Small but mighty – this is the only phrase that comes to my mind after using USB type-C dongles of this kind. This time it is Hidizs SD2 – the newest USB dongle that is designed to squeeze more juice to drive headsets to the appropriate levels when compared to the integrated sound amplifiers. It is not the first take of Hidizs on dongle DACs and by this point they have quite an experience and knowledge to design tiny, yet powerful DAC&AMP. Although, there were always pros and cons of using such devices which would be described in this article.

Hidizs SD2 has been released to public only couple of days ago and the first 200 units would be sold at special prize (31,99USD).

Link to the official Hidizs store: LINK

Link to Amazon store: LINK

You can use ZMCR5OFF as 5% discount code.

First, specs&features:

As seen from the specs, SD2 is compatible with all types of devices out of the box, supports PCM32bit/384kHz sampling and DSD128, as well as in-line remote and mic. Therefore, it not only brings back 3,5mm jack output to all of the devices free from it by the hand of marketing managers, but also gives the possibility to enrich sound quality and use your phone functions in the most convenient way. Hidizs also claims that the sound has zero delay what makes it possible to watch videos and play games apart from listening to music.

Box contents:

Apart from the SD2 itself, you’d get USB A -> type-C adapter and Lightning -> type C adapter which covers most of the possible variety of modern devices. If I am not wrong, this is the first time when Hidizs adds lightning adapter to the bundle and makes this device fully compatible with Apple smartphones out of the box.

Design, fit and build quality:

SD2 is really small. Much smaller than most of the USB type-C dongles available from other brands. It is only 20×34,5x10mm in physical size and designed in such a way that 3,5mm output comes out of the case at 45 degrees angle. This clever design serves two roles: type-C port side has enough surface length to press against the device and eliminate side flex and headphones output brings the jack closer to the source device, making the load shoulder even smaller. In real life, SD2 sits quite securely at place and doesn’t make me feel that it would destroy type-C port of my phone. I can’t say that such hard-type of connection is better than using a cable in-between, but the connection itself is stronger than I thought it would be. On the other hand, such connection would depend of the type of bumper or case that is used with the smartphone. If it is thick and soft – SD2 would not feel that tight.

Device in use:

SD2 is designed to work straight forward out of the box – connect it to any source like Android smartphones or tablets, Windows PC or Apple smartphones and it should be recognized by the system as USB audio device. Furthermore, such apps as HiBy Music on Android would also recognize it as bit-perfect device to bypass system audio mixers and send data directly to USB.

Common for all Hidizs devices, SD2 shows incoming audio quality with different LED colors: red for PCM 44.1-48kHz and blue for PCM 88.2-384kHz & DSD128.

While using this device there were no noticeable lag in audio while watching movies, neither there was case heating or extraordinary fast smartphone battery drain. Seems that Hidizs did a good job on optimization on internal circuits.

Sound wise, first what I was after is the capability of SD2 to handle full-sized headphones such as Audio-Technika ATH-M50 and Logitech Astro A10. First is pretty tight closed back with 50Ohms impedance, second ae the gamins ones with a mic and 32Ohms impedance. All driven from Xiaomi Redmi Note 8Pro smartphone which is not great at all on its own 3,5mm headphone output. Not great means that it feels anemic, low powered, artificial, with smeared highs and soft on mid bass when trying to drive such types of headphones… SD2 definitely nails it and is capable of driving both at much more appropriate levels, bringing the life and juice to mid bass, much better clarity of treble, together with higher volume in overall. Music starts to feel more engaging and transparent, when each instrument has its place and room. Layering and imaginary scene gets better. And all of that is apparent, no need of recurrent tries. In my opinion, SD2 is doing much better that integrated dac/amp of this particular smartphone.

Conclusion:

It is great that we still get the possibility to have 3,5mm headphone output in almost any device despite the decision of marketing that it is no longer valid for the end-user. Denying the will of having higher audio quality on wired headphones or IEMs and forcing to be content in bluetooth boundaries is more about making more profit on more expensive devices, rather than providing the best quality or unleashing the potential. It is great that there are such product as Hidizs SD2 that bring back the possibility, functionality, compatibility, quality and passion… SD2 is one of the smallest, yet capable devices that makes wired headphones useful again, while overcoming the shortcomings of the integrated circuits.

Link to the official Hidizs store: LINK

Link to Amazon store: LINK

You can use ZMCR5OFF as 5% discount code.

Not very common review today since it consists of two interesting units from the same brand – Hidizs. This brand has been quite active and brought intriguing and worthy stuff for the past couple of years. Their latest MP145 planar IEMs made some noise before the launch and early bidders have already started to receive their parcels and supply own very positive impressions.

Glad to see that the feedback on the sample items the reviewers have shared this summer finally turns into pleasing satisfaction of Hidizs customers and supporters and the campaign turned out a success in overall.

This time I’d share my experience and impressions of spending several weeks with Hidizs S9 Pro Plus USB DAC|AMP dongle and the latest SDD IEMs – MS1 Galaxy. And since the devices create a great pair, I’d review those together in one article, starting with the dongle.

First of all, S9 Pro Plus (codename “Martha”) is a successor of the previous versions of S9 lineup: S8 -> S9 -> S9 Pro -> S9 Pro Plus. Currently, Hidizs is pretty strong in such devices and has a long list of dongles: S8, S9 series (3 devices), XO, S3 Pro. Previous S9 dongles were widely reviewed and commonly placed on top among similar products of other brands and S3 Pro even has been mentioned in New York Times as the best budget pick. Back to S9 series…

Personally, I would say that S9 Pro Plus is a direct successor of S9 Pro whereas the original S9 is a standalone product. The main difference is that the original S9 is built on AKK DAC while S9 Pro and the newest Plus versions share similar ESS ES9038EQM DAC chip. Here we can see all the difference:

Despite that architecture of S9 and S9 Pro is different, their design and some features are more similar to each other than between S9 Pro and S9 Pro Plus. Plus version now offers 4.4mm BL & 3.5mm SE ports instead of 2.5 + 3.5 combination, it now features physical buttons, different design layout and additional switching filters. And on top of that there is more than 30% gain in power comparing to the original S9 version.

Full S9 Pro Plus specs:

• Dimensions: 55×25×11mm
• DAC Chip: ESS9038Q2M
• DSD: Native DSD64/128/256/512
• PCM: up to 32bit/768kHz
• Outputs: single-ended 3.5mm and balanced 4.4mm
• Sampling rate indicator: yes
• Shell material: CNC integrated aluminum alloy
• Function buttons: 2
• Switching filter: 7
• USB interface: Type-C
• OS compatibility: Android, Windows, Mac OS, iPad OS, Harmony OS (Please note: a Lightning to Type-C cable with OTG function has to be purchased separately to support iOS)
• Net weight: 17g
• Colors: Black, Sliver, Blue
• Packing list: Type-C to Type-C Cable×1, Type-C to USB-A adapter×1, User manual×1, Warranty card×1

Audio:

Under 32Ω load:

• Frequency Response: 20Hz-40kHz
• Distortion: PO (3.5): 0.0019%, BAL (4.4): 0.0008%
• Signal-to-noise ratio: PO (3.5): 123dB, BAL (4.4): 120dB
• Separation: PO (3.5): 75dB, BAL (4.4): 115dB
• Output power: 138mW+138mW SE 3.5mm, 180mW+180mW BL 4.5mm

What has also changed is the design of the box – it became significantly smaller and features hard case with soft insert now instead of cardboard in previous dongles. Comes with the device itself, one USB type C -> type C cable and the additional USB A -> type C adaptor for older PC or Mac that don’t have type-C on board.

S9 Pro Plus has the dimensions of 55x25x11mm, consists of the aluminum chassis with front and back glass panels. Design is resembling all Hidizs products with its sharp edges put under different angles.

Another heritage is Hidizs logo at front which also acts as RGB LED indicator for sampling rates and different sound filters. Looks beautifully when active but I wouldn’t call it informative. I would prefer slightly more expensive dongle with OLED screen and full information about rates, filters and track quality. Anyway, here is the list of LED colors and their meanings:

Sample rate indication:

• Yellow: DSD 64/128
• Purple: DSD 256/512
• Blue: PCM 176.4/192(kHz)
• Red: PCM 352.8/384(kHz)
• White: PCM 705.6/768(kHz)
• Green: PCM 44.1/48/88.2/96(kHz)

Filter selection (pressing 2 buttons simultaneously during playback):

On the right edge we have 2 physical buttons now that are responsible for 2 functions: Volume and Filter. Pressing one button increases or decreases the volume respectively, while pressing two at once would change filter mentioned above. Each press of 2 buttons scrolls to the next filter and there is a change in LED color to identify which filter is currently active. Changing volume with dongle buttons is quite discrete and sometimes it is better to control volume from a source in order to get some preferrable values in between.

Top edge of the device contains 2 ports: 4.4mm BL Pentaconn type and 3.5mm SE. Since the technical design of S9 Pro Plus claimed to be fully balanced – BL port provides the maximum potential in terms of output power and sound quality. 180mW/channel is pretty high figure that is not expected from such a tiny device. Just for example: the most advanced Hidizs AP80Pro X DAP has 70mW per channel on SE and 190mW per channel on BL outputs which is much lower on SE and only ~5% higher on BL in comparison to S9 Pro Plus dongle. This is despite the fact that AP80 DAP is much larger, has its own LiON battery as power buffer and much more space under the hood for its schematics.

Bottom edge contains type-C USB port which is compatible with PC, MAC, Android and current iPhones with type-C ports. There is also Lightning to type-C adaptor that can be purchased separately to connect to the older iPhone versions. For Windows, there is a dedicated ASIO driver available on Hidizs website. Having such driver on PC is crucial for the best audio experience as it bypasses system mixers, utilizes bit-perfect stream and opens sampling rates up to 32bits/386Khz under driver properties to avoid the additional resampling.

This type-C port also used to upgrade S9 firmware, although I don’t know whether it would be available for public. I have been provided with the firmware upgrade for my early sample that replaced track switch function with volume buttons when dongle is connected to PC to its direct function: volume change. I assume that all final version devices would already come updated. But if interesting: FW change requires PC connection, PID finding and adding to special FW update app plus the FW hex file to push it to the device. Takes about 5-10 seconds to finalize, restart and get back to music.

In respect of the sound I can state that S9 Pro Plus is a huge update to a regular audio output of general Android, iPhone, PC, Mac or tablet; some addition to the previous S9 Pro version and make some subtle difference when compared to AP80 Pro DAP. Any regular phone or PC sounds less powerful, has notably lower mid bass slap, less layering and instrument separation as well as less resolution. S9 Pro Plus adds the clarity and defines the stage better, provides better control throughout all frequency range and is able to drive IEMs and headphones to a better extent. In comparison to S9 Pro, the newer dongle adds slightly in gain, mostly notable at mid bass and can provide the additional preferences when switching between different filters. Filters do behave differently, adding / subtracting from the mid portion and making the sound less / more balanced. In case with AP80 Pro DAP found some difference in resolution (AP80 Pro sounds more crisp) but this is quite subtle. I would say that S9 Pro Plus and AP80 Pro sound on par if certain filters are chosen on S9.

To summarize: I am impressed with the performance of Hidizs S9 Pro Plus USB DAC|AMP in most possible ways. It is small, lightweight, universal for most of the devices, has unexpectedly huge power output and sounds close to AP80 Pro DAP. It is quite and addition to upgrade the sound source in our pockets and can even be used in the desktop setup if larger and more expensive stationary items are not an option. It might been lacking more informative screen or smoother controls but it definitely doesn’t suffer in audio quality.

If Hidizs S9 Pro Plus is interesting to you – here is the trick how to get it with the lowest price possible: the preorder for S9 Pro Plus in Hidizs official online store would start on November 16th, 2023 (9:30AM EST) and would end on Nov 30, 2023 (9:30AM EST). During this period first 100 units would be sold for 69,99USD and the rest for 79,99USD. You can also additionally apply our special 5% discount code: ZMCR5OFF (code would be available from Nov 15, 2023 12:00AM CST). Preorders would start shipping from Dec 5th, 2023.

Now, back to the newest least expensive Hidizs IEMs – MS1-Galaxy.

Similar to S9, MS1 Galaxy are not the first single DD budget-friendly IEMs by Hidizs. There were MS1 Rainbow and Seeds preceding Galaxy and I still honor Seeds as one of the best single DD IEMs with very accurate and delicate sound. Unfortunately, those have been discontinued and had one huge drawback – integrated audio cable. I even had 2 versions of Seeds at once – SE and balanced to switch between the sources. Therefore, Hidizs has the expertise to design and build good budget single DD IEMs.

MS1 Galaxy specs:

– High-Performance Dual Magnetic Circuit Dynamic Driver
– 10.2mm PU+PEEK Composite Diaphragm
– Optional Inline Control & Microphone
– High-Density German Makrolon Resin Shell
– Silver-Plated Oxygen-Free Copper Wire
– 0.78mm 2-Pin Plug
– Ergonomic Liquid Silicone Ear Tips
– Ergonomic Design with Comfortable Extended Wear
– Perfectly Aligned With The H-2019 Target Frequency Response Curve
– 3.5mm Gold-Plated Plug & Durable Metal Shell & Splitter
– Hi-Res Certification

FR Graph:

MS1 Galaxy comes in a small white box with the design and graphics resembling anime culture what makes them a desirable gift for younger generations. My 14 years old daughter spotted it on my shelf and tried to free me from this pair at day one after its arrival. I am not a fan of anime, but still the design is fresh and unique to my liking. Even my wife was starring at the box and IEM shells despite staying far from this hobby.

Box includes IEMs, 3 pairs of silicon tips, audio cable and some papers.

MS-1 Galaxy shells are made of transparent resin which already draws the attention. Front facing plates shine with different colors and remind of diamonds or stars. Cable ports and sound nozzles have golden finish and add to the entire aesthetics.

Chambers, cables and driver combination inside look accurate and neat. Sound output nozzles are covered with aluminum mesh for the additional dust/dirt protection.

Cable looks similarly gorgeous: silver braid in transparent isolator with aluminum housing on gold-plated jack and resin housing on 2pin IEM contacts. Additionally, it has ear guides formed of transparent heatsink material.

Nothing to be worried in terms of fit since the shape is the most universal for the majority of people, nozzles are quite long and ear guides secure IEMs and cable at place. Choice of ear tips is limiter to 3 sizes and only one material but the diameter is common and most of the aftermarket products would fit nicely if needed.

Now, the sound… I’ve tired MS-1 Galaxy with different sources: AP80 Pro DAP, tablet, PC, S9 Pro Plus DAC/AMP and my Android Xiaomi smartphone. In all cases the sound can be described as tending to warm with large bass presence, juicy mid bass, slightly recesses mids and fairly accented treble. Lows and mid bass are the strongest virtues of MS-1 Galaxy. Great presence, good texturing, good control and layering here. Mid bass has good dynamics. Mids are slightly less resolved and slightly pushed back. Male vocal sound pretty rich and natural whereas female vocals might suffer from hisses and sibilance with less capable sources (smartphone, for instance) and low quality tracks. The better the source is, the less this tendency to hiss is pronounced.

Treble, in its turn, is completely enough in presence but lacks in clarity and transparency. In overall, MS-1 Galaxy with its virtues and imperfections in sound still up ahead of many budget IEMs that passed through my hands and builds the impression of good musical IEMs. Perhaps, its warm signature creates this charm which goes smooth and easy on my ears. I would prefer such type of tonality over crisp and cold when it comes to everyday use. Furthermore, its signature fits ESS-based sources well, making the sound softer and more velvet-like while maxing out the resolution which the driver is capable of. But I wouldn’t use it with AKK-based sources or with tubes cause the sounds starts to feel a bit muddy.

In overall, Hidizs MS-1 Galaxy is a good budget IEMs, great for those who like bass and warm tonality and less interesting for analytical or precise listening. It wouldn’t irritate throughout the day, neither with its fit, nor with the harshness in sound. It feels warm, flowing and smooth, like lounge music that plays on background all day long, suitable and pleasing for everyone. Strong contender, with its pros and cons, excellent build quality, universal fit, relaxing sound, at very low price.

Hidizs MS-1 Galaxy already available at Hidizs official online store: LINK

The use of the magnetic planar technology in IEMs is still on the early stage of the development. Rare products, small lineup, weak fan base and lack of the mass market awareness. For now. Although, the technology itself has a lot of potential in addressing known issues with the most popular driver types in terms of the sound quality. Planar drivers are fast, use large-sized membrane, have even response across the whole active area and better controlled from both sides by the magnets. Sonically, it means more resolution, better transient response, better separation, layering and clarity. This is in theory, in comparison to dynamic drivers. Main advantages over armature drivers is its size which results in more body and bass potential of IEMs. Also in theory…

Time has come for Hidizs to stand inline among few other industry-leading brands in their attempt to prove planar driver advantages in overall, as well as their new product superiority. I am talking about MP145 – first planar-based IEMs by Hidizs.

Before we start, it is important to mention that MP145 design was inspired by and created in a partnership with Whale and Dolphin Conservation (WDC) (the leading global charity dedicated to the protection of whales, dolphins, and their ocean homes).

Hidizs MP145 technical specifications and features:

Let’s say that the most interesting part is that MP145 are based on 14.5mm planars + have 3 pairs of additional tuning filters. This seems familiar from hybrid IEM world, but something new for planar IEMs. The declared impedance and sensitivity combination tells us that, in case with MP145, high power output is not a mandatory requirement. Hope that Hidizs AP80 gen.1 would be capable of driving these with 3.5mm power output. Consequently, we have two options of cable to choose from while ordering: 3.5mm SE and 4.4mm BL. My version is 3.5mm SE since I would like to check upon the aforesaid statement about power and sensitivity. Pity that Hidizs is still haven’t incorporated a cable with the exchangeable type audio plug for its IEM products (2.5mm BL, 3.5mm SE and 4.4mm BL).

The packaging, set and design:

In contrary to the latest hybrid Hidizs products, MP145 box is pretty small and what is more interesting that it is made of plastic. There is a cardboard outer cover with prints and hard box made of recyclable materials and designed specially for those IEMs. Perhaps, new box is developed to differentiate this product and to show that is belongs to more expensive class? Anyway, the box does a great job of protecting the internals which consist of foam inserts holding IEMs, 9 pairs of silicone ear tips and one extra box with the cable, set of filters and some papers.

Glad that Hidizs seems accepted such a rich set of accessories common to their latest IEMs. Apart from IEMs you’d get:

• 9 pairs of silicone ear tips (3 pairs x 3 sizes for bass, same for balanced and for treble)
• 3 pairs of tuning filters (1 pair for bass (rose), 1 pair balanced (gold) and 1 pair for treble (silver))
• 3,5mm SE or 4,4mm BL audio cable with protective cap and velcro strap (cable version type chosen during the purchase)
• carrying pouch

Again, want to mention for Hidizs that it would be a great advantage if a cable with the exchangeable plugs would come as a standard in future for all of IEMs. People use different kind of equipment and it is kind of tough to choose which type of plug to order. The more universal it would be – the better is the impression of the product in overall and more frequent would be its usage in real life.

Tuning filters also come in separate tiny transparent plastic storage box and here is one tip: don’t try to pull it apart, you should turn upper or lower part to around 15 degrees first in order to open this box.

Carrying pouch has the new and more convenient type of retaining mechanism (first seen in MS3 IEMs) when you have to squeeze both ends with the fingers to open it. Good.

Now, about the design and materials of MP145 IEMs: first impression when you take it in hands that those are pretty big and heavy. Solid piece of CNC processed aluminum, resembling whale tail in the design of the facing plate, with some openings, compensation hole, 2pin cable connector and pretty long output nozzles. Nozzles are ending up with the thread for tuning filters. Looking inside the opening – there is no protective mesh but I could see some foamy material deep inside which I believe acts as dust protection and damper.

Aluminum mesh is a part of the tuning filter which cuts some frequencies and acts as the additional dust protector as well. The only reason to worry about wearing those during the workouts or under the rain is the opening on the faceplate that would let water inside. Build quality is excellent in overall, no gaps, solid feel.

For the first five minutes I thought that the fit is kind of compromised by the size and weight of MP145 IEMs. Fortunately, got used to them afterwards and lost any disturbing feel. I can’t say that those are the most universal IEMs in terms of fit and I wouldn’t try to have them on during the workouts but quite comfortable for regular walk and totally good for calm listening sessions.

Finally, the sound:

First to mention – it is unexpectedly huge bass for planar IEMs. Usually, planars suffer from underpowered lows due to technology limitations in combination with high demand on power but Hidizs has managed to solve both issues. Lows are well exposed, adding the base, body, thickness and warmth across the entire frequency range. To the extent that MP145 can be labelled tending to dark/warm sound signature. Besides, lows that we have here are perfectly layered to the additional sub-ranges, have quite notable texturing and pretty fast decay. Together it builds a feel of large but very accurate bass with outlined boundaries and no blurring. Mid bass sounds juicy, powerful, tight and fast. All of that on 3.5mm SE from Hidizs AP80 first gen DAP (set to HIGH gain) only capable of 70mW@32Ohm/channel + balanced tuning filters. This is a win, I assume. Prior planar IEMs I dealt with such as Dethonray Tender 1 and 7Hz Timeless, decent as well, were more hungry for power and required more advanced DAP or even tube amp to disclose their potential.

Consequently, the mids have this sweet thickness and body that makes the sound so smooth. Resolution is not overexposed comparing to high-quaity armature drivers since there is more influence of lows on mid section, but the timbre, presence, layering and separation are all excellent what puts MP145 above its armature rivals which sound thinner, colder and more artificial.

Treble have less weight of all the ranges, maintaining the balance and adding to detalization but it is not accented here. In fact, its performance and amount depends of the song, recording and quality but if we take some composition with normal levels, high dynamic range and high quality recording – treble is on the sweet spot between its clarity, amount and transparency, never getting shouty or piercing, nor feeling underpowered. Some further changes of adding\cutting off treble response can be applied using the additional tuning filters (silver – more treble, red – least treble). And yes, MP145 are a bit sibilant-tending but again, this only been observed on some treble-saturated, not-that-good quality records which already tend bright/cold timbre.

What also shines is the separation/layering across the entire range. Each sound has great clarity, each instrument is outlined. Planars definitely win in this respect over hybrids or dynamic drivers which tend to mix or blur the outlines more.

Conclusion:

Magnetic planar-based IEMs are still not that widely spread in comparison to dynamic or armature rivals, which is a fact. Perhaps, 27-40 products in overall offered by the most popular online audio equipment stores. Subtracting some evident crap from this number and we end up with a very small selection to choose from. But even those that are left, having decent sound quality, are known for its complexity in driving ability, required power and some limitations on the lower end. Hidizs MP145 planars are free from those limitations – easily driven over SE output and capable of large bass reproduction. Even if someone can find a minor flaw, MP145 provides the ability to tailor sound further using the additional filters or might be forgiven for stellar overall musical performance, smooth sound and sweet timbre.

Moreover, Hidizs has disclosed the early bird price for MP145 Kickstarter campaign that would launch soon – only $109. This is an absolute bargain since it is the lowest price on the market for planar IEMs with 14.5mm driver and additional tuning filters as innovation in the supplying set. Therefore, I highly recommend to track down the beginning of KS campaing and grabbing a pair on the early bird terms.

Link to MP145 Kickstarter campaign: LINK

Link to product page and subscription to KS campaign launch notification: LINK

Hidizs has released the news that MP145 IEMs based on 14.5mm large planar drivers would be launched on Kickstarter in the nearest future. Similarly to the latest MS5 and MS3 hybrid products, MP145 would feature exchangeable sound tuning filters and 9 pair of silicone ear tips. All together, this would be a great set for any audiophile. But not only, since the early bird price on KS would be ~100USD !!! which is another win. The closest price rival has similar size of the planar driver but doesn’t feature additional tuning filters, nor such a rich set.

Furthermore, some amount of samples already been distributed among the reviewers (I’ve also received a pair) and the first impression is amazing. MP145 sound great, with large bass presence, rich timbre, excellent resolution and weighted treble. Planars usually sound more pleasing/smooth and delicate to my ears and MP145 is one of the best representative so far.

Full review would be coming soon.

Meanwhile, here is the link to subscribe to KS launch news and to become early bird: LINK

It’s been a while since the last review posted on this blog due to extended logistics. Sending items for the review to Ukraine is quite cumbersome lately, thanks God it arrives undamaged. Hidizs has made quite an effort on assuring that their new MS3 IEMs would finally reach in here, even resending the package twice. Anyway, MS3 are with me now and I can acknowledge the audience of this blog with my own impressions.

Last pair of IEMs reviewed by me were quite peculiar and unusual – KZ ZEX with electrostatic driver in its schematics and Dethonray Tender 1 pure planar IEMs. I’ve had enough time to rest from dynamic/armature hybrid combination and Hidizs MS3 would be the first in series after this pause. Most of the time I am using pure 1 dynamic driver IEMs either from Hidizs/Tanchjim or HiBY since it is the most engaging sound for me, especially when driving IEMs with tube amp. Although, armature/dynamic hybrid IEMs have obvious advantages for some genres and in some aspects that build my interest to find out how technically good the new Hidizs product is.

Hidizs MS3 have been released just a month ago and already have generated a positive wave of impressions by the first owners and reviewers. Promising in the declared features, seems that MS3 really have the potential of becoming a great bargain in less expensive niche comparing to its highly ranked MS5 many-driver flagship predecessor. Good formula applied here by Hidizs – consider the buzz around the flagship product, borrow the most important virtues from it and project it on the less expensive product… Let’s see if the new star was born.

Hidizs MS3 IEMs on sale: Official Hidizs store

Hidizs MS3 IEMs on sale: Amazon

Hidizs MS3 IEMs on sale: AliExpress

Here is the declared specs:

Features:

– 10.2mm Dual Magnetic Circuit Dual Cavity Dynamic Driver
– Knowles SWFK-31736 Composite Balanced Armature Driver
– Aviation Aluminum Alloy Integral Molding Shell
– Three Hidizs Pneumatic Tuning Filters
– Oxygen-free Copper Multi-conductor Cable with 192 Ultra-small Wires
– Highly Approaching the H-2019 Target Curve, and HIDIZS Art Styles
– “Shark Fin” 0.78mm/2PIN Cable Plug
– Hidizs Customized Storage Bag
– Hi-Res Certification

Back to the shipping set and build impression before jumping to the sound experience:

As said before, thanks to quite stiff Hidizs box, this package arrived undamaged. Box carries full product information, product image and manufacturer info. Inner compartment consists of three inserts: foam holding IEMs, foam holding all filters and ear tips and the additional box with audio cable and some papers. Truthfully speaking, Hidizs MS3 are one of the best IEMs in terms of set of accessories. 9 pairs of ear tips, 3 pairs of filters, storage bag, cable – can’t imagine what else might have been included to make anyone totally satisfied… Perhaps, IEMs �� Fortunately, they are also included.

Build quality is great all around. IEMs look and feel perfect, great choice of materials, precise finishing and construction. No gaps between elements, no rattling. Design is quite complex and very neat and beautiful at the same time. Attracting combination of black body with gold edging. Similarly excellent quality of audio cable: unexpectedly thick, consisting of 4 twisted strands, ending with aluminum 3.5SE or 4.4BL plug housing at one side and transparent easy to pull “shark fin design” 0.78 2pin connectors on the other side. This is probably the thickest cable for IEMs I’ve encountered in my reviewing career. Feels durable and makes an impression of being able to last for ages.

Ear tips are all silicone-type but 9 pars divided to 3 sizes and 3 groups of vocal, low and high frequency oriented use. The changes might be subtle depending of its final fit but accompanied by Hidizs special tuning filters that would add more evident changes to the sound. Filters have different types of mesh to cross out / pass some frequencies that would end up in more lows, mіds or treble-tending tonality: silver – more treble, rose – balanced, red – more lows. Here is how Hidizs measured the changes produced by all 3 pairs:

My personal opinion about how effective those filters are: yes, there are audible changes in the sound, especially between red (low) filters + lows-oriented ear tips and silver/rose filters with the respective ear tips. The difference between rose/silver is less obvious due to highly pronounced armature nature in treble/upper mids segment.

The sound:

Consisting of 2 high-quality armature Knowles drivers + single but mighty dynamic driver, MS3 IEMs produce rich and engaging sound. The tonality feels bright which is an outcome of armature driver outstanding capabilities that goes far beyond human perception abilities on treble and some accent placed on upper mids as the consequence. V-shaped tuning is evident, although not distracting since the treble is quite expended, full of nuances and details. On the other side of the range single DD does a good job on mid bass dynamics and presence of lows. The extension of bass is limited but the amount on lows, speed and tightness of mid bass are perfectly enough. Sometimes lows might bleed in and desynchronize with treble and upper mids since it is slower on changes but mostly on such genres as energetic metal/punk rock and only if the quality of the recording/track file is low.

Apart from that, MS3 sound impressive, especially on layering and instrument separation. Every sound is laid out on its shelve, each instrument sounds exposed. Resolution grows with the frequency, treble is the most resolved, upper mids and vocals have great clarity and texturing, whereas the lows are well-exposed but slightly lagging behind in detalization. In overall, MS3 sound great technically. Especially for the slower genres, songs and with high-quality recordings. Musically, it is on the brighter side with excellent overall detalization, layering and mid bass performance but limited on the lowest bass register.

Fit:

MS3 are designed so that it would fit most without any problems. Such shape, pretty long nozzles, over-the-ear hooks and variety of ear tips would allow almost anyone to use it comfortably, even during the active workouts.

Conclusion:

Hidizs MS3 hybrid IEMs posses all the necessary qualities to become a bargain for many audio enthusiasts and even for some demanding audiophiles. Technically MS3 are sounding great – impressive overall resolution and treble extension, great layering and articulation, excellent and tight mid bass. Build quality, feel and especially the possibility of the additional tuning are all exceptional. Musically, MS3 would be great for those who love V-shaped tuning and brighter sound, bass heads would rather stick to some more bass-oriented options. Nevertheless, Hidizs MS3, considering its price, bundle and sound quality, set the bar pretty high for its rivals on the market. Definitely a great option to save some funds and be totally satisfied at the same time. Well done, Hidizs! Anxious to see would be the next product under this brand…

Hidizs MS3 IEMs on sale: Official Hidizs store

Hidizs MS3 IEMs on sale: Amazon

Hidizs MS3 IEMs on sale: AliExpress

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
   ☑️ Fast Global Shipping
   ☑️ We Cover around 20% VAT for Europe Countries. You just pay a few %

*This review is based on the review of the first version on Hidizs AP80 Pro with the additional findings, highlights and details of the PRO-X successor.

For the last few years I�ve been observing how Hidizs has developed from a small domestic single-product company to the international and respected portable HiFi gear brand. My experience covers each single piece of their audio technology: AP100, AP200, AP60, AP60Pro, AP80 DAPs, all IEMs, cable DAC converters, stand alone DAC, etc. Can�t state that all of those had flawless performance but none has fallen short of expectations in terms of audio quality. Still love my old AP100 and still use AP80 as the most convenient one. Furthermore, Hidizs was the first to utilize HiBy OS with its excellent HiBy link option which has become a golden standard for various current DAPs from other brands.

Today I would like to review Hidizs latest incarnation of very popular AP80 DAP series — AP80 PRO-X. There were couple of revisions of AP80 in the past, mostly dedicated to physical user experience, but AP80 PRO-X inherits the best features of its predecessor (AP80 PRO) and makes a huge leap of completely different nature — Pro version brings balanced circuit with the additional 2.5mm audio output and more power to drive higher loads…

Hidizs AP80 PRO-X technical data (differences / advantages over the previous AP80 PRO are in bold):

• CPU: Ingenic X1000
• DAC: Dual ES9219C
• Decoding: DSD64/128/256, PCM 384kHz/32Bit
• MQA: 8X
• Output: Single-ended 3.5mm / Balanced 2.5mm
  • Single-ended Output: 70mW + 70mW @ 32Ω
    • Frequency Response: 20-90kHz
    • Total Harmonic Distortion+Noise: 0.0015% (1kHz)
    • Dynamic Range: 115dB
    • Signal-to-Noise Ratio: 119dB
    • Channel Separation: 110dB (1kHz, A-weight, Rated Output)
  • Balanced Headphone Output: 190mW + 190mW @ 32Ω
    • Frequency Response: 20-90kHz
    • Total Harmonic Distortion + Noise: 0.0015% (1kHz)
    • Dynamic Range: 116dB
    • Signal-to-Noise Ratio: 120dB
    • Channel Separation: 117dB (1kHz, A-weight, Rated Output)
• Recommended Headphone Impedance Range 8-200Ω (Recommended value)
• FM: NO
• Pedometer Sensor: KX126
• FPGA DSD: HBC3000
• Operating System: HiBy OS 3.0
• Bluetooth: Bidirectional Bluetooth 4.2, support aptX, LDAC, UAT
• USB Port: Type-C, supports bidirectional USB DAC
• Remote Operation: HiBy Link
• Display: Samsung 2.45″ (480×360) IPS HD Touchscreen
• Housing: Aluminium alloy CNC
• Rear Cover Material: stereoscopic glass
• Volume Knob: Japanese ALPS
• Buttons 3 physical: play/pause, previous track, next track
• Maximum Storage Expansion: 512GB with MicroSD
• Battery: 800mAh 3.7V Li-Polymer Battery
• Work time: PO interface: 8-11 hours runtime, LO interface: 6-8 hours runtime (depends on actual usage)
• Standby: 40 days (depends on actual usage)
• Charging Time: ~ 1 hour (5V, 2A)
• Net Weight: 72g

Going through new specs it is clear that the main change between AP80 PRO and PRO-X are next gen dual DACs (much better channel separation figures, less battery consumption in running and standby modes), better MQA support (8X unfold instead of 4X). Power output has not changed – 190mW per channel on BAL output.

It also happens so that I currently have both versions of this player and would be able to compare their musical and functional performance with similar IEMs.

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

Packaging and design:

Many visual changes in that part. The box stayed similarly cute and small but it is now more appealing from a glance since containing glossy product graphics, more trademarks and initial information imprints. The insides are similarly well protected and neatly packed.

First goes soft podium that holds AP80 PRO-X, the rest of accessories in their boxes rest underneath. Here you would find:

• AP80 PRO-X DAP with front and back screen guards pre-applied
• USB type-C -> USB A cable
• USB type-C -> microUSB cable
• 2 additional front and back screen guarding film
• couple of leaflets
• short user manual

In contrary to its predecessor, there is no silicon case this time. I am not too upset since I wasn’t very happy with the case quality but I wounder why has Hidizs removed it from this bundle… Perhaps the new design has its own consequences…

More appealing and significant changes found in AP80 PRO-X housing design compared to its previous version: it got even more complicated and definitely consumes even more CNC machine time. Right side edge acquired additional curves and edges that visually lead us to the main element – ALPS volume encoder. It now sits pretty tight, with no apparent rattle or free play. I would say that AP80 PRO-X design is now over complicated for such portable device and starts to remind about A&K shapes.

Left edge displays carries “designed for Hidizs” text which probably means that Hidizs has turned to a new, more advanced design company, which has managed to keep familiar look, bringing some fresh details at the same time. The rest of its virtues remained the same — beautifully looking back covered with stereoscopic glass, intuitive controls, shiny flanges, comfortable physical buttons with tangible clicks.

Screen size and performance didn�t change at all. It is the same 2.45″ IPS  touchscreen with more than enough resolution and sensitivity for this type of a product. It behaves perfectly, has wide viewing angles and enough brightness to interact with it outside, even in the bright light environment.

Performance and UI:

AP80 PRO-X is based on HiBy OS 3.0 and Ingenic X1000 CPU. This combination stays unchanged since the initial release of AP80 DAP and still demonstrates smooth behavior of the user interface. First scan is very fast even with 128GB cards full of different format tracks, all operations are quite snappy.

Seen couple of interface freezes when scrolling through large list of songs but 99% of other interactions are naturally responsive. Haven�t spotted any FW glitches with the latest 1.0 FW version, neither found any severe bugs or translation errors among function list. If you are using any smarpthones based on iOS or Android — you�d feel like being home. Each feature or program is represented by a separate icon.

All general device and audio settings are gathered in Settings Menu, whereas all deep and more precise audio preferences like EQ and filters are located only in HiBy Music application. By the way, HiBy Music looks very similar to its versions for other platforms. No surprises here.  It also features such function as HiBy Link that allows you to control this DAP from a smartphone.

Menu structure:

• Main screen apps:
  • Player
  • Step counter
  • Bluetooth
  • Book
  • System settings
  • About
• System settings:
  • Language
  • Database update (Auto|Manual)
  • Brightness (1-100% slider)
  • Backlight time (stay on or 10 — 120 sec)
  • Color theme (ON|OFF, pattern selection, slider selection)
  • Font size (small|middle|big)
  • USB mode (Storage, Audio, Dock)
  • Button operation when screen is OFF (ON/OFF)
  • Time settings (date, format, time)
  • Idle timer (OFF, 1-10min)
  • Sleep timer (OFF, 5-120min)
  • Battery percentage display (ON|OFF)
  • Standby (ON|OFF)
  • InLine remote (ON|OFF)
  • Recording steps (ON|OFF)
  • Lock volume knob (ON|OFF)
  • Screensaver (OFF|Album cover|Dynamic cover)
  • Restore defaults
  • FW update
• Bluetooth
  • ON|OFF
  • Device Name
  • HiBy Link (ON|OFF)
    • High Quality (SBC, aptX, UAT 600k, 900k, 1,2M, Prefer LDAC, LDAC standard, LDAC quality priority)
  • Bluetooth volume adjust
  • Search devices
  • Paired devices
  • Available devices
• HibyMusic settings:
  • Update database
  • MSEB
  • EQ
  • Play settings:
    • Play mode (through list, loop single, shuffle, loop list)
    • DSD output mode (PCM, DoP, Native)
    • DSD gain compensation (0-6)
    • Resume play (none, track, position)
    • Gapless play (ON|OFF)
    • Soundfield (ON|OFF, -1 — 3)
    • Max volume
    • Power On volume (Memory, 0-100)
    • Crossfade (ON|OFF)
    • Gain (LOW|HIGH)
    • ReplayGain (none, by track, by album)
    • Balance
    • Antialiasing filter (LPFR, LPSR, MPFR, MPSR, AFR, ASR, CMPFR, BW)
    • Play through folders (ON|OFF)
    • Play through albums (ON|OFF)
• Drop down PLAY NOW menu:
  • List now playing
  • Add to playlist
  • EQ
  • View album
  • Properties
  • Delete
• PLAY NOW screen options:
  • PLAY|PAUSE
  • Seek slider
  • NEXT|PREVIOUS TRACK
  • PLAY MODE (shuffle, loop, etc)
  • Menu
  • Add to favorite
  • Show Lyrics
• Swipe UP menu:
  • Bluetooth (ON/OFF)
  • GAIN (LOW/HIGH)
  • USB (DRIVE/DAC)
  • LineOUT Mode
  • Swipe to adjust backlight
  • Swipe to adjust volume
  • Play widget (previous / next track, play/pause, artist and song title)

Should say that the pedometer function was not reliable in AP80 PRO-X, don�t see much changes with the AP80 PRO. My Amazfit GTR2 watches show more steps for the similar period. Therefore, I wouldn�t use this function too much. The rest are working as it should.

In order to update FW: we have to download FW from Hidizs website, unpack it and place update.upt file to the root of SD card. Than run FW update from System menu. It would take about a minute to get it done.

One of the most convenient function of HiBy OS — HiBy Link — that allows  full remote control over HiBy Music player from a smartphone works great. Album covers, song list, play mode, volume — all major functions can be controlled from a smartphone. Love this function that makes AP80 home audio integration and remote control in such user case very convenient.

USB DAC:

I always check this function and spending some time watching live or recorded concerts on Youtube or other platforms. Short audio lag and good driver is what I would chase in this test.

USB DAC mode works perfectly either with the dedicated TUSB (ASIO) driver available at Hidizs website or with the native Windows 10 driver (USB DAC). But note that ASIO version might produce more audio lag which would not be very comfortable for watching videos. USB native DAC driver is completely free of this lag. There is no problems in video to audio stream synchronization while watching videos and sending sound through AP80 PRO-X to phones. Neither there are any problems of using it with Foobar2000 player over Wasapi (event or push).

Using AP80 PRO-X as external DAC for Xiaomi Redmi Note 8Pro smartphone with the provided microUSB type-C -> microUSB cable works fine. HiBy Music app recognized this device and allowed us to send bit-by-bit perfect stream.

I have also checked such rarely used function as «transport»: sending digital audio stream though DAP USB to another DAC USB that drives home audio system. Even this scenario worked as expected.

Same scenarios of sending / receiving stream may also be used over bluetooth. So called bidirectional bluetooth DAC. Bluetooth supports aptX, LDAC and UAT codecs (along with lower audio quality standard codecs). I�ve been able to check aptX IEMs and UAT 1.2M device (HiBy W5 bluetooth receiver) — both worked fine while sending data from AP80 PRO-X. The distance was about 8-12 meters away before audio started to show some severe interruptions. The other way around was checked by sending audio stream from Redmi Note 8Pro to AP80 PRO-X over Bluetooth — no problems there either.

Audio quality:

First, I would like to share AP80 general impressions and than I would compare it to AP80P PRO and AP80 PRO-X by pointing out the changes. Such approach is logical because 3.5 audio output has not changed at all (or there are only subtle changes). Therefore, the main difference and new experience would come from balanced 2.5mm output. To keep this comparison precise, I�ve used AP80 + Hidizs Seeds 3.5mm V|S AP80 PRO and PRO-X + Hidizs Seeds 2.5 balanced IEMs. So, similar IEMs with different types of connection, same settings, same audio material.

Initial AP80 impressions: 

What I like the most is that AP80 sounds neutral with slight tendency towards bright/cold tonality. Lows, mids and highs are in good balance making this DAP universal to feed it with any kind of music genre. I would call it a precise source for connecting any further audio equipment like headphones, large power amps, active speakers, etc.

Good clarity and crispness on higher frequencies with the further ability to switch filter effects; precise texturing and presence of lows; powerfull, fast and punchy midbass; natural sounding at midrange with pleasing vocals and its weighted presence in the entire mix. ATH-M50 40Ohms load is easily driven by AP80 creating the feel of mature and balanced sound picture. Price niche (in comparison to more expensive DAPs) is only evident on higher frequencies (simplified, slightly rough, not that gentle) and overall texturing (not that over detailed).

The signature is a bit on the brighter side, no moody or tube-like performance, no cattle effect. Bass is completely enough to hear its nuances with ATH-M50, at least. Neither I�ve found the disturbing presence of sibilance in highest octave. Besides, I didn�t even try to play with HibyMusic MSEB feature that gives additional control over such aspects as:

• sound temperature
• bass extension
• bass texture
• note thickness
• vocals
• female overtones
• sibilance LF
• sibilance HF
• impulse response
• air

all of that was kept at default settings during out tests and the resulting sound didn�t require any changes. But the availability of such features, along with gain and filters, gives you a huge field for further experiments of tuning this source for the final audio equipment in chain.

Channel separation is better than entry-level models demonstrate but not so distant as in case with flagship DAPs or AMPs with coupled DAC chips. The resulting sound stage width, depth and instument location is equal or even a bit more than we would expected from such portable device. Monaural recordings show good distance and instrument placement on stage with clear horizontal and vertical position.

I also tested AP80 with Hidizs Seeds IEMs and found that they make a great pair. ATH-M50, sometimes, might emphasize low frequencies and are very straight forward. Excellent for detail analysis and tests but too strict for getting some rest… Seeds IEMs are softer, warmer and smooth. They create the additional fluency while maintaining the same amount of details.

If to think about the best pairing: I would say that using AP80 PRO/PRO-X with tube amp like xDuoo MT601/602 makes a great effect of smoothing out timbre and tonality, making music more calm and delicate.

AP80 SE V|S AP80 PRO Balanced output: 

The main advantage of using AP80 PRO/ PRO-X balanced output instead of AP80 3.5 SE is the amount of power it produces which inevitably leads to more juicy presentation, more dynamics (especially in midbass section), more clarity and transparency in overall.

Of course, this difference only becomes apparent with high impedance headphones or IEMs which require more power to be driven to an appropriate level. If pairing both DAPs with the same low impedance | high sensitivity IEMs the differences in sound get less apparent… Perhaps, the main difference is better instrument separation and larger imaginary stage. In other words — I like balanced output sound more due to extended assertiveness in combination with less cramped feel under the same circumstances. Difference between PRO and PRO-X alone is not that evident, at least I cannot spot such.

Freedom to choose more demanding output head gear and having enough power in reserve under the hood — this what makes AP80Pro superior to its predecessor even if the changes in audio signature and characteristics are on the subtle side.

The difference between PRO and PRO-X alone is not that evident. Perhaps the stage became wider (at least it seems so to me). But in overall, sonically, both versions sound very similar and I wouldn’t be able to distinguish between them in a blind test.

Conclusion:   

Since the first day of arrival the initial version of AP80 became the main portable source of audio for me and was serving its role perfectly up till now. There were some bugs at the beginning which were eliminated by Hidizs with the new FW releases. The only arguable spec was its output power resulting into a range of final gear limited to a lower impedance.

AP80 PRO-X, being the latest generation, takes a huge leap and represents the most of the ultra-portable HiRES DAP nowadays. It inherited all the virtues of all previous generations, also comes with more polished and stable FW, incorporates huge amount of modern features and visually appeals too. It is balanced, powerful enough to drive all types of IEMs, earbuds and even some large overheads. Can’t even imagine which other new virtues would Hidizs introduce in the next generation in case if AP80 PRO-X is planned for future upgrades. It is already hell lot of powerhouse in a such tiny package. Perhaps – only the modern 4.4mm BL output is desired, although it is hardly possible due to tight space inside (you can check my AP80 teardown article LINK)

And the last, but not the least – should anyone upgrade from AP80 PRO? Only in case if better MQA handling is vital. Otherwise – probably not. But shifting from regular AP80 or something like Shanling M0 is a must. AP80 PRO-X is just so much better in all aspects.

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

Official AP80 PRO-X page and store: LINK

Thank you for reading.

Once upon a time, in a very far galaxy I’ve decided to try out the new for the time brand in IEMs – Knowledge Zenith. It happened around 3-4 years ago and the unit was KZ ED16. I was never willing to try anything from this brand since than. Why? KZ ED16 turned out too piercing for me on treble, with highly accented V-shaped signature, holding quite bad against its rivals those days.

Although, time goes by, KZ has grown significantly, right to the point that I can easily purchase most of its products in local audio store of my country (Ukraine). Furthermore, lots of talks about this brand, lots of users and fans, lots of reviews and posts. Heard many good things lately which has inspired me to accept the last call from KZ reps to review their recent product. I also cannot forget the fact that KZ was founded by an engineer that worked for Audio Technica and whose idea was to develop affordable high-quality IEMs for masses. Such initiatives are the main driving force for implementing various technologies that once were unattainable in personal applications and making those much cheaper.

All of that is the reason to give KZ another chance with their new IEMs – ZEX. Another reason for me personally – it would be the first hybrid model in my practice that uses dynamic driver for mids and lows together with electrostatic unit for treble. Tried everything – armature, dynamic, piezo, planar – but never had an opportunity to play with electrostatic drivers yet. Let’s see how it goes…

KZ ZEX specs:

• Model: ZEX
• Drivers: 10mm diaphragm, dual magnetic dynamic unit + 6.8mm low voltage electrostatic unit
• FR Range: 20Hz – 40KHz
• Impedance: 25Ohms
• Sensitivity: 103dB
• Passive noise reduction: 26dB
• Cable: detachable, 2-pin, 0.75mm
• Cable options: mic, no mic
• Plug: 3.5mm
• Materials: zinc alloy + resin
• Colors: rose gold, black, graphite

Note: electrostatic drivers are still quite rare in IEMs for its complexity, power draw and cost. In terms of sound, such drivers are more accurate, producing more details, have very fast transient speed, almost no distortions and inertia. In fact, KZ might be declared a pioneer in the field of mass hybrid IEMs with such type of driver involved.

KZ ZEX available at KZ official store on Amazon USA:LINK

KZ ZEX available at KZ official store on Amazon GERMANY:LINK

KZ ZEX available at KZ official store on Aliexpress:LINK

Packaging and design:

I admire how KZ packs its IEMs. Boxes are small, yet neat, rigid and cute at the same time. Whole packaging consists of outer wrap layer with product graphics, information and logos. Inner box has a transparent cover on the facing side for extra protection. IEMs rest in dedicated cutouts of soft foam layer, all accessories located underneath. This bundle includes:

• KZ ZEX IEMs
• audio cable with 3,5mm SE plug
• 4 pairs of silicone tips
• short user manual

KZ ZEX IEMs shells consist of zinc alloy facing plate cover, transparent resin middle insert and base with output nozzle. Those are the first IEMs ever in my hands which shells consist of three parts. My guess for such structure is the modular approach in KZ design to reach some degree of versality and save R&D cost by sharing same shell parts across different models.

Zinc alloy plates look gorgeous, feels like aluminum and contain machined KZ logo and folds as central design elements. This plate have different color options (rose gold, graphite, black) and mine is graphite. Middle resin insert is transparent with blue tint and holds 2-pin cable connector. My opinion, that having such protruding type of connector is more reliable rather than drowned one since it is more convenient to aim and the pins on the cable are protected by outer guiding housings.

Truthfully speaking, middle insert feels a bit odd in this shell compound (tint is a way off), as if it was deposited from another model. Nevertheless, it perfectly fits the shape and exposes the internals which are accurately accomplished. Soldering looks neat, cables moved apart, both drivers sit straight at their places. The only untidiness spotted are the signs of glue that keep shell parts together. It doesn’t worry me much since there is no influence on the sound. Resin base is transparent as well but has brown/gray tint with quite long protruding molded output nozzles which are covered with aluminum mesh. Found single compensational opening between the top zinc cover and middle insert.

KZ ZEX fit is quite comfortable and tight. Guess why the most of KZ IEMs are having similar “custom”-like design… I had around 100 pairs of IEMs by now and can tell you for sure that this shape in a combination with ear hooks is the most universal one. Nothing to worry about here.

Stock cable have two options: mic/no mic and considering the price of ZEX IEMs I would say that mic version is more reasonable – most of the people would use ZEX everyday and it would be more convenient to have the ability to answer calls. Anyway, cable seems to be built pretty well, connectors and plug has the necessary cable protection, claimed to be gold-plated and feels durable. Definitely, not a competitor to expensive thick twisted upgrade cables with lots of mixed silver/copper strands but interchangeable and seems good for this budget, at least.

In overall, the design, even though not having much unique details, didn’t disappoint either. Moreover, I would say that there are some much more expensive IEMs with less accurate crafting and cheaper feel. Therefore, I am giving it 10 out of 10. Shape is perfect, so is the fit, cable looks nice and durable, bundle is regular for any kind of budget and the packaging is one of the most logistics-friendly and optimal for this type of a product. Believe me, when you keep around 100 pairs of IEMs on the shelf – this parameter is vital indeed. I could have stored four times as much if all IEMs packaging were similar.

Sound:

Tested with: Hidizs AP80, HiBy R5, Dethonray Prelude DTR1+ DAPs, xDuoo MT602 tube amp.

Lows and midbass:

Deep bass is large with high amount of textures. Bass amount and presence are quite overwhelming and higly accentuated. Сontouring of midbass is very precise, good layering allows to distinguish different instruments performing in this range. Subbass reaches good depth and have quite good decay speed. Lows remind of full-sized closed-back headphones with slightly congested but powerful presentation. This range has the most weight in overall sound picture. Midbass section is adequately articulated, full-bodied, perfectly detailed and powerful. Drum sections sound pretty natural, creating a good feel of overall dynamics. 

Mids and vocals:

Mids are less upfront than lows. Male vocals sound a bit thin and more distant than female ones which adds more emphasis on clarity and emotional appeal. Resolution is  enough but there is feeling that it is achieved artificially but emphasizing lower-treble. Still voices, strings and blow instruments sound pretty impressive. There is no excessive harshness on upper mids which I didn’t like in KZ ED16, but the sound is still prone to sibilance, especially on female vocals. At the same time, such tuning adds the exceptional clarity to most of the instruments in this range which also brings good layering, instrument separation and stage depth.

Treble:

The most intriguing in ZEX is its treble performance. Twofold impression there. Good are the treble micro dynamics and resolution. Bad is the limited extension and slightly weak emphasis on this range in the entire mix. Treble sounds bright and crisp, but gets shaded by lows and mids in some tracks. The transparency and brightness is highly dependent of the record. The best results were achieved with the brighter source such as AP80 DAP in jazz, rap, blues compositions (low amount of instruments, large spacing). In overall, I can admit that I was expecting more of electrostatic treble driver.

Soundstage:

ZEX show moderate stage width and good stage depth. Instrument separation and layering are good but the lack of transparency on treble and limited extension on both ends makes the stage more congested.

Sound in overall:

KZ ZEX sounds pretty well detailed, with tendency towards lows and dark tonality, emotional and resolving on mids, with impressive mid bass range and crisp but less accented treble.

Compared to…:

Actually, I have nothing to compare ZEX with for now. Most of my IEMs are far more expensive and definitely have more strength in different aspects of the sound. Perhaps, only the Hidizs Seeds that were released quite ago with single dynamic driver and discounted down to the same budget now… Seeds have less comfortable fit, integrated cable and not as resolving and heavy on bass but those are more balanced, have more delicate tuning in overall, thicker mids and more extended and airy treble (even despite it is based on single DD unit).

Conclusion:

Have KZ evolved into more respected products with more mature sound – definitely yes. Do I like it more now than 3 years ago – definitely yes. Now I can state that KZ ZEX IEMs are pretty fine for my liking, although with some rough points that I would still like KZ to polish further. Sibilance effect, emphasized V-shaped tuning, better extensions… At the same time, ZEX are impressive and sound decent on rap, jazz, blues and any other genres with limited amount of instruments. Considering this, I would tell that it is good budget choice for everyday mobile use which is actually the target for this model. Therefore – great bargain. I would still vote for something better for long and calm listening but I would definitely won’t be afraid of having ZEX as main IEMs with fun and juicy sound on the go.

KZ ZEX available at KZ official store on Amazon USA:LINK

KZ ZEX available at KZ official store on Amazon GERMANY:LINK

KZ ZEX available at KZ official store on Aliexpress:LINK

Controversial topic, isn’t it? The endgame should be limited to one… What we mean is not another product of the same category, but the perfect match for the first endgame that we insisted on some time ago – Dethonray Tender 1 planar IEMs. Here is the link to our Tender 1 review if you have missed that. Such IEMs are very demanding in terms of source quality and very power-hungry. We have tried it in pair with various DAPs and DACs, but the best synergy is achieved only with DTR1+ which we would describe a bit later in this review.

Furthermore, since DTR1+ is a highly anticipated reincarnation of DTR1 – first DAP by Anson Tse (Dethonray founder) released back in 2019, that turned out to be fresh approach and revelation sound wise for many – we would also focus on the differences in the performance of the new version of this honored product.

One more input from us (out own understanding): neither Dethonray Prelude DTR1, nor DTR1+ is a mass product with thoroughly calculated economy and profit or decisively added/cut functionality based on marketing intents. It is rather distinctive, much more closer to western high-end niche approach, where the emotional appeal combined with technical SQ put at the forefront while the secondary features like functionality are left out for less narrowly focused equipment. For us, such approach is perfectly acceptable since we consider DTR1+ as the ultimate source that is only about the sound quality for our offline thoroughly selected audio collection in desktop or mobile setup. Although, there are couple of minor drawbacks that we would also describe in this article.

DTR1+ specs:

• Type: HiRes audio player
• DAC: AK4490EQ
• Sample rates: up to 32bit/192KHz
• Audio formats: WAV, FLAC, WMA, MP3, APE (Normal, High, Fast), AAC, ALAC, AIFF, DFF/DSF, OGG
• Frequency response range: 20Hz ~ 20kHz
• SNR: 117dB
• THD: 0.008%
• Max. power output: L: 6Vrms + R: 6Vrms (16Ω) | (1280mW@32Ohms)
• OS: Linux + Ocelot GUI
• Memory: MicroSD (exFAT), up to 1TB, handles 160,000 songs
• Audio outputs: 3.5mm Line-out + 3.5mm headphones
• Connectivity: Micro-HDMI (charging port)
• Battery: 2cell, LiON, ±8.5V PSU, life 8 hours
• Dimensions HxWxD: 100x57x18.6mm
• Color: Black
• Weight: 160g

Changes:

• Power output has been increased
• Redesigned the LPF circuit:
  • Using the top chips improves the resolution sharply.
  • Makes vocals a little more laid back for classical music and new recordings.
  • Enhanced the treble extension, the timbre sounds more lively.
• Redesigned gain and volume audio subsystem:
  • update the gain control to support different IEMs, earbuds, headphones.
  • subdivided the volume range to make the sound more accurate and natural.
  • Added separate R|L channel volume control (0.5dB steps)
• Added the index and classification function for artists.
• Added L/R channel volume compensation.
• Introduced new charging unit (Micro-HDMI -> power adaptor -> USB type C)
  • now any USB – USB type C cable can be used with the power unit
• Button redesign

Main features of the HW/SW part:

• Separate power for decoding and amplifying: DTR1+ adapts dual high-density battery customized power system, designed for High-Fidelity while ensuring separation of digital and analog power to eliminate circuit noise from the source, alike an enhanced DAP + Amplifier system but with a minimal path and hard soldered joints with no compromises. The ±8.5V PSU remarkably improves efficiency of clean power supplied to the system, with noticeable qualities in transparency and background noise control without the need to excessively damping the output.
• EMI shielding: with the precision machining on aviation grade, light-weight aluminum alloy, DTR1 is shielded from EMI disturbance for a cleaner background during play. Precise structural designs with high reliability parts also a patented user interface are combined in pursuit of perfection in sound and optimization of both hardware and software within the design.
• Custom LinuxOS and Ocelot GUI: DTR1+ runs on a deeply-customized Linux OS audio sub-system which utilize a OSS sub-system 30% higher in efficiency than the ALSA audio sub-system. The customized and optimized decode engine ”Nature” synergize effectively with the Linux OS, decodes in optimal condition and reduces transmission delay. Patented ultra light weight GUI system ”Ocelot”, Customized GAI (Graphics Abstract Layer), GDI (Graphic Device Interface), IAL (Input Abstract Layer), SCM (System Control Module), Audio files indexing system – promises minimal MMI, high speed navigation and supporting up to indexing 160000 songs.

Dethonray Prelude DTR1+ is available at the official Amazon store: LINK

Packaging and design:

Prelude DTR1+ comes in a regular, pretty large Dethonray black box where DAP rests on the upper layer of soft foam with special cut outs and charger is stored underneath. There is no USB – USB type C cable provided but you would also find short user manual and warranty card. We would suggest Anson to consider adding some kind of a case for such premium product.

The design has not changed much in comparison to its predecessor – clean, neat, old-school and functional. DTR shell is made of aluminum, except for the back cover. And if it was a glass panel in DTR1, now we have simple black plastics with shiny gold titles. Perhaps this is made for good: first, it won’t crack that easy and second – it would stand deformations better if the battery decides to inflate (hope that this would not occur in the nearest future. But eventually, all batteries die and large percentage do inflate). Another advantage over the previous version – now we have 2 screws at the back to get inside the shell and replace the battery, at least.

Top and left edges stayed blank, while the right still holds volume and power buttons together with SD card slot. Volume and power buttons were redesigned completely, all became larger and now it is much more simple for blind operation since the middle (Volume down) button made larger than the rest.

Bottom edge saved all of its elements – 3.5mm LineOUT, 3.5mm SE headphone OUT, micro-HDMI and Reset. But now both of 3.5mm ports have décor elements in a form of round golden outlines.

Facing side now looks much more organic with larger buttons, decorative lines and markings. Central (ENTER) button is now equipped with Dethonray logo.

Screen has not changed a bit, it seems that the LCD panel itself is exactly the same: 2.32″ TFT screen. The type of the screen and its resolution numbers are not provided among other device specs but my guess would be IPS with something like 640×480 pixels. At least, the viewing angles are ok and thin diagonal lines on the screen don�t produce a so called «ladder effect» common for low resolution screens in combination with larger physical size. Screen edges are ~4.5mm, partially hidden by black screen outlines that visually merges with the shell when the screen is off. Screen doesn�t have a touch sensor layer, thus all user interaction happens with the help of physical buttons. Which is great, we believe. Always preferred physical controls over touch screens for easy blind operations.

Despite that it is far from modern LCDs, DTR1 screen is doing its job quite well. Size is totally enough for convenient interaction with this certain UI, fonts and other graphics are large enough to stay visible. The main and the only concern is the maximum brightness level which is kind of low comparing to any other DAPs and is hardly enough to fight the direct sunlight or bright environment. Usable, but much better to stay in shade.

In overall, the design of the new DTR1 looks more organic and mature. Definitely better and more attractive than the first version of the DAP. Moreover, the operations now are more convenient, thanks to enlarged and reshaped buttons.

Device in use:

First of all – the new charger: separate small unit with status LED, micro-HDMI connector and USB type C port. Now, we can use any USB type C cable to connect to this charger from any 5V power adapter or USB port. Which means that DTR1 can now be charged from PC/laptops, etc but as far as we’ve understood – the function of mass storage has been eliminated. No possibility to get data transfer using the cable. Anyway, not a big deal considering low transfer speed of the previous version. It is always better to take the card out and write using card readers or laptop slots.

Charging unit acts as a step-up voltage regulator and indicates its stated with the status LED. Fast red flashes – no device connected, solid RED – charging. It heats up significantly during the use (~50C) while DTR1+ stays cold when switched on and left charging. Also a good sign for us – better to keep heating elements out of shell and away from the main circuits, battery and screen. Full charge takes around 2 hours and the battery last around 8 hours after that.

SW and GUI:

DTR1+ is running the same version of deeply customized Linux OS with Ocelot GUI as its predecessor. Anson has done a great job of bug fixing and further OS/interface customization during the first months after first version of DTR1 DAP release when active customers started to submit their suggestions and feedback. Since than, this SW combination stays very snappy and stable. No updates available so far, neither any bugs are found. We haven�t noticed any jitters or freezes. Boot time is fast but ends up with showing SD card availability warning and waiting until the track database would be rebuilt. This happens at each boot with no option to avoid it. Fortunately, it takes only ~3 seconds to rescan all files and start playing. Developers claim that this it the fastest process among all recent DAPs no matter the amount of files on SD card and the only payback is indexing upon each power cycle.

UI structure:

• Main player screen:
  • Playing now screen (current track + navigation through tracks)
    • Long press Select to go to Play options
      • Play options:
        • Return to folder
        • Favorites
        • Delete music
        • Play mode (repeat all, repeat one, shuffle, play one)
        • CUE
        • Play through folders
        • High|Low gain (headphones)
        • Line out gain
        • Filter
        • Idle shut down
        • Delete
  • All Songs (alphabetical order of all audio files)
  • Artists (alphabetical order of artists)
  • Favorites (list of tracks added to favorites)
  • Browse (browse through folders)
  • Settings
    • System information
    • Language (ENG|CHN)
    • Play Mode (repeat all, repeat one, play one, shuffle)
    • Backlight (up to 60 sec and always on)
    • Brightness (up to 100%)
    • Power key to main menu (ON|OFF)
    • CUE (ON|OFF)
    • Play through folders (ON|OFF)
    • Switch track when LCD off (ON|OFF)
    • High|Low GAIN (headphones: LOW|MIDDLE|HIGH|EXTRA HIGH)
    • Line out GAIN (LOW|MIDDLE|HIGH|EXTRA HIGH)
    • Filter (Sharp roll-off|slow roll-off|short delay sharp roll-off|short delay slow roll-off)
    • Channel balance
    • Idle shutdown (up to 30 mins and always ON)
    • Timing shutdown (up to 60 mins and always ON)
    • Database upgrade
    • Reset all settings

So, the main newly introduced function is separate 4-step GAIN for headphones and line out. In case of line out it is the only option to limit or increase the volume for active speakers or amp (if not enough or too much). As for headphones, we have found that 4-steps is a kind of overshoot since MIDDLE is already dark on the background for low impedance IEMs and EXTRA HIGH is suitable for anything above 32 Ohms depending of its type. For example, Tender 1 planar IEMs are only 28 Ohms but feel underpowered with any option rather than EXTRA HIGH. On the other hand, pure armature 32 Ohms are a way overpowered… Therefore, let’s say that 3 steps would be enough.

Each track is provided with bit/KHz information on playing now screen, long names are cut if don�t fit the screen width. Still no scrolling. Album art is present.

DTR1 heats up very little even while decoding 24bit/192KHz and playing with 50Ω full-sized overheads at High gain setting. The only time it heats up a bit more is while taking a charge and playing music simultaneously. Case reached about 34C at max which is absolutely no issue.

Sound quality:

Tested with: Dethonray Tender 1 planar, Oxygen single DD, HiBy Beans IEMs, Audio Technica ATH-M50, xDuoo MT-602 amp, etc

Getting back to synergy and endgame question: of course, our first and main intention was to find the best match for Dethonray Tender 1 planar magnetic IEMs. Those are perfect at all aspects, superior to any DD, hybrid or armature rivals by its even representation, rich timbre and perfect instrument separation. The only problem is that Tender 1 are very demanding in terms of power and quality of the source equipment. Moreover, since planar nature looses some resolution – we wanted to pair powerful and very resolving DAP with it. DTR1+ is the best candidate since it is similarly linear, gives out huge amount of details and able drive Tender 1 to full potential. Furthermore, as Anson told us – he has additionally tweaked DTR FW to match Tender 1 and to reach the best possible synergy. So, most of our impressions would be built upon DTR1+ and Tender 1 pair. We would also partially copy the text from DTR1 DAP review, highlighting the changes in the sound of its new version.

Lows:

Bass plays an important role in the sound presentation of DTR1+. It does a perfect job on highlighting bass contours with fast decay and transitions. Bass has a decent weight here, even a bit emphasized but not shadowing other ranges. Lows are perfectly exposed, have extra clarity but not standing out as it was with the predecessor. Extension and amount of textures are slightly limited in a favor of accuracy, speed and integrity of the perception. Such reproduction of lows is less regular but quite interesting and highly appealing. Midbass is perfect, neither too bright or too dark, natural, powerful, tight and engaging. Drums never get too harsh even in the tracks with some extra gain added to this part. In overall, DTR1+ lows sound more organic and integrated to the entire mix if to compare to DTR1.

Mids and vocals:

If you ever wanted a DAP with huge amount of details, clarity and resolution on voices and instruments in mid section — DTR1+ is here to capture your mind. The first try overwhelmed with the feel of extra resolution of keen mids even with the reference dynamic IEMs. Pairing it with BA extends this perception even further. Outstanding resolution and bears the clarity of each single sound which leads to reconsidering the knowledge of the most favorite tracks. And this is not a joke — most of the DAPs on my shelf are more or less similar, tending to the reference side with neutral or warm tonality and moderate amount of details for the sake of melodious presentation. DTR1+ acts completely different — it reveals maximum amount of details in a rampant impulse to convey emotions. It doesn’t mean thinner or colder sound any longer, nor it is prone to hisses – just the new experience with extra clarity and resolution. Absolutely impressed by the approach of DTR1+ towards mids, especially with neutral and mid-sensitive IEMs. Comparing to DTR1 – new version gained more body in mids and became slightly thicker which made the sound even more balanced, easy and linear on perception. Absolutely no screaming sounds, peaks or lisping, absolutely accurate and resolving.

Treble:

This is logical that if mids are impressing with exceptional resolution and clarity — treble would be even more capable of the same as the part of such perception on mids originate from the reproduction of treble. This is true — decent clarity, transparent and airy sound here. Treble is not overemphasized or piercing, it has the same weight with no perceptible accent, sounds extended, accurate and balanced to other ranges. Some lack of gentleness is compensated by huge amount of details and distinct exposition. Changes with DTR1 are subtle since the extension, resolution and control of this range was perfect with DTR1 and stays perfect with DTR1+.

Soundstage:

Another good outcome of excessive clarity and resolution is the extended depth of the perceived soundstage. Instrument separation and overall sound transparency is so good and the location of each instrument is so evident that the stage gets the necessary and pleasing depth of field. Although, width is not that impressive as the lows don�t spread out much to side but rather kept collected. No apparent changes with DTR1.

Sound in overall:

Dethonray Prelude DTR1+ sound can be described as highly detailed, perfectly balanced between the ranges, transparent and linear, with rich timbres and very calm performance. Instrument separation is decent which makes DTR1+ a best contender when it comes to HiRes tracks with lots of instruments and drive. Similarly to its appearance, the sound has matured – became slightly thicker, maintaining similarly high resolution but now delivered in a perfect monitor nature. All rough edges got proper treatment – now this DAP is totally transparent for any end gear.

The best experience is DTR1+ and Tender 1 performing together. This DAP provides enough details to compensate Tender 1 planar nature while Tender 1 is pushing instrument separation, timbre of mids and overall gentleness of the sound to maximum. This particular pair is what we were talking about when we said that we have grown up from rough listening on-the-go and want to focus on calm evening sessions and delicate sound. Interesting additional observation is that the only competition we have found for DTR1+ / Tender 1 pair is the combination of HiBy R5Pro + xDuoo MT-602 tube amp + Tanchjim Oxygen IEMs. Such combination lacks some resolution but the rich and delightful timbre is possible with the tube overtones of MT-602, delicacy of Oxygen IEMs and power of R5Pro. Almost the same budget, though… which is expected, actually.

Conclusion:

Never thought that the original Dethonray Prelude DTR1 would ever get beaten concerning its stellar audio performance. Lots of DAPs from other brands since 2019, more functional and modern, but DTR1 always stayed very distinct benchmark for clarity, resolution and monitor-like sound. But here comes its successor, with better design, new functions and what is the most important – polished, free of any rough edges, more thick and linear performance that also carries all nuances what we loved DTR1 for. Adding here the excellent synergy with recently introduced Tender 1 planar IEMs – and this bundle becomes very unique object of desire among high-end portable sources. The only function that we regret is the absence of USB DAC but the rest such as MQA or Bluetooth audio are from another world and for another segment. Dethonray Prelude DTR1+ is solely and completely occupies the niche of a DAP with highly detailed, powerful, analytical sound, totally transparent for any end gear.

Dethonray Prelude DTR1+ is available at the official Amazon store: LINK