Hidizs ST2 Nebula – the new great option for audio fans with a smartphones missing a dedicated analog audio output and for those, who don’t like cumbersome desk setups with the external DAC/AMPs. All-in-one, universal solution that combines everything – high-quality IEMs, type-C DAC/AMP and even HD mic with phone control button. Time to test whether such bundle does the trick of delighting a demanding user, performing good in both – audio and everyday general use.

Hidizs is giving away ST2 Nebula bundle and other prizes for free. Join this draw here: LINK

You can get the least price and support this product on Kickstarter: LINK

Kickstarter Launch Date: December 19th, 2024, at 10:30 AM (EST)

Pricing Details:

ST2 PRO Nebula (Super Early Bird): $39.00 (Limited to 500 units)
ST2 PRO Nebula (Early Bird): $49.00
USB-C DSP 0.78mm 2-pin/MMCX Earphone Cable (Early Bird): $36.00

Being a fan of single dynamic IEMs, I am glad that Hidizs intends this bundle in particular. Not limited to single type of IEMs – you can use any model of your choice with 2pin / MMCX connector to use with this DAC/AMP on a cable – but the supplied IEMs are the most universal in its tuning, shape, performance and price. Single DD, 10mm DMC lightweight diaphragm, large resonance chamber and H-2019 target curve – what can be more convenient for most of the ears? What I mean by that is that Hidizs made a move to present something that can go easy on every person, no matter which smartphone/laptop/pc/tablet and OS he uses, no matter the music genre he or she likes and no matter what size and shape of the ears he/she has. Nebula should fit and satisfy any. Type-C brings the possibility to connect to most of the modern devices, custom shape is the most versatile, H-2019 curve and dynamic diaphragm combination makes music smooth and crosses out high peaks. Plus the ability to use mic and watch videos with zero-latency… It is only left to try out and find whether everything declared goes flawlessly.

Hidizs ST2 Nebula specs:

IEMs:

• 10mm DD, dual magnetic circuit diaphragm
• resin + aluminum alloy etching shells
• freq.range 20Hz-40kHz
• 0,78 2pin/MMCX ports
• inline control + HD mic
• sensitivity 108dB
• impedance 32Ohms
• weight 7g

DAC/AMP

• ES9281AC PRO
• 32bit/384kHz / Native DSD 64/128
• MQA 8X
• distortion 0,0012%
• snr 118dB
• dynamic range 122dB
• ch.separation 63dB
• output power 70+70mW

ES9281AC PRO used in Hidizs type-C DAC is the flagship SoC with integrated USB. It is not that common among its rivals and let’s say – above the line. Although, what matters more than the chip itself – is the integration and circuitry around the chip that can either disclose SoC potential or place it below the worst products. Hidizs team has large experience of building compact audio products that allows them to go the first way – build a tiny DAC/AMP that sounds like a DAP or even some desktop devices. But I’d leave it for the sound test section.

Box contents, design and build quality:

Nebula fits to small black box, traditionally with silver shiny names, logos and product pics. Two layers inside, one to secure IEMs in place and additional pouch with handy opening mechanism found underneath. Cable is located inside this pouch. Personally, I don’t like that the pouch has some soft cloth inside as the velcro tape around the cable is quite sticky… Anyway, it does it job of keeping IEMs scratch-free in real life. Additionally, there are couple of small bags with a set of silicone ear tips and USB A -> USB C adapter.

Having such adapter means that Nebula has everything you need to use it with PC/laptops that don’t feature type-C ports.

Always been a fan of transparent materials used in the design of electronic equipment. ST2 features not only transparent IEM shell to see its neat cable management and channels but also the body of DAC/AMP is a combination of aluminum and glass. This opens its internal circuitry for observation and brings the additional feature: LED sample rate indicator. This has been a distinctive feature across all Hidizs products for a long time now. Not saying that it is very informative, but you can easily differentiate SD/HD track sample rate, at least.

IEM shells are available in dark / light options, all equipped with 0,78mm/2pin ports for cable and have long protruding output nozzles, ending up with protective mesh.

As far as I understand, Hidizs would also make ST2 Nebula cable with integrated DAC/AMP available separately, in two versions: 2pin and MMCX types of connectors. This would allow make any IEMs compatible with most of type-C devices.

Cable that came in my bundle is 0,78/2pin type, wrapped in textile yarn, has flexible ear guides, equipped with HD mic and inline remote button and ends with the aluminum DAC/AMP shell. Feels sturdy enough to live long and serve its purpose for many IEMs that I would like to try out in such scenario in the future.

In use:

Couple of words here about ST2 Nebula operation: as already mentioned – it is compatible with any USB type-C equipped device that has the ability to recognize external DAC. Windows, Mac OS based desktops or laptops, perhaps Linux based platforms, Android/iOS tablets and smartphones with OTG support… Hidizs says that only IPhone 15 and later are compatible (I am not Apple fan – only IPhones starting from 15 has type-C????). Even if you don’t have type-C, you can try to use USB A -> type-C adapter or some USB hub. Even Hidizs AP80 player running Linux-based HiBy OS has successfully recognized Nebula as an external DAC.

Since this device is passive (doesn’t have a battery) – it relies on USB power. Not a big deal for any device, except the smallest ones like Hidizs AP80 DAP which recognizes and utilizes USB DAC perfectly but the battery drain goes faster. What I’ve noticed is that Nebula gets quite warm, especially with HD quality tracks. About 42 deg.C after 15-20 minutes of indoor use. SD quality doesn’t have such impact. Anyway, 42C is nothing to worry about. Just having a warm little powerhouse in your pocket. Power consumption is about 50-55mA @ 5V.

Sound quality:

Since IEMs are tuned accordingly to H-2019 curve, they produce smooth sound with no accents or unexpected peaks. This is a slight V-shaped tuning with rich but slightly congested lows, dynamic and tight mid bass, natural and mellow mids and balanced treble. Amount of details and resolution are not overwhelming but IEMs still sound clear and have well defined instrument spacing and their layering. Nothing gets lost in the mix, each small detail is present. Stage depth and width are moderate but not too tight. I would say that those IEMs belong to 70-120$ single DD class, no more and no less. Perhaps, the least detailed here is the treble – lack of lightweight airiness and slight tendency to hisses. Although, this is compensated by the overall good balance and its timbre which make those IEMs sound natural and immersive. Was surprised how good it handled most of the music genres, including rap and hiphop, but noticed a bit of harsh high notes in heavy metal.

DAC/AMP SoC on its own is unexpectedly powerful for the bundled pair of IEMs – even 30% volume is quite a lot. I even tried Hidizs MP143 planars to pair with it and IEMs felt decent with this level of power output. Didn’t notice any obvious coloration or accents in comparison to Hidizs AP80 player – quite close. The only difference is that AP80 DAP is pushing slightly more noticeable texturing across the ranges and a little bit more delicate on treble. Such details are only apparent after long A/B testing in quiet surroundings, not on the go as intended by Nebula nature.

HD mic works fine on my Xiaomi smartphone but I wished that it would be a little more sensitive and less prone to incoming noises. It captures voice clear and loud indoors but might suffer from the surrounding environment and rubbing against clothes outside.

Conclusion:

Hidizs ST2 Nebula is good, convenient and universal bundle of IEMs and type-C DAC/AMP designed to be used with most of type-C equipped devices, no matter indoors or on the go. IEMs are both – comfortably tuned and ergonomically fit while DAC is cross-compatible between different OS, devices and IEMs, as well as powerful enough to drive even more demanding planars. Therefore, buying such bundle we get 2 devices at once that can be used independently. But I like the synergy it produces as a bundle and the intention of Hidizs to create the balance between the connectivity, sound quality and convenience of everyday use of this combo. I would leave my planars and DAP for more dedicated listening while ST2 Nebula bundle can join my smartphone when I leave home.

Hidizs is giving away ST2 Nebula bundle and other prizes for free. Join this draw here: LINK

You can get the least price and support this product on Kickstarter: LINK

Kickstarter Launch Date: December 19th, 2024, at 10:30 AM (EST)

Pricing Details:

ST2 PRO Nebula (Super Early Bird): $39.00 (Limited to 500 units)
ST2 PRO Nebula (Early Bird): $49.00
USB-C DSP 0.78mm 2-pin/MMCX Earphone Cable (Early Bird): $36.00

Great news from Hidizs for everyone who already prefers or only willing to try the might of planar-magnetic IEMs: Hidizs launches the new version of their well-respected masterpiece in this niche (which is MP145) – MP143, codename “Salt” (“in honor of famous humpback whale Salt – a whale that has a long-standing relationship with WDC” – quote from Hidizs website). Similar to it predecessor, MP143 IEMs are inspired and created to support WDC (Whales and marine ecosystem preservation) that is being resembled in product design, eco-friendly packaging materials and what is more important – by the donations to the respective programs since 2023. MP143 are the newest, more affordable planar-magnetic IEMs that is planned to be launched on Kickstarter on 8th of August, 2024 with the Super Early Bird Price of $79.

In my opinion, the declared Early Bird price is a bargain, considering the overall quality and success of MP145 predecessor. With this review I would like to compare both versions and provide my opinion as to the differences and similarities between the two.

Here is the link to the upcoming Kickstarter campaign: LINK

MP143 tech specs:

• 14.3mm 7+7 array N52 magnetic circuit Large Planar Driver
• Nano-level diaphragm
• CNC one-piece aluminum alloy cavity
• 20Hz – 40kHz response range
• Sensitivity 103dB
• Impedance 17Ohms
• Ultra low distortion <0,05%
• Hidizs Pneumatic Sound Tuning Filters
• Target H-2019 Curve & Hidizs Style Professional Tuning
• High-purity OFC twisted pair wire
• Customized Pouch for MP143
• 3.5mm or 4.4mm gold-plated cable plug
• 0.78mm 2-Pin Cable, gold plated connector and copper plating shell
• Hi-Res Certification

As obvious from the product name, the new MP143 IEMs utilizes 14.3mm planar driver instead of 14,5mm of its predecessor. Such change in size is not limited to diaphragm, but also applied to the overall dimensions. MP143 are 20% lighter, 5% thinner in width and 18% shorter in height addressing the claims of some end customers about higher fit comfortability. Yes, MP145 were on the larger side (although, I, personally, didn’t have any issues with that) but MP143 been made smaller, still built upon the large driver and suitable driver chamber. I would say that MP143 are still on the larger side but apparently smaller than MP145. And I would rather leave it as it is, not to sacrifice its sound quality.

The rest looks similar to MP145: H-2019 target curve, response range, HiRes certification, possibility to exchange sound filters, types of connectors and variants of SE and BL plugs.

Design:

Hidizs has developed the new, eco-friendly, plastic-free packaging for MP143. Stiff box with lots of product information, WDC logo and accurate inner arrangement of the components. And yes, the storing pouch with the special springy mechanism is also included. Here what you’d find in the box:

• IEMs
• Storing pouch
• User manual
• Warranty card
• 3,5 or 4.4 SE or BL cable
• 3 pairs of silicone ear tips (balanced)
• 3 pairs of silicone ear tips (treble-oriented)
• 3 pairs of Hidizs pneumatic filters (lows, balanced, treble)

If you’d opt for the limited edition, it would include the additional items: 3,5 and 4,4mm SE and BAL cables, global unique number, budget pin (Hidizs x WDC), postcard collection (Hidizs x WDC)

The design of IEM shells has slightly changed from resembling whale fin to “14 delicate lines resembling waves and baleen plates, with a whale-like contour breaching the water surface, creating a unique and identifiable appearance” – quote from Hidizs website. As already said, the overall dimensions became smaller, but the material is similar – aluminum. Sound nozzles are long enough for a comfortable fit, great choice of reliable 2pin 0,78mm cable connectors. The cable is equipped with ear hooks, built durable and declared to be good enough to disclose full IEM potential.

Fit:

Again, as mentioned, I didn’t experience any problems with MP145 IEMs despite those being on the larger and heavier side. Those are definitely not built for exercising (I wonder who want to exercise in planar IEMs that are built to enjoy the ultimate sound quality), thus, no problems in its intended use. MP143 are smaller and lighter, maintaining similar shape and length of nozzles which make the fit even better.

Sound quality:

Design, declared specs and other virtues are nothing if the sound quality can’t keep on par. Fortunately, this is not the case with Hidizs MP143 IEMs. MP145 were excellent in this respect, with decent sound stage, perfect separation and layering, great dynamics and resolution, thick and rich sound…, just hard to compete. Although, MP143 possess most of the virtues in sound as its more expensive sibling:

Lows:

This is where the most of the changes to MP145 are applied. MP143 IEMs have stronger and wider bass range which influences the rest of the sound more. Not bassy or muddy, but lows are obviously more accented, its presence shifts MP143 to clearly warmer / darker side. Great that despite it larger amount, bass is still well outlined and perfectly controlled. It doesn’t overwhelm, neither shadowing mids or treble. Countours are nicely defined which separates this portion from other ranges, making it distinguishable and precise. But the presence itself makes me perceive this bass as larger and stronger compared to MP145. More suitable for those, who likes tight and controlled lows. Consequently, mid bass has more bass influence but maintains similarly great dynamics and that pleasing tight hit that differs planar IEMs from slower-to-react dynamic diaphragms or thin-sounding armature drivers. Excellent.

Mids:

Slightly less presence and accent comparing to MP145 but similar richness, high amount of texturing and even warmer timbre. Another advantage of a warmer sound is that MP143 are less prone to sibilance even with the specific records that might become unbearable with BA drivers and show some sibilances with MP145 IEMs. Vocals sound natural and rich, although a bit more distant than lows or treble. Kind of U-shaped tuning but not a steep one. Can compare it to old tape rock/metal records when the additonal accents on lows and treble were added as classical tuning for such music genres. Other than that – similar to MP145: clear, accurate and thick sound in this range that makes this IEMs a perfect choice for many genres for long listening sessions.

Treble:

Depends. With some rock ballads or such type of music (Dire Straights, Pink Floyd, etc) – treble might feel very slightly distant or underpowered but as soon as I’ve switched to something like Jean Michel Jarre (Exynos 4, Oxygen 4) – it became clear that treble is perfectly enough. Moreover, it is excellent in terms of thickness, resolution, clarity and precision. Again, thanks to fast but large planar diaphragm that wins over BA in the body of each sound and in clarity over dynamic drivers. Moreover, it allows better separation/layering and creates great perception of each single sound it produces. Thus, all instruments are heard, placements are obvious, no muddiness or mixing/bleeding. If to compare to MP145 – MP143 treble is slightly less present but equally well cooked.

All of my impressions were acquired with balanced sound filters and ear tips. For those who would like more treble or lows – there are other sets included in the package that makes MP143 similarly flexible in the additional sound tuning as MP145.

Soundstage:

No changes in this aspect between the two. I would say that despite decent layering and separation, both IEMs build moderate scene width. The best what I’ve heard were either multi-driver IEMs or open-backs or the stage was artificially increased by the means of wide-sounding DAC/AMP. But with the similar Hidizs AP80Pro DAP – both IEMs are slightly congested.

The result:

Do I like MP143? Yes, indeed. Especially concerning the upcoming campaign, early bird prices and further MSRP decrease options. Several years ago planar IEMs were as rare as unicorns with the cost of a jet wing. Now, with the efforts and investments of Hidizs and other respected brands in this niche – we can finally choose between the various existing options. And MP143 are one of the most affordable IEMs, despite having much in common with its more pricy flagship predecessor, both build quality and sound wise. Would I prefer MP143 over 145? Yes, as long as the preference is towards warmer sound with more accent on lows or the price matters. Otherwise, the flagship stays on its pedestal. Finally, would possess both as great examples of once very rare planar-magnetic IEMs, brought to perfection and crafted with knowledge.

Link to the upcoming Kickstarter campaign: LINK

Hidizs MP143 official page: LINK

Hidizs, as a company, already has extended lineup of ultra-portable USB DACs to suit any taste and compatibility. Some were enhanced versions of the previous iterations, while others brought completely new form-factor and functionality. The reason for another generation of S8-series model is shifting again to Cirrus Logic DAC chips that impact the resulting sound more than the form-factor, design or sound tuning. Hope that one day Hidizs would release something like this based on the beloved AKM DACs that sound the most mellow and musical to my personal taste. Although, this review would shed some light on how or whether CRL DACs sound better or worse compared to its S9 Sabre siblings.

S8 Pro “Robin” sales has launched on 20th of May with $69 listing price. First 100 order would receive 5%OFF automatically, resulting in the price of $65.55. Additionally, even the first 100 orders as well as the consequent ones may use our discount coupon code ZMCR5OFF to bring prices down to $61.75 and $65,55 respectively. This all applies whenever the product is ordered in Hidizs official store: LINK

In the box:

S8 PRO (codename “Robin”) shares the box design with S9-series USB DACs – very compact and sturdy. High quality prints all around the wrap, full list of specs and features on the back side. Box itself is made of recyclable plastics, inside you’d find soft foam holding the DAC and small compartment underneath that stores all of the additional accessories.

Apart from the DAC itself, there are the next items included:

• “HiRES” stickers
• Type-C to Type-C cable
• Type-C to USB A adapter
• Type-C to Lightning adapter

Having the latter in the box provides the compatibility of S8 Robin with iOS devices equipped with the corresponding port.

Full specs of S8 Robin are as following:

• 1. Dual 32-bit High-performance DAC Balanced Architecture – CS43131×2
• 2. PCM Supports Up to 32bit/384kHz
• 3. Native DSD 64/128/256
• 4. 4.4mm Balanced & 3.5mm Single-ended Output
• 5. CNC Aluminum Alloy Integrated Molding
• 6. Practical Function Buttons (volume +-/filter switching)
• 7. Sampling Rate Indicator
• 8. 80mW+80mW@32Ω 3.5mm SE / 160mW+160mW@32Ω 4.4mm BAL
• 9. Compatible with All platforms: Windows/Mac OS/iPad OS/Android/iOS/Harmony OS
• 10. Hi-Res Audio Certification

Looking at the design – it also resembles previous generations of S8 and S9 DACs, with some new features and more complicated elements. S8 Robin case is made of aluminum with glass panels covering front and rear of the device. The newly designed are the decorative fins on the right side, and all buttons on the left. Pity is that the central crown is not a rotary element as it seems to be. It is a mere push-button that serves only one purpose – to play|pause. Other two buttons are for changing the volume (long press) / changing effect filters (simultaneously press both).

Since this DAC is fully balanced (2 DAC chips + parallel L+R circuitry) – it is equipped with 4.4mm Pentacon balanced connector along with single-ended 3.5mm one. USB type-C is used to connect S8 Robin to the source (Windows, Android OS, iOS, MacOS devices and HiBy OS DAPs).

S8 Pro Robin is very lightweight (only 17 grams), doesn’t require external power supply and doesn’t heat up notably which makes it perfect companion for phones, tablets or laptops.

In operation:

Undoubtedly, the central design element of this DAC is the semi-transparent logo at the front that also lights up with different colors resembling current sample rate and the chosen filter effect. To understand it, here is the list of color and corresponding meanings:

Effects:

• Red: High Pass Filter
• White: Wide Band and Flatness Mode
• Green: NOS Filter
• Blue: Deem Phase Filter
• Yellow: Fast & Slow Filter
• Pink: Phase Compensated Filter

Sample rates:

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

I’ve paired S8 with Xiaomi Redmi Note 8PRO, Lenovo Thinkpad E14 laptop, DooGee tablet – all recognized S8 Pro as USB DAC straight away. But I would recommend to use some specific audio player apps on Android (like HiBy Music) and ASIO drivers for S8 Pro on Windows 10/11 (available at Hidizs official website download page) in order to bypass system mixers and get the best sound quality.

As to the power draw from a smartphone – S8 Pro is pretty effective. I’ve noticed around 3-4% increase during 2-3 hours of listening to music with the screen off.

Sound:

Lows:

There is a slight emphasis on the bass which gives a bit of warmth to the overall sound which is quite good for my taste. Just getting border of the crispy sound of the Sabre siblings. Bass extension is pretty good. Lows are apparently outlined, exhibit moderate detalization. Mid bass is tight and punchy with most of the sensitive IEMs and gets slightly dull with large overheads. This region is the most vulnerable for power-hungry headphones of any types. Anything below 72Ohms should be good to go but I would not recommend the most of the ultra-potable USB DACs for anything above that.

Mids:

I like how the warmth that bleeds in from the lows add the wight and timbre to the mids. Mids manage to stay close to neutral but the warmth make it feel more volumetric and standing forward. This also helps to keep the control of the upper mids which doesn’t exhibit sibilants or hissing. Higher resolution is evident here, separation and layering of the instruments are quite good. S8 Pro is definitely demonstrates the best performance in this range – rich, resolved, natural sound and appealing timbre.

Treble:

Again, treble is sensitive to type of the IEMs or headphones used. The best performance when there is no notable shading is with the armature-based sensitive IEMs while closed-back overheads might tend to dark sound when you’d obviously lack treble amount. I wouldn’t say that treble is not crispy or detailed enough. Neither it is not under-emphasized – presence is pretty balanced with the most neutral IEMs. But the rest – resolution, amount, crispness and extension is headphones-dependent, more than with Sabre siblings. Part of this comes from the overall slightly warm sound character. Again, with neutral of bright IEMs – treble feels excellent, with no fatigue and pleasant for long listening sessions even at high volume levels.

Conclusion:

There is almost a full lineup of USB DACs from Hidizs in my possession, as well as 5 other ultra-potable DACs from other brands (ColorFly, Audirect, etc). And among those my favorite ones are from Hidizs due to the combination of price/power output/sound quality. Recent S9 generations were based on ESS Sabre DAC chips with its prominent treble clarity and performance but I’ve always tended towards warmer sound and mellow timbre. That is why DAPs based on AKK ships are the main sound sources for me throughout the years. At last, Hidizs has made a DAC with the sound character much closer to such preferences. It sounds rich, warmer, puts a slight emphasis on mids, brings it forward, resolves lows pretty well and doesn’t make you feel tired after long listening sessions due to the reasonable amount of treble.

Hidizs S8 Pro “Robin” is available at official Hidizs store page: LINK

Use ZMCR5OFF coupon code to get 5% off the listed price.

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

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.