inconvenience with that might appear when removing and fitting IEMs from you ear – accidental single touch of facing plate might occur which would result in music start/stop or call pick up/hang up.

Mics are doing a good job in phone calls. No bad response from other party during calls in office or home environment and some light noise interruptions outside.

In overall, we like how OSTIA TWS are made, feel and perform in everyday usage scenarios. FW and logics made good, no errors or flaws in the performance, fast and stable connection and seamless IEM swaps.

Sound quality in comparison…:

Due to the brand background and declared product qualities, we were expecting OSTIA to be musical enough to keep on par with IEMs with Bluetooth hooks combination or with musical TWS like TFZ X1, at least. And it appears to be somewhere in between. Bluetooth hooks like FiiO UTWS3 that support AptX codec, have dedicated amp and based on more advanced elements are several steps ahead of OSTIA in terms of sound quality, especially in retrieving textures /depth on lows and clarity / extension on treble. FiiO modules also bring more details and overall resolution over entire range and better dynamics / articulation in mid bass region. OSTIA feels more tending to show it V-shaped nature with excessive accent on treble and bass areas, lacking maturity and naturality on mids. But mind that FiiO UTWS3 were paired with such great examples of DD IEMs as Hidizs MS2, for instance. Such bundle has much higher price and much less convenient in everyday use.

If to compare to TFZ X1 – another musical TWS with very similar specs – OSTIA keeps up very good and has some significant advantages in sound and overall performance. Sound wise, OSTIA is doing a better job on lows – extension is better, bass sounds deeper and more pronounced in overall. Treble is much closer in its performance, but slightly more delicate and less abrupt and straight-forward. Mids are quite similar, shifted back in both cases and emotional due to tendency towards upper mids area.

In overall, our conclusion that the sound quality of OSTIA is quite far from the best wired DD IEMs which we’ve got used to but its performance as TWS for everyday is very good. Sound quality in such scenarios is totally enough and what is the most important – user experience is close to perfect.

One more word about optional sound filters – it is a must for OSTIA IEMs. Treble section gets quite lisping with no filters attached.

Conclusion:

The main conclusion for us is the proof that Bluetooth TWS are still a good option for general usage, but yet too young to play on wired audio IEM ground. On the other hand, OSTIA definitely belongs to TWS vanguard with the best user experience due to its stellar functional performance, excellent fit, convenient operations and good sound quality. It has the advantages in sound and logics over some more popular brands even despite being quite new to the market. Almost flawless first attempt, worth of attention for general use even on highly saturated mass-market. Audiophiles pass by, but less sophisticated listener should appreciate.

DIVINUS OSTIA available for purchase here: LINK

Since the first encounter with devices by FiiO we had a strong feeling of playing with something accomplished, well put together to the extent that missing some additional functions fade away under the tons of positive experience of working with such devices. At the first glance FiiO products doesn’t scream of its superiority in the related niche, but when digging deeper suddenly comes the understanding that there are lots of interesting functions wisely developed and perfectly integrated inside its logics. Recent FiiO UTWS3 (universal Bluetooth ear guides) with its totally revised functionality became the revelation for us for its stellar performance, now comes another Bluetooth device – BTA30 – which leaves pleasant aftertaste and becomes a part of Hi-Res setup.

FiiO BTA30 is a desktop USB DAC. Although, despite being able to accept and process audio data over USB, its main purpose and virtue is to act as Bluetooth audio transceiver. Not only it received Bluetooth audio, decodes and converts it to analog on RCA outputs but also is able to pack and send audio data over Bluetooth. Anyway, details would show up later in this article, let’s go over device specs first:

FiiO BTA30 specs:

As seen from the list above, Bluetooth part is based on mighty CSR8675 (5.0) and supports most sophisticated codecs such as aptX HD and LDAC. Not many standalone or portable devices, apart from Hi-Res audio players or expensive DAC/amps, would license SONY LDAC codec and have this feature. Moreover, in case of BTA30 it is bidirectional – those codecs are also used to pack and send audio data to other Bluetooth equipped devices. Furthermore, instead of using DAC abilities of CSR8675 chip, FiiO processes audio through AK4490 DAC, CT5302 DSP and uses OPA1662 as operational amplifier. Such architecture is far more superior than using Bluetooth chip alone which results in much more resolving and accurate sound competing with many Hi-Res DAPs.

Packaging and design:

FiiO BTA30 comes in relatively small box with outer cover and stiff inner base. Cover contains prints of the product, logos, technologies, trademarks and company contacts. Besides that, there is a counterfeit item protection sticker at the top right corner at the back.

Soft foam insert securely holds BTA30 inside, all accessories are located in a separate box underneath. Full list of items in the box:

• BTA30 with antenna
• 2 protective caps for optical ports
• 4 extra rubber legs (stickers)
• USB A – USB type C cable

What is missing in this bundle is a power adapter. Supposing that BTA30 would be commonly used as desktop Bluetooth transceiver, it would require external USB power. Since it can be powered with any source device over USB, we would recommend to use any adapter with 5V, >=1000mA output and better if it would be linear (for less amount of interference).

FiiO BTA30 design is perfectly clean and accurate. Perimeter unibody frame acts as a chassis for top glass and bottom plastic covers. Facing edge is not overloaded with the control elements, labels are neat.

Here you would find main power and Play/Pause (Pair) sensor buttons along with MODE 3 positional slider switch and smooth volume control knob. Back side is responsible for all inputs/outputs (USB type-C, separate optical IN/OUT, combined coaxial IN/OUT, Line OUT) and antenna. By the way, top glass panel is covered with protective film from the factory. Bottom cover equipped with 4 silicon legs which hide chassis screws.

Personally, we love this kind of neat design with high quality crafting of each element. Everything is accurately assembled with no gaps between main body parts. Nothing rattles and squeaks.

Device in use:

One note for the future users: since the antenna is detachable and has female SMA port, not only we can remove it, but also there is a possibility to enlarge the distance of Bluetooth reception/transmission. Stock antenna is ~2 – 2.5dB whereas most of the current home WiFi routers would use 5dB instead. Such 5dB SMA antennas for 2.4GHz would also fit this unit. Although, as a rule – never switch Bluetooth transmission mode ON when antenna is not attached. This might burn RF amplifier elements. It is better to always use this device with the antenna in place.

There are a lot of usage scenarios, thanks to the functions integrated to this outstanding device. We would point out each one:

• As desktop DAC/preamp for active speakers or home audio setup. In this case we can connect BTA30 from any audio source over USB/COAX/Optical and use Line OUT (DAC MODE).
• As wireless transport for other DAC – connecting audio source over Bluetooth and sending this data over COAX OUT/Optical OUT (BT RX MODE)
• As wireless receiver for active speakers or home audio setup – connecting audio source over Bluetooth and using Line OUT (BT RX MODE)
• As wireless transmitter for Bluetooth devices – connecting any audio source over USB/COAX/Optical and sending data over Bluetooth (BT TX MODE)
• We can even build a wireless bridge (if we have 2 BTA30 devices) – one BTA30 would be in BT TX MODE and taking data from any source over USB/COAX/Optical and the other BTA30 would be in BT RX MODE and sending data to any source over COAX/Optical or just converting and amplifying through LINE OUT.

In those scenarios which do not require source to be connected over USB – we should supply power from a separate power adapter.

Most of the operations are straight-forward. Supplying the power and pressing power ON/OFF switch at the front would indicate in device power state with a dedicated LED. Press once to switch on and hold a bit to switch off. Constant emerald – power ON. At the same time, LED above Play/Pause button would indicate other states according to the position of MODE switch and audio sampling rate. It would request pairing with fast change between GREEN and RED, active connection with single or double GREEN flashes and different other colors for sampling rate (look at the table above).

In case of USB connection, BTA30 would identify itself as FiiO BTA30 under Windows 10 environment. We haven’t found any ASIO drivers on FiiO website and this device is natively supported in modern OS. Although, the output quality in device functions are limited to 16bit/48kHz. Optical and coax inputs would process much better quality (24bit/96kHz optical and 24/192 + DSD64 DOP coaxial), pack it to or unfold it from Bluetooth data or just decode for Line OUT. So, to get the most, it is really better to use BTA30 as DAC with Optical / Coaxial inputs/outputs or Bluetooth.

In case of Bluetooth – it gets more interesting. Not only you can pair with BTA30 from any Bluetooth equipped source, but you can also use FiiO Control APP for Android/iOS and have the additional tuning and functionality. Here is the list of what this app can do:

• Change status indicator light colors / disable it
• Auto-power on function
• Select Bluetooth codecs for TX and RX modes
• Select DAC inputs
• Select between 4 LPFs
• Adjust or fix volume
• Adjust source volume
• Change channel balance
• Enable digital upsampling
• Select streaming quality of selected codec
• Show the guide
• Change device name
• Reset pairing
• Clear settings to defaults
• Power off the device

Moreover, this app works with BTA30 even if it stays in DAC MODE.

We had no problems with sound hiccups or any kind of interference with the stock antenna connected to a regular smartphone 10 meters behind 1 concrete wall. Strong reception/transmission quality that can be improved with third-party antennas. Audio lag while streaming video from a smartphone is present but not large and comfortable. What the the most important – the output power of BTA30 (3Vrms) is totally enough for active speakers to sound very loud. Many current portable Bluetooth receivers are not capable to supply enough power and active speakers would increase noise floor when trying to a amplify incoming signal to an appropriate level. Absolutely not a problem for BTA30 and this is one of the main reasons why BTA30 suits out setup.

Pairing is fast, further connections are lightning-fast. No clue about multipoint function (seems none) but BTA30 stores more than 5 different devices (which we’ve tried so far) in its memory and connects to the first discovered after enabling Bluetooth on anyone of those. No need to pair previous devices again.

Since there is a choice of TX or RX modes for Bluetooth, we cannot simultaneously receive audio from a source and send it to the end gear. Such capability is met only in some recent feature-packed DAPs.

Volume knob feels nice and smooth, has special surface finish to add some additional grip and utilizes full mechanical travel. It can be disabled through FiiO Control app.

Since there is no battery inside – we should not be worried of leaving BTA30 ON or on charge. Nothing heats up, nothing drains down.

Sound quality:

To carry out adequate test we have decided to describe the sound of BTA30 in comparison to other desktop DACs/amp such as Tempotec Serenade iDSD and Hidizs Sonata DH1000.

Speakers: Edifier M1100.

Lows and midbass:

BTA30 is quite resolving on lows – more than average amount of textures and details. It acts on bass delicately with good control on outlines and good balance with other ranges. Extension of lows is very good, bass is decaying neither too fast or too slow. Great clarity, good volumetric feel and separation from mids and treble. Bass is totally perceptible, enlarges the stage and has no extra emphasis. Mid bass is similarly good: the amount of dynamics is perfect for good articulation and energy.

Mids:

Mids retain most of the resolving potential and sound neutral in overall. Vocals are quite thick and full-bodied. No emphasis is made on female vocals and upper treble range instruments feel naturally bright but not screaming. Voices sound natural and have pleasing warmth. Good instrument separation. In overall, mids feel smooth, little bit warm and natural, with adequate resolution and with no piercing peaks.

Treble:

Treble sounds balanced to mids and lows but its extension, clarity and presence would depend of the type of connection. In DAC mode treble is clear and crisp, not hidden by other sounds. Extension and micro-dynamics are both great, not too cold or vivid. With Bluetooth connection (RX or TX) treble gets slightly less extended and crisp. Like a thin blurring layer has been added to clean window. Nothing strange for the regular Bluetooth sound. In overall, this range is accurate and perfectly balanced to other ranges and allowing long listening sessions.

Compared to Tempotec Serenade iDSD:

Serenade iDSD is not equipped with Bluetooth and can be used only as DAC/preamp or amp for the headphones. This makes iDSD and BTA30 quite different in purpose and gives some advantages in sound to iDSD. It sounds slightly better and more extended on treble if to compare BTA30 in Bluetooth mode. It also gives a better understanding of quality of the sound when connecting headphones which is not possible with BTA30. But with the same active speakers, both devices sound virtually the same.

Compared to Hidizs Sonata DH1000:

Another device that is not equipped with Bluetooth and made for portable use with headphones. This allows to perceive sound quality more delicately until connected to active speakers. With this type of connection, DH1000 sounds similarly detailed but more thin on mids, resolving and putting more emphasis on treble. Lows are not that well-developed as with BTA30, thus loosing stage size and extension. It is better to leave DH1000 for headphones only, while BTA30 really shines in desktop setup.

Conclusion:

All of our initial expectations of what desktop Bluetooth transceiver should be were met by FiiO BTA30. It is perfectly built piece of technology, with neat design, smooth operations, lots of functions and good sound quality. Bluetooth performance is stellar due to its sustainability to RF interference and signal quality, the best so far among all tested devices in both TX and RX modes. A spoon of tar is present in a form of limited USB DAC processing ability but it goes beyond the main purpose of BTA30 and compensated by other more capable interfaces. In overall, this Bluetooth DAC/preamp is great and would fit nicely to any home setup, enabling wireless audio feature and incorporating best widely used Bluetooth audio codecs that are currently available.

FiiO BTA30 is available at AliExpress store: LINK

FiiO BTA30 is available at Amazon store: LINK

Another look at Bluetooth wireless receiver from a different perspective (means another formfactor). This market is trending and so many options are available that it is hard to make the right choice from the very first try. We’ve already been playing with TWS IEMs, Bluetooth neckband wires and standalone devices but not the “ear hook” type DAC/amps. Seen those couple of times before on sales but not from a trusted brand or a supplier. Although, such formfactor always looked promising and intrigued with the possible comfortable fit, battery capacity and max. power potential due to a larger compartments and its universality for different types of IEMs. To be honest, looking at the picture of such type of product, we are not making another idol: yes, it should be better than any other all-in-one TWS or Bluetooth receiver in certain aspects, its universality would stay limited to several IEM shapes or connection types and the product would be worthy to try only after it has passed several iterations and came to a stage of maturity…

With all that in mind, FiiO UTWS3 was kind of a surprise – coming from a well-known portable audio brand, full of features and impressive specs. For us, the most important is that this product represents the next iteration with heavy upgrades to its predecessor – original FiiO UTWS (UTWS1). At least, it means heavy usage, collecting feedback, thinking over, bug fixing, improving and upgrading various aspects, both software and hardware which eventually leads to a better product with polished user experience. Whether it is that mature already? – we would tell in the conclusion. Meanwhile, here is some infromation about the company, a small flashback to FiiO UTWS history and the idea behind its new version:

First of all, about FiiO brand in short:

Guangzhou FiiO Electronics Technology Co., Ltd. was established in 2007 by several former senior staff and tech experts of OPPO, which is a high-tech enterprise focusing on researching and developing portable music products, with current main products being Hi-Res music players, headphone amplifiers&DAC, and headphones/earphones.

There are over 300 employees in total, including a core team with nearly 30 years of R&D experience in audio products, an R&D engineer crew dedicated to software, hardware, industrial design, structure and electroacoustics. The production factory covers an area of 3500 square meters, including an all-new updated dust-free workshop and 4 two-way assembling production lines, with an annual production of up to 1 million pcs.

FiiO specializes in self-research and development, and sells FiiO-branded products through sales agents worldwide which cover 5 continents spanning 65 countries and regions. Since its establishment, FiiO has built a good brand reputation in the industry. In Nov. 2017, the Headphone Branch of China Audio Industry Association was found, while FiiO was honored to join and elected to be the vice-chairman; 3 years in a row from 2017 to 2019, FiiO has been on the Top 10 HIFI Headphone and Digital Audio Brand list, as well as Chinese Top 20 Cutting-Edge IP Enterprise and Guangzhou Little Giant Enterprise of Science and Innovation; By virtue of outstanding product designs, FiiO has received 47 valid patents, including 2 invention categories, and countless well-known awards, including iF Design Award, Reddot Award, EISA Award, VGP Award, and Spring/Autumn Headphone Festival Award.

FiiO has been continuously carrying on the music proposition of “Born for Music”, placing great importance on user needs and ceaselessly pursuing perfection in product design and manufacturing, to supply users with the best audio products at the best prices.

FiiO has already been long involved into Bluetooth audio devices and released full bunch of products with different usage scenarios in mind:

• BTR series Bluetooth AMPs (for use with a smartphone, PCs, etc with the regular IEMs or headphones)
• FB1 IEMs with integrated neckband Bluetooth cable
• EH3NC Bluetooth overheads with noise cancelling feature
• TWS IEMs (popular model of the trending market)
• UTWS1 – Bluetooth ear hooks to use with any IEMs

Considering the popularity of UTWS1 (and its shortcomings on the other hand after some heavy usage) – FiiO has decided to give it a new birth when the product would be free of any previous bugs and inconvenience. Initially, UTWS1 were based on the third-party product that already had some hardware limitations in its core. Therefore, the new generation was decided to be given in-house design, research, development and production processes. The main points of concern (i.e. upgrades) during UTWS3 development were the introduction of independent amplifier, significant increase of the output power and decrease in noise floor, more convenient charging scheme and longer battery life, better noise cancelling ability, IPX4 protection, new volume and power cycle logics and dedicated control application. All of that eventually leads to much better ergonomics and user experience. As far as we are concerned, all of the known and reported issues and inconvenience of the first generation UTWS1 were addressed and claimed to be resolved.

To finalize about the difference to its predecessor, here is the full list of upgrades in UTWS3:

• Now uses independent TPA6140A2 AMP
• Power output increase from 5mW to 25mW at 32Ohms
• Noise floor decrease from 25uV+ to <8uV
• No need to charge each channel with a cable, both take charge from a cradle now and charge faster
• 2nd microphone added for better noise cancelling ability
• Added IPX4 environmental protection
• Volume controls better now (26 levels, better physical buttons)
• Power ON|OFF is now controlled with cradle top cover
• Uses FiiO Control app for settings, upgrades and tuning EQ

Done with the history… Let’s get back to FiiO UTWS3. The specs are as following:

• Chip: Qualcomm QCC3020, Bluetooth 5.0
  • TWS+ Low Latency (2 channels connected at once)
  • 2 independent amps
• Bluetooth codecs: SBC, AAC, aptX
• Output Power:
  • 38mW（16Ωload）
  • 25mW（32Ωload）
• Noise: ＜8μV
• Driving ability: 16~100Ω
• THD+N: ＜0.06%
• SNR: 100dB r”A“
• Output Impedance: ~0.7Ω
• Crosstalk: 94dB
• Balance: ≤0.5dB
• Working Time:
  • TWS+: 7hs of use/charge
  • TWS: 5.5hs of use/charge
  • Overall battery life 30h (800mAh) (4-5 recharges from the case)
• Mics: 2 mics/channel with noise cancelling feature
• Device control over: FiiO Control APP
• Physical controls: multifunctional button (per each channel, on cradle)
• Indicators: multicolor LED (each channel and cradle)
• Wires: silver plated copper integrated wires
• Environmental protection: IPX4
• Connections: MMCX or 2-pin, 0.78mm
• Dimension: 93.5×71.1×34.6
• Weight: 125.5g

FiiO UTWS3 official page: LINK

FiiO UTWS3 purchase link on Amazon: LINK

FiiO UTWS3 purchase link on AliExpress: LINK

Packaging and design:

FiiO UTWS3 comes in relatively small and visually attractive box consisting of outer cover with product graphics and company information and the inner more sturdy black cardboard insert that holds the product itself. FiiO has added a special sticker on the back side of the outer cover as a solution to counterfeit item protection.

Inner box compartment has a special soft insert that holds UTWS3 cradle at place while the cable, user manual and warranty card are stored in the separate envelope underneath. Not much of the accessories, though. Only ear hooks with the cradle and charging USB type-C -> USB B cable. Wonder why FiiO has not included any carrying pouch for the sake of the product long-lasting protection.

Ear hooks are stored inside the cradle and have special stickers pre-applied to charging pins in order to avoid charging during the delivery. Good way to prevent early battery deterioration before it gets to the end user. Just don’t forget to peel it off before use. Cradle, itself, makes a good impression and feel – little bit rough surface, accurate and even strict design. Someone might say that it is boring due to lack of design elements but we’d rather call it – functional. Lightweight, though, We expected its weight to be much more than it really is. There are 3 LED indicators at the facing side of the cradle and USB type-C charging port at the back. Nothing more.

Top cradle cover opens with little effort, totally enough to keep it at place under any circumstances when the external force is not applied. Can’t tell for sure whether it is retained with a magnet but there should be some kind of element like this that enables power off|on logics for the ear hooks. Anyway, folding mechanism looks to be quite durable and feels natural.

The insides of the cradle look more appealing than the externals – neat ear hook profile cutouts at the top cover and base aided by the combination of grey (scratch protection soft material adhesives) and black colors, deep lodgments designed to store third-party IEMs or earphones of virtually any size and shape. Plus the additional button at the most convenient place that does some vital tricks. Don’t worry, it won’t be used too often, only for some initial procedures.

Apart of the cradle, FiiO UTWS3 ear hooks are much more sophisticated devices that contain all the magic. In terms of a design, they consist of the plastic base and flexible ear guides (perhaps, made of a silicone with inner channel for 20 strands of monocrystalline silver plated copper wire). Both channels have FiiO logos on the facing part along with large, easy to reach multifunctional button.

Furthermore, both channels feature 2 microphones protected by aluminum grills, white LED indicators (same opening with the backside mic), magnetic charging pins, aluminum rings acting as channel indicators (left – blue, right – red) and MMCX or 2-pin, 0.78mm connectors (both versions are available for a purchase). And the weight/channel is only 6.5g (without IEMs). Additionally, since UTWS3 features IPX4 protection, both units have special dust/moisture gaskets protecting button and mic openings.

In overall, the design of the whole set is varying from strict and functional (cradle) to clean and practical (ear hooks) with only few eye-catching elements. But what is unquestionable is the precise manufacturing, perfect alignment of all elements and decent build quality.

Fit:

The main point about the fit concerns the type of IEM connector selected during the purchase. MMCX type seems to be the most universal option since the connector allows IEMs to rotate over Y-axis. It gives certain freedom of adjusting the angle at which any MMCX IEMs would go into ear channel. With 2-pin option, it seems that some IEM shapes might struggle to fit into the ears correctly, especially if the output nozzles are given some irregular angle (that deviates much from 90-degrees). It is only our thought that might not be the truth. But we would really appreciate if FiiO would consider redesigning the connectors. The best option would be to have MMCX ear hooks only + the additional MMCX->2-pin, 0,78mm adapter in a bundle. Such approach would solve 2 issues: it would make UTWS3 even more universal out of the box (no need to choose and stick to connector type) and it would also allow 2-pin adapter to rotate on MMCX connection base.

As to our version – MMCX – we have tried it with different types of IEM shapes (custom, bullet, droplet, round) – all seem to fit nicely. The least comfortable for a long ride were bullet-like shaped IEMs since the physical pressure to ear channel increases when UTWS3 ear guides flex more. This happens when IEM body is quite long, which is kind of rare. Short bullet-like IEMs as HiBy Beans, for instance, do not produce any discomfort.

One more aspect to mention in this section is the type of end gear to use in overall. FiiO UTWS3 is designed to be used on a constant basis, for music or videos, during workouts or simply to talk over the phone. The possibility to use each channel independently also makes UTWS3 a great substitute for a handsfree device. In either scenario that involves long sessions (except music or videos), full immersion with total real world isolation is not necessary and even dangerous. Outer noises should be coming in to save yourself from a possible incident, especially outside. Ok, you can use only 1 channel… But in this case, when only 1 IEM is used – you are risking to get a headache, or worse. Therefore, the best option in such usage would be to use earbuds instead of IEMs. For example, such excellent options as Ourart ACG or Ti7.

Device in use:

Since FiiO UTWS3 is quite sophisticated device it requires some learning of control operations. Initially, you would have to charge the cradle and ear hooks (inside the cradle). It takes time, but all 3 devices take charge simultaneously which is a step up from a previous version where you would have to charge each channel separately. Just wait for all 3 LEDs on the cradle to go off – it means that charging is compete. As soon as the cradle top cover is opened – both ear hooks come into life with auto power on function (power goes off when top cover gets closed) and the initial pairing process starts (center cradle LED flashes white and red). Now you can proceed with Bluetooth device discovery on your source device.

You should be able to locate FiiO UTWS3 L (or FiiO UTWS3 R or FiiO UTWS3 L/R) at this stage and connect to it, responding with “allow” whenever requested. This would result in device pairing with both channels connected at the same time. Compatible sources should report aptX as Bluetooth audio codec currently in use. FiiO UTWS3 is ready from now on. We would also recommend to get FiiO Control app from Android/iOS store to gain full control over this device. This application would allow to:

• check each channel battery state
• check and upgrade FW version
• change button functions
• set idle state power off timeout
• enable and tune EQ
• tweak audio settings and change voice language
• reset the device, clear pairing
• read user guide

By the time of writing this review FiiO has already released the new FW: 0.2.46 which has bug fixes and new volume logics listed in the changelog. The process of upgrading requires that only one channel should be upgraded at at time – means, the second channel should be in OFF state. It takes about 2-3 minutes/channel to upgrade and can be performed with OTA or local FW *.bin file. Further pairing reset and reconnect is also mandatory. Done in the following steps:

1. Place both channels in cradle
2. Press and hold button on cradle for 12 seconds to reset and power off
3. Ear hooks would get back to life automatically in couple of seconds and synchronize to each other
4. Now it is possible to connect again

Other cradle button functions:

• Long press for 3 seconds – enter pairing mode
• Long press for 12 seconds – reset pairing
• Short press – remaining battery in cradle

Indications:

• R and L white LED pulses – ear hooks charging (for 15 seconds with no USB power supply, constantly – with USB power supply)
• R and L white LED pulses go OFF – ear hooks charged
• Central white LED ON for 5 sec after opening top cover of pressing button – cradle remaining battery >20%
• Central red LED ON for 5 sec after opening top cover of pressing button – cradle remaining battery <20%
• Central white LED pulses – cradle takes charge
• Central white LED ON – cradle fully charged
• Central LED pulses white and red – ear hooks pairing in process when in cradle

Left ear hook button:

• Single click:
  • Resume playback
  • Decrease volume
  • Answer call
• Double click:
  • Pause
• Triple click:
  • Activate voice assistant
• Long press:
  • Previous track
  • Hang up
  • Decline a call

Right ear hook button:

• Single click:
  • Resume playback
  • Increase volume
  • Answer call
• Double click:
  • Pause
• Triple click:
  • Activate voice assistant
• Long press:
  • Next track
  • Hang up
  • Decline a call

For both channels when not in cradle:

• In OFF state – press for 1 second to power ON
• In On state – press for 5 seconds to power OFF

Huh… Requires some time to memorize…

As stated in the description, full charge would allow to use each channel for ~5.5 – 7 hours (which is close to real world figures) and the cradle would also allow to fully charge both channels for 5 times.

No problems were met during pairing process, real world usage, charging or upgrading the firmware. FiiO UTWS3 declared functionality seems to be fully implemented and thoroughly polished. Phone calls don’t disappoint either, providing good voice quality and smplartphone-level noise cancelling performance. Buttons do the job as expected and defined above.

Sound quality:

Now, to the most interesting part. Our testing setup would be HiBy R5 Sabre DAP + FiiO UTWS3 + ArtMagic DH3 (15Ohms) IEMs and aptX codec. We would leave out examining sound with SBC or AAC as less capable codecs, not worth of attention if you have already spent more than $500 for the entire setup. Qualcomm QCC3020 chip over AptX, at least, gives you 16bit/48kHz at 384 kbit/s and frequency response 20Hz – 22.7kHz. More than CD quality but not HD yet.

DH3 are hybrid, easy to drive IEMs with only 15Ohms impedance and 105dB sensitivity. It results in ~55mW of power from UTWS3 which is more than enough to squeeze out the appropriate dynamics and volume level. Such IEMs would get very loud, almost unbearable. Anything sensitive up to 50Ohms should be driven adequately.

Since UTWS3 feels quite linear in tuning, there won’t be any accents on either range other than IEMs would produce on its own. In comparison to cable connection, a certain model of IEMs would sound quite similar, with slightly less clarity on treble, slight decrease in overall resolution and texturing. First addresses Bluetooth codec potential that usually strikes the highest octaves, while the resolution suffers from the limited potential of hardware processing packed to a single chip with significantly reduced element base. But this is only in comparison to HiRes DAP as a source. If to compare UTWS3 to a regular smartphone output sound – some of its aspects would even get improved. For example – midbass dynamics.

In overall, UTWS3 lows feel quite collected and contoured rather than deep or extended, midbass has appealing dynamics and power, mids are linear, with moderate resolution and good balance between male and female vocals, lower treble feels calm and delicate while the extension is slightly below the average. We wouldn’t insist that UTWS3 is capable to substitute wire for a quality-aware listener, neither we would say that UTWS3 cannot substitute wire when necessary for any audio fan. Since it doesn’t add any coloration to regular sound of your favorite IEMs or earbuds – it is a good option whenever wires limit your mobility.

Compared to Hidizs H2: completely different formfactor, still portable, much more capable in terms of Bluetooth codecs (aptX HD, LDAC, UAT) but at the same time – more limited in power output and more susceptible to audio lag. Yes, Hidizs H2 has its numerous strong points but FiiO UTWS3 are far better if the usage scenario is portable everyday use. Especially with a smartphone, when you want to answer calls. Sound-wise, both are neutral sources for IEMs and both behave quite similar. H2, of course, has more potential due to HD codecs but cannot drive similar loads as FiiO UTWS3 do.

Compared to ColorFly BT-C1: almost similar to Hidizs H2, ColorFly represents a standalone product with less portability in mind. It is a closer match to UTWS3 due to only aptX codec support and same power output level. It is very neutral, if not to say boring. Mostly designed to be used as a shelf receiver for active speakers. Not a contender for its planned way if use and less appealing tuning.

Compared to TFZ X1: perhaps the closest match of those, but in a formfactor of IEMs with inbuilt Bluetooth receiver. Less universal, limited to only 1 sound character, less sophisticated in terms of functions and much worse during the phone calls. Overall user experience of TFZ X1 is far from ideal – buttons are too small, LEDs are almost invisible, noise cancelling not good. But the build quality is decent, aptX is supported and sound is quite impressive. FiiO UTWS3 definitely wins, thanks to the possibility of connecting different IEMs.

Conclusion:

Perhaps, FiiO UTWS3 is currently the best representative of what Bluetooth TWS product should be like. Polished in a second iteration, free of bugs or limitations, with adequate revised logics – this product provides strong user experience and stellar performance in the most universal formfactor. Neckbands, TWS IEMs, standalone receivers – all would be less capable or portable in everyday use, either not allowing to switch end gear or to perform routine activities in the most convenient way. FiiO UTWS3, with the idea of universal wireless receiver for any IEMs or earbuds, does the trick in a best possible way, providing audio fans with enough quality and regular user with the appropriate level of comfort and functionality. Or the mixture of those, as the most valuable result. We would definitely stick to this product for a long period as the most universal option currently available on the market…

FiiO UTWS3 official page: LINK

FiiO UTWS3 purchase link on Amazon: LINK

FiiO UTWS3 purchase link on AliExpress: LINK

Couple of days ago, together with Black Friday discounts for the entire lineup, Hidizs has announced their new product — H2. My sample unit has landed about a week ago and here is my presentation and in-depth write up of this device.

So, what is Hidizs H2? It is a small DAC unit that is positioned by Hidizs as Bluetooth receiver. Although, its functionality goes beyond that definition. Along with acting as a Bluetooth DAC, it allows USB connection as well. I have already been dealing with other Bluetooth standalone receivers from HiBy (W5) and Colorfly (BT-C1), Bluetooth cables for IEMs (Hidizs H1) and tabletop DAC|amps with Bluetooth audio reception (Audinst HUD-DX1 Blue24) but neither one of those was similarly capable in terms of HD audio codecs support or didn�t have USB DAC function. Of course, H2 is not free of some limitations which would be described here later. For now, my point of what makes Hidizs H2 almost unique is that it combines the support of all known Bluetooth HD audio codec and USB DAC function.

Hidizs H2 specs:

As we can see from the specs published by Hidizs, the supported HD Bluetooth codecs cover Qualcomm aptX HD, Sony LDAC and even 192kHz, 1.2Mbps HiBy UAT. Of course, less sophisticated regular codecs such as aptX, SBC, AAC are also supported.

From the standpoint of HW architecture H2 is based on 24bit|192kHz Qualcomm CSR8675 SoC which incorporates Bluetooth 5.0, TrueWireless, WirelessBroadcast and active noise cancelling cVc technologies (yes, H2 does have a mic onboard and allows regular calls with noise cancelling). Amplification is done on behalf of MAX97220 differential amplifier chip. Although, despite theoretical datasheet power output stated as 125mW @ 32Ω, H2 is only producing 8mW|channel with the same impedance. This is the only arguable specification of this device. Nevertheless, as derived from further tests, it still drives 32Ω to an appropriate level and the rest of the specs remain quite impressive.

Packaging and design: 

Hidizs H2 comes in a small black matt box standardized across most of the product produced by Hidizs. Box contains silver imprints of specs, manufacturer info and logo together with glossy device outlines.

As a matter of fact, this box could have been much smaller in size since H2 is pretty tiny device and consumes just a fraction of the space inside. It is stored in the special top level insert while all accessories are located in another compartment beneath. Accessories include:

• USB type-C -> USB type-C (host|slave) cable
• USB A -> USB type-C cable
• plastic case|clip
• leaflets, warranty card

H2 housing is made of solid piece of resin (German Makrolon) with front and back glass panels. Such choice of material not only looks great and resembles overall Hidizs design principles, but also stays transparent for the radio waves ensuring the best reception quality.

The design looks clean, simple and attractive at the same time. Personally, I admire the approach of placing logos and text behind glass panels — it makes it shine and protects from any damage. Unfortunately, scratches on the panels are inevitable in future due to the absence of protective film. At the same time there are factory protection films from the box but those are used for transportation purposes. The best way, probably, would be cutting off special peel off projections from this film and leave the rest on the device.

Since H2 has NFC module for easy pairing, it contains NFC logo under the front glass panel. Right edge contains power button and 3-color LED, left — volume up and down button. Mic opening and 3.5mm audio output is located on the top edge while USB type-C port is on the bottom. Buttons are not rattling and have a good actuation feel.

Plastic case|clip is a great accessory which is familiar from Hidizs S9 DAC|amp. It is made of transparent plastic with rough surface finish, securely holds H2, allows easy access to all buttons and doesn�t cover mic opening. Clip spring tension is more than enough to be confident that H2 would not get lost during a workout.

Preparing H2 for use:

Very straight forward: H2 requires ~1.5H to reach the full charge and indicates the process with flashing red LED. There are 2 scenarios after that: either to connect H2 to a smartphone or PC with a cable or to pair it with any device over Bluetooth. Second scenario can be achieved by a regular pairing process or by using NFC of H2 for faster identification and connection. Long press Power button to enter pairing mode. H2 would quickly flash blue LED to indicate that the process has started (and would go into slow flashing mode when paired).

When paired with a smartphone, it is better to use HiBy Blue from the corresponding app market in order to monitor connection quality, codec in use,  battery state, use the additional EQ and to be able to upgrade the firmware. Most of the functions of this app are not required if H2 would be used with HiBy Music app over Bluetooth or USB. EQ and audio codec would be pushed by this app instead of HiBy Blue.

By the way, H2 has multipoint function and allows 2 device to be connected over Bluetooth simultaneously.

H2 in use: 

There are different stated of LED that indicate device operation:

• Charging — flashing Red
• Pairing — fast flashing Blue
• Up to 48kHz — slow flashing Green
• 88..2 up to 192kHz — slow flashing Blue

Button functionality:

• Power button
  • Short press — play|pause
  • Long press — on|off
  • Very long press in OFF mode — pairing
• Volume up|down
  • Short press — volume up|down
  • Long press — next|previous track

There are integrated voice prompts for standard functions such as power on|off, connection state and pairing.

Switching between LDAC, aptHD and other audio codecs is done from a smartphone under the Developer options menu. Initially, H2 would be pushed with the best possible supported codec from a smartphone. In my case it was LDAC (Xiaomi Redmi Note 8Pro). Although, in order to switch to the supreme HiBy UAT we would have to run either HiBy Music or HiBy Blue (if other music app is used). The connection distance free of any hiccups for LDAC and UAT can reach up to 10 meters at open space. Even one thin concrete wall is not a severe obstacle but the distance gets limited to 2-3 meters from a wall at one side.

When using cable connection with a smartphone — USB DAC gets recognized and everything works correctly. Bit-perfect mode is allowed be HiBy Music app. The only concern is that the cable has host and slave sides and should be connected in a correct way. Microphone with noise cancelling function works great, allowing to accept and answer the calls. No complaints from the other party in terms of voice quality.

H2 runs flawless in Windows 7,8 and 10 environment as well. The device is getting recognized by the system as Hidizs H2 USB sound card with integrated mic. No driver is needed. Furthermore, there is no driver available from Hidizs till now. The maximum audio quality listed in device properties is 16bit/48kHz what makes me wonder about the possible release of special monopoly mode driver later by Hidizs. Current native Windows driver does not occupy H2 and allows all sounds with no lag in videos. Which is good.

The difference in device operation time from a single charge in Bluetooth or cable mode is hard to tell since H2 starts charging when connected to USB port of any device. Therefore, it would drain source battery before running out of charge. Stated battery life in Bluetooth mode is close real time figures. I�ve got 6,5H battery life of playing audio with LDAC codec.

One good function that should be mentioned is the ability of H2 to play music and take charge at the same time. This allows to stay connected even if the battery has drained. Or to use H2 as Bluetooth receiver in home setup.

Sound quality:

I would not get too deep in this section since my perception of Hidizs H2 purpose is very subjective. The main scenario for me is integrating Hidizs H2 into home stack as a Bluetooth receiver, allowing LDAC and UAT decoding and passing the signal to external amp or active speakers. Such scenario is not that demanding in terms of output power.

Of course, the initial tests were done using IEMs (Hidizs Seeds, 25Ω) and full-sized AudioTechnica (ATH-M50, 38Ω). Surprisingly,  in both cases the audio quality does not disappoint and both models are driven adequately. IEMs with such impedance even have some room to increase the volume further, while full-sized IEMs are just on the edge of H2 potential. This also leads to properly driven IEMs showing better overall dynamics, integrity of lows and midbass, separation of each instrument and more perceptible resolution. ATH-M50 sounds more dirty and tends to leave out some details by mixing instruments together at higher volume levels. But this is expected behavior with such output figures.

In overall, when paired with low impedance | high sensitivity IEMs, H2 sounds clean, while tending to warm sound in signature. It shows moderate amount of details across the entire range, good midbass dynamics and power, pretty thick mids and has no irritating peaks on highs or upper mids. Cable connection delivers better extension and clarity at both ends (especially on higher frequencies). As always. I should mention here that the audio lag in Bluetooth is more apparent which should be considered when watching videos. It is acceptable but close to the point of getting a  desynchronized with the video stream.

To summarize: H2 should not be regarded as a potential competitor for such products as Hidizs S8, S9 portable DAC|AMPs and AP80 DAP lineup — it is not capable to deliver the same level of audio quality due to a limited power output. On the other hand, it sounds more balanced, clean and impressive that a regular smartphone or PC with the appropriate IEMs or in active home setup.

Conclusion:

Hidizs H2 perfectly does the job of HiRes Audio Bluetooth receiver in active home setup by supporting the most sophisticated audio codecs, multipoint connection and simultaneous charge. While in the portable usage scenario the user should be aware of its limited driving ability. Other than that, Hidizs H2 is a good performer with rare combination of Bluetooth receiver and USB DAC functions. Moreover, its implementation and user experience is flawless. Therefore, it is recommended to consider if its main features and virtues fit the desired setup.

Hidizs H2 official store: LINK

10%OFF for any order at Hidizs store: link

Official Hidizs Amazon store: LINK

Thank you for reading.

Stay tuned, more articles to come!

TRW or wired? If bluetooth — what is the most convenient formfactor to go with…? I�ve been asking myself the same questions for past few weeks trying to find the best possible solution of having all time access to music, phone calls and videos despite of current activity or working place. Wired are still the best IEMs in terms of audio quality but staying connected all the time with a cable significantly reduces my mobility. What is more important — cable always stays connected to one particular source. I wouldn�t mind if a smartphone was the only working tool. But it is not. There is at least a laptop that also requires a connection. As to the formfactor — current TRW beans (as I name all that numerous, expensive and faceless products that have saturated the market) just do not seem to be comfortable enough, especially with no supports and when it comes to removing one of the beans which should than be placed into its cradle, which should be kept in a pocket, etc… Audio quality in such beans is also far from being astonishing.

Knowing all of that, I�ve been looking for another option that seems to be much more convenient and universal in terms of sound and fit: good, custom-like shaped IEMs with regular type of connectors and detachable bluetooth cable that would have all necessary controls, mic and aptX, at least. At the time when I was wondering which product to go with — Hidizs was watching after me  The search was over when they have provided me with the new product for the review — Hidizs H1 — neckband bluetooth IEMs.

Hidizs H1 is still absent at the official website during the time of writing this review since it is a sample unit that should get the initial feedback and hit the market very soon. (Updated: Hidizs H1 at official website) The specs are already known:

Hidizs H1 — Mermaid Series Bluetooth IEMs:

• Driver: signle dynamic, 10.2mm, dual magnetic circuit, dual cavities
• FR: 20Hz-40kHz
• StN Ratio: 95dB
• Sensitivity: 112dB
• Impedance: 20Ω
• Cable connection: 2pin, 0,78mm
• Weight: ~6g
• IPX5 dust, water, sweat resistant

Bluetooth cable:

• Cable:  silver plated OFC
• Bluetooth: 5.0 (Qualcomm QCC3005)
• Protocols:
  • AAC (16bit|44.1kHz_320kbps)
  • SBC (16bit|44.1kHz_328kbps)
  • aptX_LL (16bit|44.1kHz_352kbps)
  • aptX (16bit|48kHz_352kbps)
• Control protocols: AVRCPV1.2&SPPV1.2
• Call protocols: HFP, HFP1.5,HFP1.7,HSP,CVC

• Controls: +/-, play/pause buttons
• Mic: yes
• Ports: microUSB for charging
• Charging time: 1.5 hours
• Play time: 8 hours
• Weight: 13,6g

Packaging and design:

First of all, H1 packaging reminds me of TFZ products that usually come in very similar tall boxes. Plenty of item information, good printing quality, dense material, shiny logo — this box certainly deserves good score for its appearance.

The insides are well protected and look neat — couple of boxes with the accessories and a soft podium that has special cutouts for IEMs. The full list of included items:

• Hidizs H1 IEMs
• Bluetooth cable with soft velcro strap
• 3 pairs of silicone eartips
• soft pouch
• USB A -> microUSB cable
• couple of leaflets and user manual

Wondering why Hidizs has not included regular audio cable into this package… Why artificially limiting a potential demand for IEMs that are designed to be used with different types of 2pin, 0,78mm cables? Going little bit ahead — H1 have good sound quality but the full potential is released only in wired mode…

Hidizs H1 possess one of the most convenient design of the shells currently available on the market — custom like shape with very comfortable fit. Shells are made of resin with shiny particles to aid its look.

The design gets even more attractive due to the transparent material. Even black color shells totally disclose the insides. Aluminum alloy gold-plated output nozzles protrude quite significantly from the shells and glued at place. Both covered with the protective aluminum grills.

IEMs are equipped with 2pins, 0,78mm connectors with transaprent resin base, brand name and channel indicators. Just to point out is that H1 are based on Hidizs MS1 Rainbow series IEMs — same signle dynamic driver design, same specs…

Bluetooth cable is claimed to be twisted silver plated OFC, ending with flexible earguides, 2pin, 0.78mm connectors with transparent resin base and channel indicators.

Electronics consists of two separate parts: one is a battery box and another contains all physical controls, LED, mic and charging port.

Both parts are equal in size and shape and both have the same charcoal coating and rough surface feel. Length of this bluetooth cable is ~0.5m. Charging port is protected with a rubber cap.

As far as I understand this bluetooth cable is the next generation of Hidizs BT01 but with some advanced features i.e. bluetooth 5.0 (Qualcomm QCC3005) now and slightly different design. I might be wrong, but it seems that the new cable is also based on CSR8645 DAC chip with 20Hz-20kHz frequency response, -115dB SNR and 15mW (32Ω) power output.

Fit:

As already mentioned — H1 fit is perfect. Long nozzles, flexible earguides and custom-like shape dedicate much to the overall comfortable feel. This shape is much better than any TRW bean-shaped IEMs I�ve played with. There is absolutely no feel that H1 would get lost one day… Such an excellent fit finally results in better protection from outside noise and wider audible response range.

Hidizs H1 setup:

Initial setup means charging and pairing Bluetooth cable with the audio source. Mine came 70% charged and it took about 20 mins more to get the charge up to 100% using laptop USB port. Full charge would take ~1.5 hour which is quite fast.

There is a LED indicator at the front of the control unit that would stay RED during charge. Other LED statuses are:

• Constant green — fully charged
• Slowly flashing red — low charge
• Flashing red-blue — pairing
• Slowly flashing blue — connected bit not playing
• Constant blue — no connection
• Slowly flashing green — connected and playing music/call

There are also some automated functions worthy to mention:

• If powered but not connected -> would power off in 360 sec
• If pairing but not successfull -> would power off in 360 sec

Additional voice prompts:

• Power ON
• Power OFF
• Pairing
• Paired
• Pairing fail
• Headset is connected
• Headset is disconnected
• Battery low

Button functions:

• Play|pause 2s press -> power on or off
• Play|pause 5s press -> pairing mode
• Vol + | Vol — together -> clear pairing
• Play|pause short press -> answer call | hang up (in a call)
• Play|pause 2 sec during incoming call -> reject
• Play|pause short press druing music -> play | pause
• Vol + | Vol — long press during music -> previous | next track
• Vol + | Vol — short press during music -> volume
• Vol + | Vol — toghether + Play|pause during power off -> USB upgrade

Pairing with a smartphone or DAP doesn�t take long and the device gets recognized as H1 headset. My Xiaomi Redmi Note 8 Pro is running Android 10 and shows H1 battery charge level / current audio codec as well. Furthermore, not having it listed among the supported functions, I�ve checked H1 multipoint ability — it can be paired and connected to 2 devices simultaneously which is very welcome.

Tested all controls — no problems here. Stock audio app and Hiby Music both respond to button presses. Mic works good during the calls, voice is clear. Although, in loud environement it lacks the noise cancelling feature and sometimes the other side would complain about that. Other drawback that I have faced is the connection distance — H1 gets disconnected or shows interruptions even at 5m but I would blame my Xiaomi smartphone for that — Note 8 Pro has known issue with Bluetooth | WiFi limited range and poor behavior. My laptop is keeping connection with H1 even at 12m away. DAP also holds better than the smartphone.

I have also tried HiBy Blue app from Google Play which shows current H1 audio quality, volume level and charge and found this app mostly useless unless there would be OTA or wired H1 FW upgrade that can be executed with this app. Or unless you are running old Android version that would not provide you with all necessary information about H1 state.

One more important test is the latency while watching videos — guess what — everything is perfect! No visible and audible lag between the picture and sound. This is absolutely great especially at the time when video is the most consumed media of all.

Sound quality: 

Tested with AP80Pro DAP, Redmi Note 8Pro with Bluetooth aptX

Lows and midbass:

Hidizs H1 deep bass extension is moderate with above average texture resolution. Deep bass lacks presence while the emphasis is on the midbass. H1 are definitely closer to dark sounding IEMs but lower portion still might have been better. Situation gets better while using audio cable instead of bluetooth — textures get more evident and lows get more extended.

Midbass shows good dynamics, power is appropriate for engaging drums. It is well balanced to mids and not accented to distruct even with low audio quality tracks.

Mids and vocals:

Quite impressive mids with very good performance. Resolution is quite high while the entire presentation feels linear. H1 doesn�t accent female vocals, not showing any signs of screaming notes here.  Instruments and vocals are  similarly rich and full bodied. Good level of separation in this range, nothing tends to mix at different volume levels. In overall, H1 mids can be described as warm, thick, quite smooth and well exposed.

Treble:

Here comes another portion which depends of the type of connection. Bluetooth audio even over aptX lacks the clarity and extension making H1 darker than it is. Quite good for regular listening but far from a standard when it comes to some high quality recording and habits. Treble is just what I call «bit dirty» to be pleased with. Getting wired changes the picture completely — treble gets the appropriate level of details, clarity and extension. In this configuration, Hidizs H1 are quite balanced IEMs that can easily compete with its class rivals from other well known brands. Sorry for that folks, but treble is still the most affected range when getting rid of wires.

Sound summary:

Hidizs H1 sound should be evaluated with both connection options — bluetooth cable and regular audio cable. Sound quality greatly depends of that. Using regular audio cable connection the sound can be described as well balanced, with slightly exposed midbass, moderate bass extension, thick mids and clean treble. Sound signature is warm. Bluetooth connection type reduces resolution, cuts the extension of bass and treble and leaves H1 underestimated. Although, it does the trick for everyday use in all general tasks.

Conclusion: 

If you are looking for a good bluetooth IEMs product for everyday use but also willing to get high sound quality over the wire — consider Hidizs H1 as the very attractive option. Not only it allows to stay connected to several sources all day long, receiving calls, watching videos with no audio lag and listening to music but also it is capable of resolving high audio quality in wired mode. The fit is great, bluetooth features are up to date, versality is much higher than any bean TRW may offer. Just keep in mind to get the additional audio cable to release Hidizs H1 full potential.

10% discount for any item at Hidizs store using our promocode: ZMCR10

Hidizs H1 at official website

Official Hidizs Amazon store: LINK

Thank you for reading.

Stay tuned, more reviews to come!

Sometimes is it good to get a rest from talking about IEMs of various size and shapes and jump into something more sophisticated that drives this equipment. Audinst is a brand for PC-based Hi-Fi audio components, located in South Korea and established in Y2009. Imposing amount of nominations and awards since than in respected Japan VGP and several other contests won by different products, especially the HUD series of USB DAC&AMPs. The latest one and current flagship in the lineup is HUD-DX1 Blue24 was released in May 2019 and is a topic for my review today.

Audinst HUD-DX1 Blue24 technical specifications:

• Type: USB DAC&AMP with wireless HD audio

Hardawre part:

• D/A Converter: ESS9018K2M
  Type: 32-bit Hyperstream Reference Stereo DAC
  DNR: 127㏈
  THD+N: -120㏈
• OPAMP:
  Operating Voltage: ±12V(with DC Adapter), ±5V(USB Bus Power), Inverted circuits
  I/V Converter: MUSES8920E (SMD x 2)
  Differential Amplifier: LME49720NA (DIP)
  Line Out: OPA2134PA (DIP)
  Headphone Out: TPA6120A2 (SMD)
• Bluetooth aptX HD:
  Controller: CSR8675
  Bluetooth specs: 5.0
  Supports: 24bit/48㎑
  Codecs: AAC / SBC / aptX / aptX HD
• Digital Input (PCM Only):
  Type: S/PDIF Optical on TOS-LINK 44.1~192㎑
  Format: IEC-60958, S/PDIF Compatible
  Sample rate detection: 44.1 — 192.0㎑
• Headphone Output:
  Type: 6.35㎜ Stereo phone jack / 3.5㎜ Stereo mini 4-pole jack
  Max Out Level: ±10Vpp@600Ω (When removing the gain jumper)
  Max Output Power: 1.5W @ 32Ω
  Output Impedance: 2Ω (Load: 16Ω ~ 600Ω)
• Line Output:
  Type: Unbalanced RCA
  Level: ±3.2Vpp max
  Impedance: 200Ω
• USB Audio:
  Type: max 32bit/384㎑, USB 2.0 High-Speed
  OS Support: Windows 7 / 8 / 8.1/ 10, Mac OSX compatible
• Power Supply: USB 5V or DC adaptor 12 — 15V

Playback compatibility:

• DSD Playback:
  Native DSD Support: DSD64 (2.8㎒) / DSD128 (5.6㎒)
• DXD Playback:
  DXD Support: DXD 24bit/352.8㎑ ~ 32bit/384㎑
• PCM Playback:
  Bit depth: 16 / 24 / 32-bit
  Sample rate: 44.1 — 192.0㎑
• MQS Playback:
  Sample rate: 96.0 — 192.0㎑

Physical:

• Input selection switch: S/PDIF Optical + Bluetooth / OFF / USB
• Output selection switch: Headphones / Line out
• Volume dial: potentiometer
• Inputs: USB / S/PDIF Optical + Bluetooth
• Outputs: RCA line out / 6.35㎜ / 3.5㎜ headphones
• Dimensions: 104(㎜) x 120(㎜) x 34(㎜)
• Weight: 310g

You can buy Audinst HUD-DX1 Blue24 on Ebay

Also available at Audinst offical store

Official Audinst website

Packaging, design and build quality:

HUD-DX1 comes in pretty large box wrapped with extra cardboard layer that contains high quality graphics and prints describing the product. Complete technical specifications and long list of all embeded features gives the full understanding about the product at a first glance.

The box itself has a strict black design with brand name as the only element and foldable top cover. Inner box compartment is devided into two layers: HUD-DX1 rests on top and secured by special foamy insert while the rest of the accessories are located underneath, stored in dedicated bags and protected by the additional cover.

Packaging is very neat and feels very durable to stand against unappropriate treatment during long shipping journeys. Boxes of similar products that originated from China and landed at my door was less impressive in terms of design, print quality and durability.

Box contents:

• Audinst HUD-DX1 Blue24 DAC&AMP
• DC, 15V/1A power supply
• USB type B -> USB type A cable
• A set of aditional rubber legs with the adhesive (4 pcs)
• Hex-screw tool (for removing faceplate / volume dial)
• User manual

Physical design of HUD-DX1 is not new, similar approach is shared across many other brands for such kind of equipment. Material for all of the parts is aluminum, painted in black with matt finish, with separate front and back plates attached to unibody chassis with the screws.

Chassis have special guides inside that hold the main board at place. Main difference between the products are usually spotted when looking at quality of the cutouts, painting and prints closely. Audinst has done a perfect job here — everyhting is super neat. All input/output panel cutouts are perfectly aligned with the physical elements, all edges are pocessed well.

Control switches and volume dial feel silky-smooth in operation. Absolutely nothing to complain about. Hopefully, Audinst would introduce white color option of HUD-DX1 Blue24 similar to HUD-DX1 V2 as it looks much more appealing due to the eye-catching contrast of outlines for all physical elements at front and back panels.

Let�s now take a look inside and try to identify all declared HW elements on the main board. The only tool needed to get the main board out is the provided hex-screw driver. First — unscrew volume dial stopper and proceed with 4 screws on the face plate. The main board should easily slide out of the chassis afterwards.

As you can see on the pictures all declared HW components are present. NICHICON UKA series aluminum electrolytic capacitors, XMOS chip, MUSES, TPA, together with LME and OPAMP on DIP which also means that there is a chance for the further upgrades and experiments with the sound.

Gain jumpers that should be removed to release full output power potential are located in the headphone output / amplification area. This is necessary in case of using >300Ω headphones.

Bluetooth receiver is combined with SPDIF/Optical and looks as an add-on board which is easily removable. The processes of soldering, component alignement and final QC seem to be perfecty debugged and fully tuned at the factory.

Preparing for use:

There are several usage senarios applicable to this DAC&AMP that should be considered:

1. Using it with PC or MAC over USB / TOSLINK
2. Using it with smartphones or other audio sources over USB OTG / TOSLINK
3. Using it with any audio source as wireless Bluetooth HD Audio receiver

First option requires to have the dedicated audio driver that is available for download from Audinst official website. This is ASIO driver developed by Thesycon (German SW developing company) and adopted by Audinst to comply with all features of HUD-DX1 series DAC&AMPs. Native Windows 10 driver, if used instead, would not provide similar functionality and would pass the stream over WASAPI instead of ASIO.

If in case of some vendors from China that are using unreliable and unsigned TUSB ASIO driver I would insist on using Win10 native WASAPI options, the driver provided by Audinst is free of any glitches and, moreover — has very small audio lag that allows you to comfortably watch videos. So, just download and install the driver prior to plugging HUD-DX to your PC. Of course, you would need the provided USB cable for that.

Another option is to pass the music from your smartphone or other USB OTG equipped device to this DAC. This is more difficult as the necessary cables are not included. Regular OTG microUSB or microUSB type-C -> USB type-B should do the trick. I have tested my Xiaomi smartphone with microUSB -> USB A (female) adapter that was connected to stock USB cable provided by Audinst — everything worked as expected. Using HiBy Music App to pass the stream to USB device.

And the last option is to connect to HUD-DX1 Blue24 with Bluetooth. Best to be used with any device capable of aptX-HD codec. In this case you�d get 24bit/48kHz wireless audio. No problems found during discovery and pairing process — HUD-DX1 identifies itself as Audinst Blue24 among available Bluetooth devices. You just have to put the input mode selector switch to OPT/Bluetooth position. External 2dB antenna provides extended range of reliable signal reception. Even a couple of walls are not a huge obstacle for the fluent performance.

Note: Audinst recommends to use the provided 15V DC power supply instead of using 5V over USB port for the sake of best audio quality, no voltage drops and sufficient power to drive higher loads. 

Device in operation:  

HUD-DX1 is a simple device with intuitive controls and working modes. Input selector switch is used whenever you want to change from USB to Optical/Bluetooth or switch device OFF and output selector allows to send audio to active speakers or headphones. No more controls except the volume dial which is linear and smoothly increasing and decreasing the volume, utilizing 100% of full travel. This is important because many cheaper products would have discrete volume dial with severe dial position to real volume output mismatch. It usually results into sudden increase in volume from 0 to a certain minimum at ~10° travel and audible volume steps during operation. HUD-DX1 is true analog and very linear in this respect.

There is a small LED indicator located between volume dial and mode selector that informs of the different workig states:

• OFF (mode selector in OFF position)
• Orange (USB mode ON, no data stream)
• Green (USB mode ON, acting) / (OPT/Bluetooth ON)

Switching between different outputs happens with no lag and audible clicks. Going between modes takes the time necessary to locate the evice, acquire stream and fill the buffers. But the glitch free and consistent results show that the hardware and software parts were designed wisely. Other devices that I have would hang up and require reboot when trying to cycle through modes and outputs with the same frequency.

Another outstanding results worth mentioning is the output power of HUD-DX1 amp section which results in high drivability potential. Power goes as high as 1.5W@32Ω which is superior to any other device ever mentioned in my reviews. This is the first time I was afraid of burning down my reference full size headphones and IEMs. Half of volume dial travel is the maximum I could withstand and my IEMs would handle… A bit more volume needed to get 150Ω headphones feel uncomfortable. Three times as much as my most powerful DAP would produce. Consequently, 600Ω headphones should be perfectly driven by this device.

Despite 15V power supply, no heating issues while handling 24bit/192kHz stream and using 150Ω headphones were noticed. HUD-DX1 aluminum case was fixed at about room temperature and no further fluctuations. It seems that the main board location in chassis with sufficient space between the top and bottom walls dissipates the heat effectively.

Sound quality:

In order to carry out adequate audio test with comprehensive description of the results, I have decided to describe the sound of HUD-DX1 and to compare it to other similar devices: Tempotec Serenade iDSD and Hidizs Sonata DH1000. Moreover, HUD-DX1 would also be compared to HiBy R6Pro as one of the most powerful DAP with my favorite reference sound.

Reference headphones and IEMs used for this test: Audio Technica ATH-M50 + Tanchjim Oxygen. Speakers: Edifier M1100.

Lows and midbass:

HUD-DX1 Blue24 is able to resolve lower range with great amount of textures, moreover it delicately delivers bass with perfectly outlined boundaries in just-the-right amount. Extension of the lower end is very good, bass is decaying neither too fast or too slow. Lows show good clarity, have enough of volumetric feel and perfectly separated from interferening with mids and treble. Bass is not accented but fully perceptible, enriching the sound and making the stage wider. Excellent tuning for balanced lower range delivery.

Midbass section is similarly great: tight and powerful. Amount of air and dynamics is enough for natural articulation while reproducing drum section. Sound stays neutral and balanced here — no weight added to lower or higher portion.

Mids and vocals:

The most of the resolving potential pops in the mids while this section still remains neutral in overall. Vocals are rich, quite thick and full-bodied. They play a central role of the scene as it should be in monitor-like sound. No tendency towards emphasizing female vocals or upper treble range instruments has been spotted. No harsh and screaming notes. Male and female voices sound natural, fully exposed and both have a slight touch of warmth. Plenty of micro detalization is perceived with the most of the instruments while all are evidently spaced across the stage. Impressive instrument separation also dedicates much to enlarged stage depth. In overall, mids feel smooth and natural, more than adequately detailed and free of any disturbances.

Treble:

Treble portion has a slightly higher presence in the entire sound picture that HUD-DX1 produce and perceived as more pronounced than mids or lows. Treble is clear, crisp and not obscure by other sounds. Its extension and microdynamics are outstanding but not too cold or vivid. Minor amount of additional sibilances is produced by this range that might slightly affect vocals and some instruments in mid range but it greatly depends of the quality of the recording and it is initial mastering EQ. Too bright original sound might be affected and more neutral or bassy tracks are not. So, this range is accurate in general and totally compensates good bass presence without producing piercing effect and allowing long listening sessions.

Soundstage:

HUD-DX1 is definitely one of the most capable devices in terms of building the imaginary stage width and depth. Especially when paired with the IEMs or headphones also capable of the same. Stage is dramatically large with precise instument locations, defined contours and good layering between the ranges.

Audinst HUD-DX1 Blue24 Pros and cons: 

V/S Tempotec Serenade iDSD: 

Pros:

• Better texturing and contouring of lows
• More resolution on mids
• More extended and vivid treble
• Much higher power output (1.5W@32Ohms)
• Wireless audio (Bluetooth aptX-HD audio)
• Better physical controls
• Volume dial utulizes full travel
• Superior ASIO driver
• Better packaging
• May work with no external power supply

Cons:

• No

V/S Hidizs Sonata DH1000:

Pros:

• More resolution on mids
• More extended and vivid treble
• Larger soundtage
• More native formats supported (DXD, MQA)
• Much higher power output (1.5W@32Ohms)
• Wireless audio (Bluetooth aptX-HD audio)
• 6.35mm output
• TOSLINK
• Physical controls

Cons:

• No balanced 2.5mm output
• No in-built battery
• No additional OTG cables among box contents
• Cannot be used as portable DAC&AMP

Therefore, if the main intention is to drive headphones with up to 150Ohms on the go — Hidizs Sonata DH1000 would be a better choice. But in case if there is no need to carry such device in your pocket or if your headphones require more powerful output — Audinst HUD-DX1 Blue24 is the most powerful option with the highest sound quality.

V/S HiBy R6Pro (only sound & audio HW):

Pros:

• More extended and vivid treble
• Slightly more musical and less neutral
• Much higher power output (1.5W@32Ohms)
• 6.35mm output
• TOSLINK
• Superior ASIO driver

Cons:

• Treble is less accurate
• Mids are less thick
• No LDAC, UAT Bluetooth codecs
• No balanced outputs

Conclusion:

Korean engineers behind Audinst brand has clearly shown what a mature flagship DAC&AMP should be. HUD-DX1 Blue24 is a mighty device with clever audio hardware design, outstanding power output specifications and driveability, glitch-free and reliable operation in either of the numerous usage scenarios. Even the driver from German audio software develping company was adopted to utilize the full product potential. Such qualitative approach is creating much more value and satisfaction for the potential customer in contrary to focusing on quantity and forgetting to polish the product prior to its market release. Guess which one would have a longer life-cycle and which brand would win more from the recurring customer interest? Audinst has taken the right route and delivers the best experience out of the box. HUD-DX1 Blue24 is fully functional high-quality audio device with no compromises. Highly recommended as a desktop DAC&AMP to drive the loads up to 600Ω, to provide best audio quality to active speakers or act as DAC&preamp for home audio system.

You can buy Audinst HUD-DX1 Blue24 on Ebay

Also available at Audinst offical store

Official Audinst website

World goes wireless. Despite the resistance of true audiophiles towards it and lower sound quality in overall — most of us would still end up with over-the-air headphones, eventually. The choice between having the best possible SQ and the most convenient type of use is always leaning towards the latter. With the development of the latest lossless BT audio codecs many audio fans would also give up to unravel the wire. For me, personally, listening sessions and simple musical content consumption are two completely different disciplines — first requiring audiophile grade sound over wires, while the other is more about the universal use. Truthfully speaking, after having tried X1 — first BT wireless IEMs by a respected TFZ brand — my search of IEMs for everyday use, content consumption and phone conversations is over…

TFZ X1 available at PenonAudio store

TFZ X1 technical specifications:

• Driver type: Balanced Armature
• Frequency response range: 20Hz — 20000Hz
• Bluetooth version: BT5.0
• BT codecs: A2DP AVRCP HFP SPP PBAP
• Bluetooth distance: ≤20m
• Intelligent noise reduction
• IPX7 waterproof
• Call time: 5-7hours
• Charging case battery: 2600mA
• IEMs recharge in case:  15 times
• Earphones battery: 3.7V 60mA*2
• Charging time: ≤2 hours
• Mic: -42db
• LED light color: Red-blue
• Additional functions: memory matching, automatic interconnection, binaural calls, volume control
• Size: 76x30x45mm
• Weigh: 4.6g

Packaging, design and build quality:

TFZ X1 comes in a white box with TFZ brand  and product name printed in metallic blue at the front. Back side contains product picture, all available color options and your current choice. Box is heavy… Much heavier than you�d expect from a pair of IEMs.

Inside the box there is a layer retaining X1 case and covering the rest of the accessories.

Box contents:

• TFZ X1 IEMs
• X1 case
• MicroUSB -> USB A cable
• 8 pairs of silicone eartips
• user manual

Case is not only for storing but also acts as a charging cradle for X1 IEMs. It is a masterpience from any standpoint: design is beautiful, build quality is perfect, made of annodized aluminum… I can continue this list forever.

This cradle plays an important role — it is the only charging option for X1, provides up to 15 full charges and secures IEMs from damages, scratches or loss. It has foldable structure with smooth functioning reliable aluminum bracket and top cover retaining magnet.

Inner part is made of precisely molded plastic, has special IEM cavities with the magnetic charging pins. Therefore, IEMs are also secured inside the cradle with the magnetic force — charging continues even if the cradle is placed upside down.

Cradle is quite heavy due to 18650 cell (or something similar) under the hood and makes a feel of cold and solid device in your hand. Funny thing that it seems that I love the cradle more than I like the complete product, at least — aesthetically.

X1 shells are made of two parts: plastic top cover and a base. Top cover shares the same color and rough surface with the cradle. Such elements as white TFZ brand name prints, LED indicator, microphone opening + counter mic opening and two buttons per channel are situated there.

Sound output nozzles are a part of the base and protected by aluminum grills. Base also contains 3 magnetic pin pads for charging. Of course, no cable ports are available (wonder when manufacturers would start to use this idea — providing both types of connections — wireless and wired — in the same IEMs).

Fit:

My first experience with wireless IEMs (for example Xiaomi MI Mini) was not that great due to terrible fit. First — I couldn�t find the best eartip or position, worring that I would loose it one day.  It also produced some vacuum effect and caused the headache after couple of hours. Since than, I have decided that wireless IEMs should consit of L|R channels instead of using mono devices and that the ergonomics must be close to perfect. TFZ X1 is a good choice for me. Stock set of eartips allows to have a secure fit, shape is quite comfortable and the weight is totally ok. At least, X1 is not trying to jump out. I have already spent 2 weeks with X1, doing common tasks — no pain, no loss, not even a single attempt to be lost. Having 2 channels solves the problem of headaches when your brain (or third ear) cannot adapt to the vacuum effect on only one side. The only problem that is common for wireless IEMs equipped with the buttons — button press is not that easy and would push the output nozzles deeper inside the ear channels. Good practice is to switch to sensor type button like used in similar AKG IEMs.

X1 in operation:

Charging the cradle takes about 3 hours if IEMs are out or fully charged. There is a microUSB charging port located on the right side of the cradle and small red LED indicator to inform of the status.

Another green|red LED is located inside the cradle, between the charging cavities. This LED informs about the charging state of IEMs. Since the battery in each channels is only 60mAh — charging is done quite fast and IEMs are ready to be used for another 7 hours.

Moreover, it is not necessary to use both channels simultanously. If using it as BT hadnsfree IEM for the phone calls — either one could do the trick while the other rests in cradle. Literally, this doubles the battery life for phone calls and reaches up to 14 hours. And, what is most important — there is a certain software logics behind that: if you take out only one IEM from the cradle — it powers on and connects to your phone in mono mode. If taking out both — both channels would be functional. If you would like to take both IEMs out and use only one — just switch the other one off with the help of the power button located on each of the channels…

Just to summarize possible usage scenarios:

• a set of X1 IEMs could be used for regular stereo audio or binaural phone calls
• either one channel can be used for music or as BT handsfree unit in mono mode since it has own buttons, battery and two mics
• charging can be done simultanously for both IEMs + cradle, separately for each device or in any other combination

Pairing with the regular Android-based smartphone happens very fast, charge level is available in the status bar upon connection, operation is smooth and totally glitch-free. Didn�t notice any problems, unexpected disconnections, radio interference or other bugs during two weeks of heavy everyday use.

Maximum volume level is more than enough in comparison to regular type of BT handsfree units by Jabra, Platronics, etc. BTW — there is a female voice with language options that informs about the working and charging state of IEMs.  Information about switching to different language is located in the user manual.

Working distance that X1 is capable of is ~20m in openspace and ~10 meters in highly crowded office area. That are the best figures that I�ve managed to acquire.

Sound quality:

I would not go deep into details here. Why? Because I treat TFZ X1 as convenient BT handsfree unit with the possibility to play music whenever required. Furthermore, the list of BT audio codec doesn�t include the most advanced ones such as aptX, LDAC or UAT. It means that audio quality would always hang behind good and wired IEMs.

Anyway, the impression about the sound quality is very positive, in overall. Even despite the absence of lossless codecs, TFZ has managed to provide clear, balanced and detailed sound that perfectly hides wireless nature of X1 IEMs. Lows are well-exposed, don�t stand out too much, mids are full-bodied and detailed, treble is kind of limited in extension but still clear and enjoyable. Most of the clarity, detalization and overall balance comes from the choice and tuning of good BA drivers.

Dynamic BT IEMs would usually sound worse due to multiplying the initial flaws of wireless encoding and transmission (interference, noise, limited treble extension, limited resolution). BA drivers, instead, help to mask out most of the problems and provide mostly pleasing experience even for an experienced person with trained ears like me. Haven�t noticed sound being harsh, moody or unnatural. Everything is smooth and enjoyable.

One more important thing to mention in SQ section is the quality of voice calls. TFZ X1 shine in that — noise canceling function work very well in various conditions. Even if you drive a car with the opened window — the other party doesn�t have any problems hearing what you say. At the same time, the voice of the other party is always clear, natural and loud. This is the best BT unit for voice calls so far, if to compare to similar products from Xiaomi, AKG, Samsung, etc. Usually, such devices would suffer much more from voice interruptions, radio interference and other unexpected audio problems.

Conclusion:

What I like about TFZ company is that they don�t try to release raw product before conducting all necessary tests. X1 IEMs is a quite sophisticated and mature product in terms of build quality, usage scenarios, firmware stability and solid user experience. Can�t tell that its main purpose is to satisfy the audiophiles but it perfectly fits the demands of everyday use. Voice calls are clear, noise free and stable. Even the resulting music quality of regular BT codecs is compensated by the rich and detailed sound of high-quality balanced armature drivers. No surprise why TFZ X1 became «indispensable» assistant for me since the first day of use. Surely, this product would carry on helping me out in different situations in future.

TFZ X1 available at PenonAudio store

It is really interesting to observe how the most active brand names grow as the time passes. The most enterprising and active ones join the rank of trendsetters in the related industries and spread their influence over the entire conglomerates of manufacturers and customers. Examples are not that numerous but there are some apparent and unarguable cases for the past several years: DJI with their drone technologies, Apple that is constantly changing trends, Tesla that shifts the world to green car energy and so on. Those companies are shifting the mountains of past beliefs to expand the boundaries of future expectations. Same happens in a smaller scale where fastly growing companies would also strive for better technology and standards. Just think of new graphene batteries, flexible displays, use of modern materials and large amount of Internet services that are accepted by mass market as new standards.

Now, lets narrow down to audio domain. De facto, HiBy has already joined the vanguard of the pushing force in this industry. This brand has started with HiBy Music application for the most popular mobile OS, introduced widely used functions like MSEB and HiBy link. They have also created and licensing their HiBy OS firmware to different manufacturers (doesn�t this reminds you of Xiaomi brand history?). One of their recent valuable deeds is the development of several HiRes DAPs with the superior price to performance ratio that forced a new spin of competition among all industry members. ‘

Today, we would like to demonstrate that HiBy has other trumps up their sleeve by presenting HiBy W5 — the world�s first Bluetooth DAC/AMP receiver with UAT (Ultra Audio Transmission) codec that might set the new wireless audio standards for the entire industry.

HiBy W5 technical specifications and description:

• Type: Bluetooth audio receiver with integrated DAC&AMP
• Connectivity: Bluetooth 5.0 (CSR8675)
• Bluetooth audio codecs: SBC, AAC, apt-X, apt-X_LL, apt-X HD, LDAC, UAT
• Max. bit rate: 1.2Mbps
• Max. bit depth: 24bit
• Max. sampling frequency: 192kHz
• DAC&AMP chip: ESS Sabre ES9218P
• SNR: 118dB
• THD+N: -103dB
• Output power: 80mW+80mW@32Ω
• Audio output: 3.5mm
• Control elements: 1 sensor button + LED indicator
• Battery life: ≥20 hours (W5 battery + cradle battery), ≥100 hours at standby
  Quoted playback time based on using the AAC codec
• Compatibility: Windows, Android, iOS, MacOS
• Other features: intergrated mic for voice calls, IP67 waterproof, remote control by HiBY Music app
• Weight: 19.5g (W5), 57.1g (cradle)

Link to official HiBy W5 page

Let�s go over UAT and HW part: UAT stands for Ultra Audio Transmission technology that was developed by HiBy as new generation of Bluetooth audio codec superior to all previous standards ever presented by other companies.

Just a short comparison of main specs of the two latest audio codecs developed by Qualcomm (apt-X HD) and Sony (LDAC):

In other words, this table shows that HiBy has managed to take the advantage of Bluetooth 4.2/5.0 and overcome previous bandwidth limitations that didn�t allow sufficient data transfer speeds, consequently lowering sampling frequency. Of course, in order to to make this work HiBy had to develop its own algorithms and wrap it with Bluetooth standards. Moreover, this means that HiBy should have also developed and tested UAT for transmitting and receiving devices. This means integration with different operating systems and various microcontroller devices in future. Along with the codec, Bluetooth 4.2/5.0 is a must to get UAT working.

If to summarize all of this, theoretically, introduction of UAT codec together with the latest BT standard solve the issue of downsampling audio library, increasing data transfer rate that should improve audio quality and overall satisfaction of going wireless.

As far as we understand, HiBy might be pushing their innovation to different vendors right after confirming that it is perfectly stable. UAT supports any Android mobile phone with HiBy Music app and DAPs like HiBy R6, R6Pro, R3, Cayin N8, Hidizs AP80. Moreover, W5 is compatible with all currently available BT audio codecs and could be paired to any other audio source supporting Bluetooth. Therefore, you can use it with any DAPs or smartphones and enjoy all advantages of the latest wireless audio transmission technologies.

Let�s move on to the device itself, starting with the externals.

HiBY W5 packaging, design and build:

W5 comes in transparent box with the device secured by the special insert at the top part. Rest of the space is consumed by the accessories. Device name, brand logo and company contact information are printed on the inner cardboard layer.

Box contents:

• HiBy W5 BT receiver
• device charging cradle
• microUSB type-C -> USB A cable
• user manual
• final production versions of W5 would also have instruction manual and stickers on the left side of the box

Yes, in fact HiBy follows the trend and has developed special cradle for W5 the only purpose of which is to charge the device. It doesn�t mean that you cannot use it for storing or carrying W5 as it has the folding cover but the main idea is to use it as power bank whenever required.

W5 is quite small device with the dimensions of 61.7x21x17.6mm (with clip). Looks futuristic and intrigues by the absence of any control elements. Its smooth and elongated body consists of two parts — black glossy plastic top and brushed stainless steel bottom. Parts are perfectly aligned, no gap here.

Microphone opening is located at the bottom part of front cover. Steel back contains charging contacts and clip grooves.

3.5mm audio output is located at the top edge.

Plastic clip is detachable, feels quite secure and durable.

The most interesting starts when you try to operate the device (concerning that there is no physical control elements or screen). Upper part of top plastic cover is semitransparent and hides circle LED element combined with the touch sensor. Not easy to discover unless W5 is placed on its cradle for charging. Charging process would immediately reveal the position of hidden element by blinking with red LED. Let�s see how is looks (in this case it would blink blue due to fully charged state):

W5 cradle is not that mysterious but perfectly does the job. It is made of black glossy plastic, features foldable top cover with special soft insert to prevent W5 body from scratches and movements, spring-loaded W5 charging pins, 3 blue LED lights to indicate the amount of charge / charging process and microUSB type-C charging port. We�ve even managed to remove W5 bed from cradle and take a look at the HW part. Everything looks fine and neat:

HiBy W5 operation:

Charging process can be done in several ways:

• Charging only the cradle from USB power supply which takes approximately 2 hours from fully discharged state. Triple blue LED indicator on the front part of the cradle shows the amount of charge gained during the charging process. Cradle battery is 1000mAh LiPO.
• Charging both W5 and cradle simultaneously by placing W5 in its cradle when it takes charge from USB power supply. Charging time would change accordingly to the current state of W5 battery (+1h at most). W5 would also blink with its red LED to indicate charging process.
• Use cradle as power bank to charge W5 battery. In this case cradle LED would indicate how much own battery capacity is left and W5 red LED would blink as it takes charge. Cradle battery has enough capacity to fully charge W5 five times (W5 battery is 150mAh LiPO).

Here is LED indication pattern of the cradle:

Charging process:

And here is how the charging indication goes on W5 itself:

Unfortunately, it is not possible to use 3.5mm audio output of W5 while it is on charge due to the physical limitations of audio jacks connection while the device is placed in the cradle. At the same time, W5 stays fully operational… It seems that there is a room for physical improvement of the cradle or future mods by end users.

Controls:

While not very obvious from its look, W5 incorporates touch sensor button as multifunctional control key with «vibrate on tap» feedback. Sensor shares the same front face spot of the LED indicator. Feedback vibration force is pretty strong to confirm the action. As any other sensor type key it does exhibit a slight lag between the actual finger press and the resulting activity but it is totally acceptable and pretty comfortable to use.

Here is the list of all button functions:

Of course, W5 LED indicates different working state as well:

Pairing and working distance:

First W5 pairing is done by holding the button for ~5 seconds. It would initiate pairing process while LED indicator would be quickly flashing with blue color. No problems with discovering and connecting from the smartphone side. It would list HiBy W5 among other discovered or paired devices. First connection as well as all further reconnections after power cycle are almost immediate.

No problems either if your device is not supporting Bluetooth 5.0 standard as it is backward compatible with the previous versions and UAT is compatible with 4.2 version as well. But Hiby recommends to use Bluetooth 5.0 to get the smooth implementation

In theory, according to new standard specifications, working distance with BT 5.0 should be 4 times larger than in the previous version. In real life, smooth experience would greatly depend of the environment and radio band workload that might and would affect the amount of packets lost, especially with the higher data transfer rates. UAT codec features the highest data rate ever for BT audio stream…. Consequently, more prone to different types of interruptions. Our tests show that it is not a problem when you keep W5 and a smartphone in different pockets but might become an issue when you have to send data through 10 meters of working space with some obstacles like people, other transmitting devices, walls, etc. Therefore, despite new BT standard capabilities, you should expect smooth operation at the same working distance as everyone got used to before — ~10 meters at open space.

HiBY W5 applications:

There is a software part for W5 developed by HiBy for Android OS to provide more functions and better interaction. For now it is split into two different applications, both in beta state. Both would eventually merge with HiBy Music APP by the time of W5 market release. The compatibility of this software with other operating systems is yet to be declared (iOS compatibility is already declared).

Software part functionality:

• W5 settings:
  • Bluetooth audio codec
  • Sample rate
  • Bit depth
  • Current codec additional parameters

*this is similar to menu options found under Settings->Developer Options in Android OS. So, instead of sending people to activate hidden «Developer Options», HiBy has integrated it to its own software and already added UAT codec profile there. 

• W5 information: Name / MAC / battery level / battery status / RSSI / API version
• LED: switch W5 LED on|off
• Equalizer: BASS Boost / 3D / Presets (lets you use slots to store own presets)
• Remote control: buttons Volume UP/DOWN/Mute / PLAY/PAUSE/STOP / NEXT/PREVOUS. (Perhaps, the remote would be used with any default music application if you are not using HiBY Music)
• Battery: full information about the battery state and charging process
• Upgrade: W5 FW upgrade screen with file browser to navigate to FW file

Most of the functions are perfectly working already.

As already mentioned — all those functions would merge with HiBy Music app and let you control W5 receiver without the need of switching between different applications or Bluetooth system settings.

Sound tests: 

Testing process: Tanchjim Oxygen IEMs wired to Hidizs AP80 DAP or Xiaomi Note 5 versus  HiBy W5 connected to HiBy R6Pro DAP over Bluetooth (UAT and LDAC audio codecs). This gives us the understanding of how W5 sounds against one of the most popular DAP�s around.  

Lows and midbass:

Lower range is quite exposed and has very good deep bass reach. Not overemphasized, nor shadowing other frequencies but it�s presence is evidently large. Texturing is moderate, can�t quite compete with wired connection to DAP but totally fine in case of good IEMs and much better than produced by a regular smartphone audio output. Overall bass presence and extension influences the sound signature, giving a picture a warm presentation. In fact, if bass texturing were a bit higher — W5 might have been almost similar to AP80 DAP bass reproduction.

Midbass power and dynamics are very good. Drums sound good, rich and engaging. Seems that W5 amp section is having enough potential to drive anything up to 80Ω. Most of the IEMs are not a problem at all. The only full-sized headphones we�ve tested were AudioTechnica ATH-M50 (48Ω) which also produced good results in terms of midbass dynamics, speed and articulation.

Mids and vocals:

Mids are little bit laid back in comparison to lows and treble. Voices are perceived as a bit thin and distant with not much of difference in presence between male and female vocals. There is a slightly warm timbre influenced by lows and this also helps to have a good control over lisping or harsh notes. Resolution on voices is moderate while string instruments are showing slightly better results. In overall, mids sound pretty intimate and warm, with smooth sound transitions. Even though, the clarity and dualization of mids is higher than Note 5 smartphone can produce on its own with wired connection.

Treble:

Treble section is slightly emphasized and brings up the additional clarity and imaginary resolution to the sound. While the extension is less than with wired type of connection, treble amount of presence still manages to balance the lower end. Resolution is moderate here as well. Such situation is common for all BT audio receivers as the most of noise floor and audio downgrades are affecting our perception of extensions on both ends, also reduces clarity on treble.

Sound in overall:

In fact, HiBy W5 sounds very good when advanced BT audio codecs are used. Some lack of resolution or texturing gets evident only in the direct comparison to wired method of connection to good DAPs. This is perfectly logical. On the other hand, only few smartphones, tablets or PCs would come close to W5 audio quality level and driving potential even with wired IEMs. Let�s say that W5 as a DAC/AMP is much better than regular smartphone bare audio output while the wireless method of sending data is not making it much less superior.

Definitely, we can tell the difference between using wired connection to DAP or smartphone and sending data over the air to W5 BT receiver. The main difference is higher noise floor and the latency (which is actually not that big to disturb from watching video content). At the same time, while wired DAP is inarguably providing the best sound quality to your IEMs, the results produced by vast majority of multifunctional devices (such as regular smartphones with no dedicated DAC chip) would fall short in terms of output power, driving potential, overall clarity, resolution and instrument separation. Therefore, those who use their smartphones for music would gain the wireless freedom together with the better sound quality in overall. More experienced audio geeks who possess good piece of equipment and searching for wireless receiver would not be disappointed either, as the difference in sound quality between wire and BT is not that obvious.

UAT V/S LDAC sound quality:

Honestly — hard to tell. When LDAC is set to its maximum data transfer rate of 990Kbps the only difference is that all of your >96KHz tracks would be downsampled to 96KHz. Roughly, it should result in less accuracy and extension, especially on treble. But the main question is whether this difference is audible… There are some people who would pretend to hear the difference between codecs but most of the blind tests show very small rate of success, if any. Therefore, we would say that the main advantage of running UAT instead of LDAC is a pleasing  notion of the fact that nothing is being downsampled and you get the best possible audio quality. Why would you spend so much efforts finding 24bit/192KHz albums than?

At the same time, sound improvement between the basic SBC codec and anything that was designed to do much better job (aptX_HD, LDAC, UAT) is apparent. At least for the trained ears of long-time audio equipment reviewers and musicians. Sound is not that dry and narrow, overall resolution is higher, both ends are more extended, you get more micro dynamics… IMHO.

Sound quality in voice calls:

Haven�t noticed any issues during the voice calls. W5 microphone sounds clear and pretty loud for the other party. Echo effect was not observed either. There is also a possibility to start, dismiss or end the call with sensor button.

Compared to Colorfly BT-C1:

Colorfly BT-C1 is very good and neutral Bluetooth receiver in terms of sound quality. It also can be used as USB DAC which is its main purpose, actually. It is not very convenient to be carried around in your pocket, doesn�t have that good battery life and lacks the output power (only 35mW@32Ω). The most advanced BT audio codec is represented by Apt-X_LL. Sound wise, BT-C1 is more gentle and more resolving across the AFR but at the same time more dry and much less fun to listen to. Adding here its low driving potential — and it is not getting anywhere close to HiBy W5. We would say thay BT-C1 should be considered only for stationary and wired use in combination with active speakers or as a DAC for home audio system. HiBy W5 is more universal in terms of usage scenarios, sounding brighter and more engaging, having more driving power and using better BT audio codecs.

Conclusion:

After examining early sample of HiBy W5 very closely, we can conclude that it is the most advanced and, in fact, a revolutionary Bluetooth audio receiver. Apart from traditionally capable hardware, great design and solid user experience, HiBy has presented the world with their own vision of supreme Bluetooth audio quality. They have taken the lead by the development of 192KHz Bluetooth Ultra Audio Transmission codec which, perhaps, would emerge into new industry standard. It also means new spin of competition on the market with further technical advance and benefits to all audio fans. Such innovations and related efforts should be supported by all possible means, that is why we would be standing in a first row of crowdfunding campaign when it would be launched.

Link to official HiBy W5 page