About five months ago, I’ve published my review of the original NF ACOUS NM25 monitoring IEMs. Based on a single DD unit and aimed towards enthusiast and professional musicians, NM25 exhibited stellar overall audio performance, thanks to thorough factory tuning. Its build quality and fit comfort didn’t disappoint either. As much as a love single DD IEMs, NM25 have managed to tick all boxes and deliver on all of the nuances that make such type of IEMs universally perfect.

Almost half a year later, NF ACOUS is releasing very limited version of NM25 IEMs – Ossuary Silver Edition. This is accomplished in collaboartion with the independent silver crafting studio (Ossuary), where the technical perfomance left untouched but the exterior is redesigned – faceplates are thoroughy handcrafted from a solid 925 silver blocks, beautifuly stylized, intorducing specific theme and reflecting the character. Silver edition design style definitely resembles the precision, clarity and distinctivity in sound, perfect for rock and metal genres that NM25 are capable of. And the new look is georgeous! Can’t recall any other so bold-looking piece of art in IEMs for the past decade. I’ve already experienced the moment of astonishment of my teenage daughter when she saw it for the first time – having some attraction to black color, heavy bands and the corresponding subculture, she couldn’t take her eyes of these IEMs and immidiately wanted it in her possesion. So, not only the audio quality, but the style involved, makes NM25 Ossuary Silver Edition to be perceived as a piece of art for own collection.

While technical specs and the impression about the sound can be found in my review of the original NM25 IEMs, I wanted to share the new looks that I’ve managed to capture during the recent photo session:

Original photos from NF ACOUS:

Hope you’ve enjoyed the new style.

NF ACOUS NM25 Ossuary Edition would be launched on 20th of April, 2026. It would be available as NM25 “Ossuary Silver Edition” separate product page at NF ACOUS store: https://nfacous.com/

First batch would be limited to 50pcs only. Catch up if you want to have this piece or art in your collection!

The best inspiration for me in writing this article about Hidizs’ new MP145 Pro IEMs is that finally, I can clearly depict facts to support the statement that Hidizs, as a company, listens to its auditory and approaches the new products with the feedback in mind. MP145 Pro is the derivative of the original (og) MP145 magnetic planar IEMs that were and still stay quite rare on the market. The pros of this technology is obvious – agile diaphragm with faster response time, more precision due to even flex driven from both sides and naturally more air pushed with the larger diaphragm area. Such IEMs produce highly resolving, thick sound with outstanding instrument / voice separation.

Original MP145, released back in 2023, are excellent planar IEMs for the price, with just a few complaints mentioned by the owners: slightly prone to hiss/sibilants (skewed towards upper mids) and not that ergonomically perfect for everyone. Both issues were addressed in MP145 Pro. But even more…

This is the comparison of MP145 V/S MP145 PRO specs:

FR curve closer:

Main structural changes:

• 1T fully symmetrical magnetic circuit (+40% magnetic flux for enhanced clarity, stable magnetic field, and greater driver efficiency)
• 14.5mm ultra-precision nano-grade planar diaphragm (+30% more copper & wire density for better detail, faster response, and a wider dynamic sound)

Changes in sound:

Sound Signature: transparent, more controlled bass, a reference-grade midrange with reduced coloration, and exceptional treble extension for a more expansive soundstage.

The main changes in sound are the results of the final tuning with more even response distribution in upper mids/treble, slight elevation in bass region and some heavy changes in treble. Whether it is for good or worse – we shall see in the sound comparison section.

What’s in the box:

Hidizs did not disappoint with the bundle contents, as always. Here, in a small but sturdy box you’d find:

• IEMs
• 24 pairs !!!! Carl!!! of silicone ear tips (3 x vocal, 3 x bass, 3 x balanced, 3 x anemone)
• 3 pairs of sound filters (rose gold – balanced, silver – high freq, red – low freq, 2 pairs in a separate storage case and 1 pair applied to IEMs)
• large storage case for IEMs
• audio cable
• SE 3.5mm plug
• balanced Pentaconn 4.4mm plug
• some papers

I’ve also got WDC badge along with the bundle which reminds that Hidizs actively collaborates with WDC organization for whale and dolphins preservation program. Learn more about it here:

The first and the most crucial update in MP145 Pro, for me, personally, is the change in audio cable and plugs provided. I’ve been communicating with Hidizs about such option since the release of the og version which I thought lacked the connection versatility out of the box. Such product is an investment that builds joy for their fans for a long period of time and people want to have everything packed together to get the most satisfaction from their purchase. Why would I want to search for third-party balanced or SE cable options if I already made a vote for Hidizs and believe that their equipment worth it… I wanted all components to be provided and tested by Hidizs, and included.

Anyway, I am impressed that Hidizs have listened and now we have the possibility to connect to either SE or balanced source straight out of the box and in the most convenient way. Just detach one plug and connect the other one. Great!

The other notable change is the new shape and overall ergonomics deriving from that. Shape is still very complex, based on whale tale inspiring design with lots of CNC time involved.

Here is some great video of how MP145 Pro are made:

But despite that the weight added a couple of grams, IEMs appear smaller or more rounded. The main change that adds to the ergonomics is the prolongued and thinner sound nozzles that allow for more natural and deeper fit. I would say that MP145 Pro would definitely fit more people.

The only question that I have left is the choice of color for the storage case. I don’t understand why black box with either gold, blue or black IEMs contains turquoise case. The only clue is that it should address the color of the ocean. If so – that’s fine,, there is a logic, at least.

The sound:

I’ve tested MP145 Pro and the og MP145 with Hidizs AP80 PRO MAX DAP (balanced output + balanced ear tips + balanced filters)

First of all, the best part that stay the same for MP145 Pro and it predecessor is the ability to drive those IEMs with low/mid power portable sources. Not a smartphone, of course, but the DAPs with >80mW power like AP80 Pro and above do a great job when set to HIGH gain. Other planar IEMs that I posses are more power-hungry and require >200mW and more to be driven this well. Hidizs gone to low impedance / high sensitivity combination for planars which is an achievement by itself.

Secondly, all the best virtues of the sound of this technology are here: excellent dynamics, layering and intstrument separation, high resolving potential and lots of texturing, especially in mids. Thick mids and overall warm timbre is usually defining and revealing this tech, which is also true for MP145 Pro.

I do like how Hidizs has retuned treble part. It is not that prone to sibilants anymore as it was in og version with low quality recordings and some bright tracks at higher volume. Now, it sounds less aggressive, still maintaining good clarity, presence and extension. Feels more balanced in the sound picture.

Mid bass has the least changes – slappy, fast, dynamic and tight, while the lower bass has been slightly brought forward and the presence is now larger, to my ears. The original MP145 was pretty warm already, due to the elevated bass exposure, but MP145 Pro is another step forward towards bassheads. It is not enormous – just larger than expected for planar IEMs with good control and fast decay. Not smudgy.

So, while the nature/timbre/signature of the MP145 Pro and the og version sound stay close, some obvious changes were made, most notable on refined, less edgy treble and slightly amplified bass. My verdict is that those changes are for good, since IEMs sound wider and smoother in overall, exposing planar advantages and keeping the rest of the prime characteristics untouched.

I also like the synergy of AP80 PRO MAX & MP145 PRO pair. Having more powerful balanced output with 4.4mm plug allows AP80 PRO MAX to reveal planar IEMs potential sonically, with more robust and secure physical connection between the two. Along with more drivability, balanced port also eliminates more noise on the background, slightly widens stereo panorama and separates channels better. The amount of output power is enough even at SE 3.5mm plug, but feels like there is more room ahead on balanced output that positively affects the dynamic range in overall.

Conclusion:

My collection of planar magnetic IEMs grows. While the choice is still quite limited, rare products that are available shape this segment and deliver impressive results. It is obvious that Hidizs is concerning this technology as the cutting edge and investing its time and efforts to bring each single products in this niche close to the entire excellence. This is a flagship model with all positive outcomes of such treatment. Furthermore, this is the 2nd gen release, all rough edges indicated by the auditory are now polished. With MP145 Pro release Hidizs literally declares that feedback matters and that their community response shapes the future. As to the product itself – MP145 Pro IEMs have matured technically, ergonomically, in connectivity and, what is the most important, in its refined, more delicate sound.

MP145 Pro are planned to be released at Kickstarter on March 5th, 2026, 10:30AM EST. Prices are planned as follows:

Limited Super Early Bird

• MP145 PRO: $159.00 (Only 300 Units)
• MP145 PRO + AP80 PRO MAX: $338.00 (Kindly share the combo if you think it’s worth to get.)

Early Bird

• MP145 PRO: $169.00

Limited Special Edition

• Titianium Alloy Special Edition: $299.00 (Only 299 Units Worldwide)

Link to the MP145 Pro official page: LINK

Click NOTIFY ME AT LAUNCH to receive the news when MP145 Pro would become available at Kickstarter

Additional link to Hidizs and WDC social media:

Hidizs:
FB: https://www.facebook.com/hidizs/
Ins: https://www.instagram.com/hidizs/
X: https://x.com/Hidizs
Tiktok: https://www.tiktok.com/@hidizs.official

WDC North America
Whale and Dolphin Conservation (WDC)：https://us.whales.org/about/

Facebook: Whale and Dolphin Conservation
https://www.facebook.com/uswhalesorg/

Instagram: whales_org
https://www.instagram.com/whales_org/

Twitter / X: whales_org
https://x.com/whales_org

Tiktok: whales_org
https://www.tiktok.com/@whales_org

Greeting with the past holiday season to all readers! It is quite late but I am a hostage of circumstances and kind of slow postal services. My sample of the new DAP from Hidizs, Christmas special edition, has arrived only several days ago. Catching up with sharing my thought on this latest incarnation of AP80 DAP lineup which Hidizs released in cooperation with Linsoul.

The latest version possesses PRO MAX suffix now, which, I believe, originates from having 4.4mm balanced output (like in AP80 PRO and PRO-X versions) and the largest screen in this series. Both features were much anticipated and I can conclude that most of my expectations from the next Hidizs DAP were met. I never wanted to have another Android-based DAP due to excessive functionality and battery drain together with quick aging (thanks to constant Android version increments and loss of software compatibility as a result), neither I wanted to have another DAP completely isolated from the network services… So, here it is: AP80 PRO MAX is Linux (HiBy OS) based, with long-lasting battery, Wi-Fi, Bluetooth and network services that are a must this days. And I am very glad that it has 4.4mm balanced output with more power compared to regular 3.5mm jack.

AP80 PRO MAX Full specs:

And damn me, this is really MAX version by far according to current specs. So, what else has changed since PRO and PRO-X:

• Now we have faster and newer CPU
• Display grew from 2.45 inch 480×360 to 2.95 inch 360×640
• MicroSD support up to 2TB
• Bluetooth updated to 5.1
• Has WiFi now (but only 2.4GHz)
• Tidal / Qobuz / DLNA / AirPlay support added
• Single-ended / balanced SNR and dynamic range all became better
• 1300mAh battery instead of 800mAh
• MQA unfolding advanced to 16x type

With all of that, the size and weight increased fractionally. The difference in weight with PRO-X is only 9g (from 72g to 81g) which is an achievement considering how much more we get in a slightly bigger package. The new AP80 PRO MAX still stays one of the smallest DAPs on the market, currently.

Besides the dimensions and weight, I admire so many positive updates over the previous versions of this DAP. Larger screen is what makes the first impression and the new ability to operate with network files and stream music from internet services – that what makes the long term use modern and more versatile.

What is in the box?

I’ve got Christmas edition version which has arrived in a large stylized gift box, together with additional perks inside:

• Thermal gift cup
• Greeting card from Hidizs
• AP80 PRO MAX DAP
• USB-c to A cable
• USB-c to c cable
• Extra set of protective glass for front and back (1 set was pre-applied from the factory)
• Warranty card
• Leather case in a separate small box

This Christmas gift packaging definitely made my day, although arrived a little bit late to the party. But I assume that anyone who got the same edition was happy with its looks and incentives. I would be glad to receive or present such bundle under the Christmas tree. The only small concern was the size – quite large comparing to the DAP itself. But it is logical, since it also holds thermal cup.

Back to the DAP itself: I love the new generation. It is bigger due to larger screen, it is easier to hold in hand due to vertical rectangular form and it is still made of aluminum with complex edge shapes and beautiful finish. More colors were introduced as well. And there is also the most expensive copper special edition version available. I, personally, love the new colors like green and red. My version is green and it definitely emits Christmas vibes.

Back and front both covered with glass that has rounded edges (I believe it was called 3D glass before in smartphones). Touchscreen is now more sensitive and precise – perhaps the screen size adds to this feeling. And the screen itself, with the stated resolution, looks crisp and vibrant. Hidizs didn’t mention IPS this time but I don’t see the difference in colors or view angles with the screens of the previous version where IPS was stated among the specs.

Play, Pause, Next, Previous buttons stayed at their convenient places but what was substantially improved is the size and feel of the crown ring (potentiometer with the knob). It is much larger now, protrudes further from the shell and much easier to operate with one hand when holding this DAP. Finally, I can change the volume without using both of my hands. Another addition is the LED indicator on the right edge that informs about different audio file types more common for Hidizs DACs.

Also want to mention the leather case which is quite handy, has high quality craftsmanship and leaves the right edge with all control elements totally exposed for the ease of use.

In overall, AP80 PRO MAX is much better in hands, much more convenient to operate and similarly excellent in terms of built quality. It new dimensions still make it one of the smallest DAPs on the market but Hidizs has managed to substantially increase user experience with the new shape and larger screen / control elements.

DAP in use:

HiBy OS is common among all Hidizs DAPs and I can’t see much of a difference here. The interface became more responsive due to better CPU and scrolling through 600 songs on my SD card with different file types, with and without album art is not feeling sluggish. Not ideal, bur definitely smoother than on my old AP80.

Haven’t noticed significant changes in OS functionality apart from the new streaming / network abilities and pedometer removal (which was a rudiment function anyway) and the removal of bottom to top slide quick menu that was responsible for fast changes in gain, brightness, volume, etc. But we have the top down menu instead. It has quick network / function toggles, brightness / music play controls now.

The most important audio settings, like gapless, MSEB, filters, volumes, EQ, etc – are all still located in HiBy Music app as before. Such excellent and unique functions for HiBy OS like HiBy Link (when you can totally control you HiBy Music APP from a smartphone or even stream audio from from it to the DAP) – work as expected. I couldn’t check Quboz or Tidal since those are not available in my region, but I’ve checked DLNA and the new Wi-Fi transfer functions. DLNA works as expected – streams audio over local network from DLNA server, while Wi-Fi transfer is the possibility to explore and send files to DAP over the air instead of using card readers or USB connection. It is slower but very convenient – AP80 creates webserver which can be accessed within browser at certain IP address:port which DAP tells you. You would see all files, manage folders and upload / download files.

The only little nuance here is that you should stay on Wi-Fi transfer screen in DAP in order for the function to work. It would shutdown web server as soon as you leave this app page.

Don’t forget that AP80 PRO MAX can be used as USB or Bluetooth bidirectional DAC. And there is a dedicated ASIO DAC driver available for Windows at Hidizs website / download section. It ensures the best audio quality on PC but at a cost of slight delay in sound. I would suggest to use Windows system driver for videos and ASIO for music only.

I left AP80 PRO MAX to drain fully charged battery while advancing through the playlist (mainly flac 24/96 ) and got 8:43 hours of continuous play. Charging back consumed another 1:07 hours. There was some shell heating, but nothing to worry about.

Sound impression:

First of all, I wasn’t expecting any revelations in sound quality compared to all other Hidizs AP80 series DAPs. Literally, we have almost similar architecture with AP80 PRO-X and sightly better (next gen) in comparison to AP80 and AP80 PRO. All built around ESS chips with the sound signature common for Sabre – more on the colder/brighter side, tending to precise, detailed and even “clinical” delivery. Technically, such DAPs, if not tremendously miss-tuned, are very good for monitoring with high resolution and clarity in sound – which is true for all AP80 series, indeed.

Musically, I would always prefer slightly moody and thick approach of AKK delivery. Yes, it is less precise, less detailed and feels like lower-mid oriented, but I love the thickness and timbre more. But, again, when both sources, no matter ESS or AKK, are developed well – you might hear the tonality difference but the rest of the variable sound characteristics would mostly be caused by the end-gear – your headphones / amp / speakers. What I want to say, from my practice (over 10 years, 100 of pairs of IEMs, headphones, amps, DACs and DAPs) – pairing warm dynamic / electrostatic IEMs with AP80 and ESS chip might sound even warmer and thicker than cold BA / piezo IEMs paired with AKK chip. And AP80 series is known for not trying to exaggerate in any FR range, therefore, making it a good and balanced source to pair with any end-gear to hear its influence.

So, back to AP80 PRO MAX – neither single ended port performance nor the BA are distinguishable for me from the whole series. Yes, there are positive changes in SNR and DR figures, but the ability to register such difference is an option for the testing equipment, not human ear (not mine, at least). What I am more aware of when using AP80 PRO MAX after the previous versions is that it lasts longer on a battery charge and it is more convenient to use due to larger screen and volume knob.

Therefore, I wouldn’t say anything new here. Like all previous gens, AP80 PRO MAX is a clean, detailed and balanced audio source with plenty of power to feed tight headphones / IEMs with BA output; regular, but much, much better than your smartphone on single ended port in terms of dynamics, resolution and separation and has brighter / colder tonality common for 99% of DAPs based on ESS chips, no matter the brand. Great source to pair with dynamic, planar, hybrid IEMs or headphones and excellent in resolution for further tube amps/pre-amps.

Conclusion:

Perhaps, the main question is whether AP80 PRO MAX is worth upgrading from the preceding Hidizs DAPs. Definitely yes, if you love the sound and want more convenience in use, longer battery life, network and streaming services. If all of that is not of the highest priority – AP80 PRO-X still nails it at a lower price. Earlier versions would lack more: unreliable 2.5mm BA instead of Pentaconn port in AP80 PRO and only 1 DAC chip for both channels with 3.5mm SE output in the regular and the cheapest AP80. Personally, I think that AP80 PRO MAX is a steal for the price asked, especially if it is a first encounter with Hidizs DAPs and there are no obstacles like possessing any previous versions. For me, finally, it is time to force both of my AP80 and AP80 PRO into retirement and integrate PRO MAX into my lifestyle. More convenient to use, more secure to hold, less straining for eyes, more universal for network and streaming services and similarly good in sound quality.

Link to AP80 PRO MAX at Hidizs official store: LINK

Around four years ago I have encountered NF Audio brand for the first time and put my hands on their lower segment NM2+ single DD IEMs. I was quite impressed with the overall build quality, accurate monitor-like performance and wide sound stage it produced. I’ve rated that model pretty high, especially considering its price. Although, I didn’t dig too much into company profile and its background.

In 2025, after dozens of different IEMs tested, I am coming back to reviewing another NF ACOUS (branding has changed from NF Audio in 2024) model of IEMs – NM25. This is currently a new flagship in PRO series for consumer auditory, priced highest if not to consider custom IEMs that this company offers for the professionals or the demanding end-users. But don’t worry, we are not talking about thousands. MSRP for NM25 is only $199, which makes it a bargain considering all qualities it possess. I would try to clarify and prove this statement further along the text.

First of all, it is the company itself and the background of NF ACOUS that elevates it above other more regular consumer-oriented brands: NF ACOUS has long been dealing with the professional musicians and artists, developing and supplying its models to use it in severe stage environment or/and as monitoring equipment in recording studios. Perhaps, no need to explain how this affects the overall quality imposed on the product, derived from professional use expectations. Here is the list of bands and artists NF ACOUS is already supplying their IEMs to: LINK. Such experience cannot omit bleeding into consumer segment and those signs are noticeable everywhere. More about this later…

Moreover, there were several milestones achieved by the company when they have developed their own BA driver that is used in the most expensive professional-grade custom IEMs along with the drivers from Knowles and Sonion, launched first-for-China electrostatic/BA hybrid IEMs, obtained several VGP awards on different models and even collaborated on stylized IEMs for gamers. What has not changed – the professional market orientation and supply. Custom IEMs with personal STL for further processing to achieve the perfect fit and sound characteristics remain common for NF ACOUS company.

Now, back to NM25 – the new flagship consumer single DD IEMs by NF ACOUS and its declared specs:

• Dimensions: 150 × 132 × 83mm
• Driver: MC2L-100A Dual Magnetic Circuit & Dual-Acoustic Chamber Electronic Tuning Dynamic Driver
• Cable: 0.78mm dual pin 5N Silver Coated OFC
• Sensitivity: 108 dB / mW
• Impedance: 32Ω
• Sound Insulation: 25dB
• Frequency Response: 9-40kHz
• Distortion: < 1%
• Max SPL: 125dB
• Connector: 3.5mm

Among all of the features, wanted to highlight the two, which should be vital for the advanced audio performance: Clutter Trap 2.0 patented technology which is a special physical element of the inner chamber structure that tames the unwanted peaks for smooth sound delivery and the availability of 5 nets and 2 sponges that act as sound dampers (something like an acoustic foam in speakers to calm down sound reflection and back firing).

In the box:

The box itself is capable of making the best first impression: high-quality graphics with embossed elements, contains all technical data, has the counterfeit protection sticker and made of outer thick cover with side opening for the inner main box.

The inner box opens like a book with integrated magnets that hold both sides together. Inside, we have warranty card, IEMs storage bag and 6,35mm adapter on the left and IEMs / audio cable and a set of ear tips on the right. So, the full contents are:

• IEMs
• 0.78mm 2 pin 5N Cable
• User Guide
• Storage bag
• Ear Tips (sizes: MS, S, M, L)
• 3.5-6.35mm Adapter

The design:

The design of NF ACOUS NM25 is another aspect where the attention to details is getting more apparent. NF ACOUS declares aviation grade aluminum with 5-axis CNC production and the additional surface treatment. Most of the surface has rough matt finishing with an eye catching thin polished bezel around the front panel.

The shape is quite complex, with lots of design elements (cutouts for branding, channel indicators, model name, logos on sides even filled with the paint, I bet that this is handmade) that required a lot of the additional CNC machine time to accomplish. This is pretty impressing for the IEMs in such price segment.

Output nozzles are moderately long and covered with aluminum mesh to prevent dust.

One more advantage of NM25 over many other IEMs is resin protective cover around 2pin port for audio cable. This makes the connection sealed, much sturdier and reliable. Pins on the cable end are placed inside the resin housing as well, finalizing the tight and protected fit. 6,35mm to 3,5mm adapter also carries branding, looks good and feels made to serve for a couple of centuries. As to the cable – it is following the design of IEMs, comes with 3.5mm jack protection cover, equipped with aluminum splitter, jack housing and velcro tape.

Another small detail is that all ear tips have some mix of material compound on the inner part that makes it much more convenient to fit on the sound nozzles. Usually, it would take several attempts by an unexperienced user to fit ear tips (made of silicone) on the most of IEMs. But these, that are bundled with NM25, are free of such flaw – fitment can be done in one simple move.

The sound:

First of all – the fit is perfect for me. As it should be for the vast majority of people and such custom-like shape which is the most versatile for everyone. NM25 are neither too big nor too small, as well as the moderately protruding nozzles allow for comfortable placement. Flexible ear guides add to the overall fit reliability and convenience. I could even run and workout wearing NM25 but I am afraid that the aluminum shells with compensation openings would not last long in such scenarios.

In general, NM25 sound tend to colder type of sound where upper mids and treble have extra resolution and extension while lower mids and lows are well developed but slightly more congested. This is not bad at all. The majority of single DD IEMs tend to dark and warm signature to compensate the limitations of DD driver in treble reproduction and poor overall legibility.

Large amount of instruments and fast music genres are weak sides of such type of IEMs. As for NM25 – it is unexpectedly good in both aspects while still doing a good job on mid and low bass. In mids, voices and instruments have this extra clarity due to the influence of highly detailed treble, mid bass has powerful and juicy slap with plenty of volumetric feel, lows stay clearly defined in their boundaries, with adequate texturing and obvious presence. Only the lowest bass is less pronounced and fall off quite quick. Despite extra details and presence, treble or upper mids are not getting distracting or shouty. The excess of extension and tuning is accurately adding to the resolution while keeping high peaks and sibilants under control.

Perhaps, one of the main advantages of NM25, besides its treble and the resulting sound clarity, is the ability to render instruments and voices in the mix separately. Very good separation and handling of each single performer throughout the entire range and great outlining. Everything stays coherent and holds its shape.

Conclusion:

NF ACOUS NM25 is a solid performer and very strong competitor in single DD IEMs segment. Taking into consideration its adequate pricing, excellent build quality, the attention to small details as a legacy deriving from professional-oriented manufacturing, rich box contents, good fit and unexpectedly clear and highly coherent sound – NM25 aiming for the highest nomination. At least from my side. Additionally, less common tuning for single DD with the orientation towards bright signature makes NM25 quite unique and interesting. Best for pairing with a dedicated DAC/DAPs based on AKK chips or with tube amplifiers.

NF ACOUS NM25 available at AMAZON US, AliExpress and a list of distributors.

Official page: LINK

Hidizs is recently being very productive. I’ve had pleasing experience with MS2 PRO and MK12 Turris lately, and here goes MK10 – new single dynamic driver IEMs. (By the way, if you didn’t know yet: Hidizs has revealed highly anticipated new gen AP8o PRO MAX DAP which would launch soon).

Truly speaking, I am a great fan of single DD IEMs since the launch of Tanchjim Oxygen, which were and still stay one of the best of its kind, no matter the budget. It had some design flaws and couldn’t provide the same level of comfort for everyone but the lucky ones were converted forever. Knowing that a single diaphragm, the most simple in nature, is capable of handling all frequencies brilliantly and deliver that much of details was shocking. I still have it in my possession despite the time passed. Hidizs, on their turn, promise as brilliant performance by incorporating modern silicon carbide crystal diaphragm materials, ergonomic design with zinc-alloy shells, thorough T.H2019 tuning and additional add-on filters. Sound section and the conclusion to this review would reveal whether such features and approach are enough for MK10 ArcSonics to become my new personal single DD king.

MK10 specs:

Features:

Tuning (filters + H2019 target):

MK10 would be available in two colors: black and silver, both would have mirror polish finish. And there would be 2 cable options: 3.5mm SE and 4.4mm BL. Remember that you can always use 3.5mm SE -> 4.4mm BL adapter but not vise-versa. Therefore, 3.5mm version would be more versatile for use across different devices. In case if you order 4.4mm BL version and want to use MK10 with 3.5mm SE output on phone, laptop or other equipment – you would have to get another high-quality cable with 3.5mm SE jack and 2-pin 0,78mm IEM connectors.

Box contents are traditionally rich for this brand: you’d get IEMs, high-quality audio cable with protective tip, leather pouch with satisfying magnetic mechanism, 3 pairs of ear tips and 3 pairs of tuning filters in a separate storage. I am still wondering when brands would switch to a single audio cable with exchangeable jacks to supply each IEMs with all types of connectors. Such cables already exist and it would make the package even more premium. But even without it, when I am showing the box and its contents to my colleagues at work (they are not familiar with such stuff) – Hidizs products always get lots of praises for premium look and first tactile encounters. Perfect gift, literally for anyone.

The design:

Impressive. As always. Hidizs, this time, took the inspiration from Iron Man’s armor and resembled it in the face plates of the zinc-alloy shells. Reminds me of his face mask. Perfect mirror polishing makes it shiny and attractive. I’ve got silver version but I bet that dark one would look even more gorgeous. The flip side, though, is that it also attracts all fingerprints…

Shells are not unibody, consisting of two parts with thin and accurate gap. Shells also enclose couple of compensational openings, moderately protruding nozzles that end up with the add-on tuning filters, embedded 2-pin 0.78mm ports and R/L channel indicators. Each of the 3 pairs of tuning filters has an color indicator ring on the threaded side that corresponds to red (warm mids), silver (crispy treble), black (rich bass).

In terms of ergonomics, MK10 are designed to fit the majority. No sharp edges or fancy stuff, ear guides on cable, moderately long nozzles. Weight is 12g per ear. Definitely much better than the original Oxygen with its less ergonomic form and, especially, very short nozzles that had given a lot of troubles to their owners. I still wouldn’t recommend to use MK10 during workouts – no IP protection and not defined reaction of zinc-alloy and sweat in a long-term. Plus, feels a little bit more bulky to me, in comparison to IEMs made of resin or plastic.

The sound:

Testing with Hidizs AP80 DAP & Motorolla RAZR 50 Ultra smartphone.

First of all, with 32Ohms impedance / 115dB sensitivity MK10 are quite easy to drive from any tested source. Tried even with the bare notebook output and the volume level is far too high to withstand. It doesn’t mean that the dynamics is good with such mere source but it is getting too loud, at least. Second, common to all high-quality IEMs with fast and responsive diaphragm – it is susceptible to picking up and deliver all record quality imperfections which in the combination with such sensitivity might also emphasize more ground noise. The better the source and record quality are – the more MK10 potential is disclosed, free of negative nuances.

The difference in the provided sound filters is not overwhelming but obvious. I’ve tried with all of them and stayed on red (warm and pronounced mids) as the most balanced one to my liking. Silver accents sibilants with lower quality recordings on both female and male vocals while black widens bass portion that is already present in full extent, if not more.

Even with the most balanced filter on, MK10 definitely have V-shaped sound representation. Not extreme, but making each composition more engaging and expressive. Vocals don’t get obscured by lows, mid bass or treble but the bass and mid bass definitely play a major role on the stage. Lows sound accurately outlined and blend well into the entire sound picture and their slightly exaggerated amount makes MK10 a good choice for the people hungry for bass. Mid bass has excellent dynamics, with tight hit and proper mix of lows and upper mids. I wouldn’t say that lows sound very resolving, though. More resolution comes from mids and treble. Vocals, string / wind instruments expose microdetails better and demonstrates the possibilities of fast modern dynamic driver membrane. Great separation and layering of instruments across the entire range also depicts from that. Treble portion is accurate as well, not as crisp and detailed in comparison to BA drivers, but sparkling and clear enough to balance other ranges and add to the overall resolution. It is not as cold and clinical, thus the entire sound leans to the warmer side.

In overall: MK10 ArcSonics sound signature tends to stay slightly warm in many genres, except instrumentals, orchestra and female vocals where the amount of upper mids and treble is larger initially. I would say that MK10 are better off staying in this warmth, therefore, some genres like blues, rock, rap, hip hop, etc – are more suitable. Genres with the large amount of instruments in upper mids (metal, orchestra) are pleasantly clear and resolving but might sound a little shouty and cold.

So, did Tanchjim Oxygen get beaten? Not quite. Hidizs MK10 definitely have better ergonomics, features, higher resolution and better performance on lows but it lacks the transparency, airiness and overall delicacy that Oxygen once presented. MK10 sound more masculine and straight-forward, which is good in many ways, whereas Oxygens were less strict and detailed but more musical. The difference is like it was with Moondrop Kanas Pro. I would say that Kanas Pro and MK10 are close in sound. Unfortunately for Oxygen’s, their ergonomics crossed out most of its sound virtues since many couldn’t get it to fit right and get the experience… Hidizs MK10 are free of such design flaws while getting close in sound quality.

Conclusion:

Single DD IEMs are still staying my favorite. Being good representative, Hidizs MK10 proves this point for me once again. I had lot of experience with planars lately, almost shifted forever to those, but single DD’s are really easier to drive, less expensive and less susceptible to the quality of audio source or recording. Despite that, I still recommend to stick to external amps and forget low quality mp3s even with single DD IEMSs like MK10… Imagine what happens to more demanding magnetic-planars when paired with noisy / low power output. As a consequence, MK10, with its ergonomics, quite balanced / polished sound and high sensitivity, have much better chances to accompany me throughout each day.

Hidizs MK10 ArcSonics would be launched on KickStarter on 25th of September. Great chance to join and get it with the significant early bird discount.

Link to MK10 ArcSonics at Hidizs official store: LINK

Here is the link where MK10 would also be available at launch: LINK

Hidizs has already brought us hybrid IEMs built on 1 in-house dynamic and 1 Knowles 33518 BA driver with good price to performance ratio couple of years ago. Today I would review their latest offering – MS2 Pro – which, while sharing the similar 1 DD + 1 BA hybrid formula, is further ahead with its design, materials and technical construction of both drivers. Dynamic driver uses their latest 10.2mm PU+PEEK Composite Diaphragm and the BA is not from Knowles, but Hidizs’ own Silvercore unit (not much known about it yet, apart from it being a part of the IEMs itself). Moreover, as a standard feature for all the latest Hidizs offerings – MS2 Pro IEMs come with the possibility of personal sound tuning with the bundled pneumatic filters. Official description of the product mentions lots of effort invested by Hidizs team into the initial process of factory sound refinement through the design of the shells, choice of materials and endless hours of tweaks in a quiet room (which they have, indeed). Quite good background for the success…

What I can tell for sure – I like MS2 PRO from the first glance and mostly due to its design choices. Sound-wise – look for the impressions below in this article.

The specs:

Some highlighted features:

• 10.2mm Dual-Magnetic Circuit & Dual-Cavity Hybrid Driver
• Powerful Energy Dynamic Driver for Deep Bass
• HIDIZS Silvercore BA High-Frequency Balanced Armature Driver
• Aerospace-Grade PU+PEEK Composite Diaphragm with Nano-Scale DLC Coating
• N52-Grade Internal and External Dual-Magnetic Circuits
• Rhino-Inspired Design
• ZA12 Zinc Alloy Integrated Molding
• Mirror-Finish Shell Design with Leather Panel
• High-Purity Silver-Plated OFC Hybrid Wire Cable
• HIDIZS Pneumatic Sound Tuning Filter
• 111dB Sensitivity | 17Ω Impedance | 109dB Dynamic
• 3.5mm or 4.4mm Cable Optional
• 0.78mm 2-Pin Detachable Connector
• Ergonomics Design with Comfortable Extended Wear
• Ergonomics Liquid Silicone Ear Tips
• Customized Pouch for MS2 PRO
• Target H-2019 Curve & HIDIZS Style Professional Tuning
• Hi-Res Certified

In the box:

Traditionally for Hidizs latest products, MS2 Pro comes in a small black neat box with high-quality prints and full list of specs. The box is wrapped in a transparent layer of plastics which protects it from scratches and dirt.

Inner compartment has couple of layers – soft foam holding IEMs on top and all of the accessories stored at the bottom. The cable (3.5mm or 4.4mm option), soft pouch with magnetic mechanism, 2 sets of ear tips and 3 pair of tuning filters are included.

Design and ergonomics:

The very first that I like about the new IEMs – its design. For me, personally, polished and shiny edges combined with leather is a win. Looks distinctive and fresh. I’ve got black leather version, among the three choices that would be available, the most uniform and strict. But I wouldn’t mind to go with either of those and have more accent on its looks with orange or blue options. All look great. And this additional and functional element on the faceplate, covered with bronze grill, is an accurate and precisely crafted opening for dynamic driver movement compensation really makes IEMs look very unique.

Sound output nozzles don’t protrude too far from the shells but in combination with universally ergonomic form and flexible ear guides on the cable – MS2 Pro fit quiet nice and shouldn’t give any trouble to the vast majority in this respect. I wouldn’t recommend it for workouts since there are openings on the back as well, but activities with no incoming sweat or moisture should be totally fine fit-wise.

Cable is traditionally braided, equipped with aluminum audio jack and splitter housings, bending protection, flexible ear guides, channel indication and standard 2pin, 0,78mm detachable connector with transparent resin housings. Never had an issue with audio cables from Hidizs, but if someone would like to switch to something as thick as the elephant foot – you’re welcome. I bet this connector type would handle

Now, the sound:

Tested with Hidizs AP80 Pro / Motorolla RAZR 50 Ultra and neutral sound filters.

MS2 PRO IEMs are definitely easy to drive, no matter the source. 111dB sensitivity and 17Ohms impedance combination is an easy obstacle even for a smartphone with the bare audio output and no pre-amplification. It would also mean high volume levels, enough for the loud environment and more dynamics with low-powered sources. This is an advantage for the casual listening on the go, but I would prefer more tough load in case if I want the best possible quality when combined with high-powered amplifier at home. My tube amp is driving MS2 Pro mad even at 15% volume with gain set to low.

What i really like in MS2 Pro sound is how well it handles lows together with the energetics of mid bass. There is an apparent V-shaped curve, not very dipped though. Just enough to bring up moderately deep bass which enriches mids and makes the stage wider. And the best part is that the treble, despite being generated by BA driver, is served well for the sound to be complete, but not cold or bright. It really helps mid bass with the dynamics, mids/volcal/strings with resolution but the whole sound doesn’t get clinical or shouty. Neither it is prone to unpleasant sibilants.

My only 2 concerns for the sound of MS2 Pro are the lack of deep overtones in mids that would contribute to warm timbre which I love in Hidizs MP145 or MP143 planar IEMs, for instance. And that MS2 Pro, being easy to drive and equipped with BA unit, are very susceptible to the lower recording quality – all tiny imperfections are picked and delivered right to your ears.

As to the imaginary stage – it is moderately wide and deep, with good amount of instrument and channel separation, their obvious dimensional placement but on slightly congested virtual stage.

In overall, MS2 Pro sound quite neutral in timbre, not cold or warm, with slight tendency towards lows and upper mids (V-shape) and slightly recessed but detailed treble. I did enjoy listening to every music genre, apart from classics which requires more flat tuning to exhibit all instruments more even.

Conclusion:

Personally, I treat Hidizs MS2 Pro as a win concerning the design, materials, initial sound tuning and bundled accessories. I love the appearance and ergonomics as much as I admire its thorough and accurate initial sound tuning. It is a decent performer, especially for everyday use in a combination with regular audio sources like a smartphone or portable USB amp. High volume level, slightly V-shaped AFR, universal for different music genres, sounding quite neutral – good option to go easy on ears all day long. As for the serious music fans or audiophiles – there are some limitations to consider if to be paired with more powerful equipment.

Link to the official Hidizs store: LINK

Availability and pricing:

Launch Date: August 7th, 10:30 AM EST
Available: HIDIZS Official Website & Amazon (US, CA, JP, UK, FR, ES)

On hidizs.net
Limited Flash Deal: $69 (MSRP: $99) – 30% OFF
Launch Promo: $79 (MSRP: $99) – 20% OFF
Purchase Link

On Amazon
US : $75.99 LINK
CA : CA$104.39 LINK
JP : ¥11,339 LINK
UK : £62.99 LINK
FR : €80.99 LINK
ES : €80.99 LINK

Hidizs has recently introduced a new and the most advanced single dynamic driver IEM model that builds upon the strengths of its predecessors and brand experience, while aiming for a higher price segment. This latest release, named MK12 Turris, brings a totally new, extra lightweight, yet powerful, magnesium diaphragm, delivering balanced and precise sound. By the end of this review, we should be able to confirm or challenge this assumption. This release reminds me of a vibe when Hidizs introduced their Mermaid series for the first time, with lots of sound tuning options and ambitious declarations. That series was proven a success, thus, expecting similar from MK12.

Hidizs MK12 Turris Technical Specifications:

• Type: singe dd IEMs
• Dynamic driver: 12mm
• Diaphragm: 91% Pure Magnesium M-Shaped Dome Diaphragm
• Frequency range: 10Hz – 45kHz
• Impedance: 32Ω
• Sensitivity: 111dB
• Distortion: <0.3%
• Cable connectors: 2-pin, 0.78mm
• Audio cables: 3,5mm or 4.4mm, high-purity silver-plated oxygen-free copper

Other Declared Features

The 91% Pure Magnesium diaphragm enhances transient response, accuracy, and frequency range, surpassing traditional aluminum-magnesium and lithium-magnesium membranes.

• The outer shells are one-piece CNC-machined aluminum alloy
• Inspired by the Turritopsis dohrnii jellyfish, the design merges evolutionary resilience with modern acoustic engineering
• Three pneumatic tuning filters allow users to customize sound across nine different styles, catering to highs, balanced tones, and bass preferences
• The MK12 Turris’ lightweight design and precise weight distribution, with each earphone weighing below 10g (excluding cable), ensures a stable and comfortable fit. No extra headphone burden, allowing for long-lasting, burden-free listening pleasure.

Hidizs MK12 Turris is aiming to become a revolutionary addition to the market, offering high-end audio precision at much more affordable cost compared to counterparts that utilize magnesium diaphragms. The combination of customizable tuning filters, ultra-lightweight design and the latest diaphragm technology, promises a lot for severe audio enthusiasts as well as for the casual listeners.

Box and contents:

MK12 Turris arrives in a sleek, minimalist packaging—an understated yet elegant grey rectangular box featuring the brand name, logo, diaphragm description and its picture on the facing side.

Inside, the packaging is divided into three layers:

• A top compartment that holds IEMs
• A middle layer securing eartips
• A bottom section containing the rest of accessories

Box Contents:

Hidizs has ensured a rich selection of accessories, making the MK12 Turris a versatile option straight out of the box:

• MK12 Turris IEMs
• audio cable (3.5mm or 4.4mm based on the purchase option)
• 9 pairs (3 types x 3 sizes) of ear tips
• 3 pairs of audio tuning filters (high, balanced, low frequency)
• pouch bag
• Warranty card
• Short user guide

One of the standout features is the inclusion of the additional sound tuning filters from the factory—something rarely seen in IEM packaging but already quite common for the latest releases from Hidizs. This enhances usability across different scenarios, encouraging anyone to test sound variations and to find the best one for own liking. Rich set of exchangeable ear tips also help a lot to fine tune further and to find the best possible fit.

The included pouch bag is also a welcome accessory, offering some additional practicality. It features stiff magnetic mechanism that secures the possessions.

MK12 Turris Design & Build

The MK12 Turris shells are crafted from CNC-machined aluminum alloy, ensuring precision, durability, and seamless construction. Looks gorgeous, feels very premium. Yes, at the first glance they make some bulky appearance but in fact – each weights less that 10g which ends up in good and comfortable fit.

The top cover features the design that is inspired by Turritopsis dohrnii jellyfish while the sides and the bottom left flat. Fine ground surface details catch reflections beautifully—creating a luxurious aesthetic but not too shiny (thanks to the matt finish). Compensation openings for the dynamic driver are at place, those are not diver-friendly :), but ensure the optimized airflow and acoustic performance. Channel indicator are present. Output nozzles are pretty short, feature inner thread to attach audio filters. 2-pin, 0.78mm cable connectors provide a tight and secure fit, eliminating any free play or rattling of the cable.

Final Thoughts

The MK12 Turris embodies a minimalist yet refined design, with exceptional craftsmanship and premium materials that corresponds to its higher-end positioning. Aluminum alloy and its precise machining contributes to striking appearance, making it very appealing in terms of design. I like it. IEMs has turned to masterpieces in its design and specs long ago, and MK12 is not an exception.

Fit & Comfort:

At first glance, one might assume that the MK12 Turris would feel heavy due to its CNC-machined aluminum alloy shells and slightly bulky appearance. However, this concern quickly diminishes thanks to its custom-type shape, short nozzles and overall ergonomics. MK12 Turris shares a similar profile with other well-fitting models, making it effortless to wear for extended periods. Once in place, the IEMs become almost imperceptible, allowing for long listening sessions without discomfort. Additionally, the noise isolation surpasses the average, effectively blocking out external distractions.

Sound Characteristics of Hidizs MK12 Turris

Tested with Hidizs AP80, Motorola RAZR 50 Ultra. All impressions are described using balanced (rose gold) filters and balanced ear tips.

Lows and Midbass:

One of the standout qualities of the MK12 Turris is its ability to precisely resolve and delicately present the lower frequencies. Unlike bass-heavy IEMs that emphasize low-end dominance, the MK12 Turris takes a balanced approach, ensuring deep bass extension while maintaining exceptional clarity and texture. The bass reaches the lowest registers with defined contours and fast decay, avoiding any interference with mids or treble. This range is not artificially boosted, yet remains consistently present, enriching the overall sound and expanding the perceived stage width. Midbass is tight, punchy, and well-articulated, delivering natural drum reproduction with ample air and impact. Unlike hybrid IEMs, where treble influence can sometimes thin out the lower frequencies, the MK12 Turris adds weight to lower reverbs.

Mids and Vocals:

The midrange takes center stage, offering rich, full-bodied vocals with excellent resolution. Both male and female vocals sound natural, expressive, and slightly warm, with no noticeable imbalance between them. Female vocals benefit from lower treble presence, but thanks to the dynamic driver, there’s no excessive brightness or harshness. Instruments within this range maintain high detail retrieval, reminiscent of well-tuned balanced armature IEMs. Electric guitars and other instruments sound full-bodied, with natural harmonics that enhance realism. Additionally, instrument separation is impressive, contributing to significant stage depth and a layered presentation.

Treble:

The treble is clear and well-balanced with the mids, offering slightly more presence than the lows. While extension, resolution, and micro-dynamics are imressive for a single dynamic driver, they are not as sparkling or vivid as those found in balanced armature models. Most of the treble detail is concentrated in the lower treble, adding transparency and airiness to the sound. This range is precisely controlled, ensuring accuracy without fatigue, making long listening sessions enjoyable. There are no piercing frequencies, excessive sharpness, or sibilance issues, making the MK12 Turris a smooth yet detailed performer.

Soundstage:

The MK12 Turris excels in soundstage presentation, offering one of the most expansive imaging experiences among dynamic driver IEMs. With excellent instrument separation, wide spatial distribution, and deep layering, the MK12 Turris creates a convincing sense of space. The lows and treble contribute to the openness, while vocals remain forward, ensuring a well-balanced and immersive experience.

Overall Sound Signature:

The MK12 Turris can be described as well-balanced, with a slight emphasis on mids and vocals. It exhibits highly textured lows, high clarity treble and natural tonality.

Its versatility makes it suitable for a wide range of genres, including heavy metal and rap, thanks to its accurate bass delivery rather than exaggerated low-end emphasis. However, bass enthusiasts seeking extreme sub-bass dominance may find it more refined than overpowering.

It is getting very close in its sound to the latest planar offerings from Hidizs. Never thought that single DD can be so gathered up in the perception of transient response, speed and overall accuracy. Bleeding here is not a problem and it is getting hard to guess which tech is in your ears at a certain moment.

Conclusion

Three key attributes define the Hidizs MK12 Turris throughout this review: precision, responsiveness and clarity. These qualities extend beyond just the sound, resembling in design and craftsmanship as well. While the MK12 Turris may not rely on flashy aesthetics, its close-to-minimalist approach, flawless construction, and ergonomic shape ensure the mature approach of the developers. This approach carries over into its sound, where each range is delivered with accuracy and in a good balance, resulting in a neutral tonality and expansive soundstage.

In overall, MK12 Turris stands out as a well-rounded and sophisticated dynamic driver IEM, impressing with its sound characteristics, build quality, and balanced tuning. Furthermore, box contents allow for further personal experiments with the sound. For those seeking a great product in single DD category, it would be difficult to find a better match…

Additional information about the launch date and prices:

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

Pricing Details:

** MK12 Turris – VIP Exclusive – Limited 200 units only!
Pay a $10 deposit now to secure MK12 Turris for just $109 (MSRP: $199)!
Deposit link: LINK

• The $10 deposit promotion for the MK12 Turris will go live from May 26th to June 9th. Feel free to share on your social media.
  (Note: The deposit link is not yet active—stay tuned for updates!)

How it works:
VIP members pay a $10 deposit to lock in this exclusive price.
On Kickstarter launch day, you’ll receive a secret link via email to complete your purchase.

** Limited Super Early Bird (300 units only!)
MK12 Turris: $129.00 (MSRP: $199.00)
MK12 Turris + S8 Pro Robin: $179.99 (MSRP: $298.00)

** Early Bird
MK12 Turris: $139.00 (MSRP: $199.00)
Limited Gradient-Tint Titanium Alloy Edition – 499pcs worldwide: $229.00 (MSRP: $299.00)

Kickstarter Link: LINK

What I have personally learned since 2019 when the first Dethonray product was presented to this world – is that this brand and Anson Tse, who is standing behind it as the main inspiring individual, would stay very distinguished, focusing on stellar sound quality rather than the amount of features. The first DTR1 DAP was a masterpiece in sound and its resolution / detalization but looked like a monk among popes in comparison to other existing DAPs most of which were based on Android or HiBY OS, packed with additional streaming, reading, gaming and other functions, if not talking about bigger screens, touch interfaces, etc. Whereas DTR1, as well as its successor (DTR1+), incorporated simplified Linux-based OS, lightweight music player and old-style button control. Nevertheless, both are my favorites and no brainers when someone asks about the best sounding DAPs around.

Along with DAPs, Dethonray has a line of well-respected portable DAC/AMPs, including Pegasus (BT only option), table top AMP and a set of planar IEMs. Never had a possibility to put my hands on amp or other products, except both DAPs, Pegasus BT dac/amp and Tender 1 planar IEMs. The latter two are similarly exceptional in terms of sound quality and perfect picks in my own paradigm. Although, there were some technical concerns coming from the owners of Pegasus about its software-emulation of volume button algorithm. Personally, I didn’t experience any inconvenience, knowing that such approach is a trade off for omitting mechanical potentiometer possible rustles in future. I had this happened to various equipment of mine, including guitars, electronics and, even, gaming controllers and I am glad that Anson has made this impossible in his devices.

So, what makes Dethonray products so distinguishable? As for me, there are three factors contributing to that:

• DPPU (Desktop Plus Power Unit): dual high-density battery customized power system, separation of analog and digital circuitry power resulting in less noise

This power system is in core of all Dethonray products, which, as I can remember, was kind of pioneer approach in portable audio by Anson that forced other companies to review their circuitry as well since it delivered better performance.

• The choice of DAC/AMP chips: AKK is instead of ESS which results in thicker and more natural timbre

In particular, Clarinet DAC chip is AK4493S, accompanied by AK4118K (digital audio 24bit/192kHz transceiver, responsible for COAX, Optical input processing) and OPA 1612 op-amps on the output end. All of those are well-known high-grade and quality components that dedicate much to the resulting sound quality.

• Keep it simple approach, focus on audio quality: minimum functions but precise focus on the main purpose

Perhaps, this is the most important – instead of integrating some common OS like Android and fighting its processing / EQ and/or incorporating all types of streaming, apps and hardware components that should be available in such device and that would definitely require much more shielding to eliminate the excessive noise to a certain extent, Dethonray products are kept simple to completely avoid any type of potential hazard to the sound. You wanted to have a perfect audio source – well, here it is, not for reading, games, streaming or pace calculation – only the bit-perfect, high quality processing, nothing more.

So, here are the declared specs:

Apart from what is stated above, there are some additional features that comes handy in using this device. For example, Clarinet has 2 USB type-C ports, separate for USB DAC input and charging functions. This allows to omit charging during USB DAC use and completely exclude any possible noise from this process, or to have charging simultaneously for infinite usage. Although it is great, I would say that it still lacks the function of completely excluding the use of battery from this equation and staying on external power just to preserve battery degradation if Clarinet is planned as a part of desktop setup. I’ve seen such solutions from xDuoo, for instance, and I think that this might make such devices even more versatile.

Along with dual USB port, we have Low / High GAIN switch to adapt different types of connected end gear, front and back status multicolor LEDs to indicate working state / media quality / discharge state (front) and charge state (back), as well as the ability to choose between the two firmware versions with different sound signature (Serenade for cleaner and brighter sound, Rhapsody, default, for thicker and more mellow sound). More info on LED states is stated in the user manual.

Back to the design and first impressions:

Clarinet came in a regular Dethonray thick cardboard box, minimalistic in design but secure for handling. Box contains the unit itself, USB type-C to USB A cable and user manual.

Similar to Pegasus, Clarinet looks clean in it design, feels as a very solid brick and incorporates one-piece aluminum chassis with excellent heat dissipation ability during its usage. I like that Anson designed it so simple, with rough forms and minimal accents it attracts more than it design-oriented rivals. Simple forms and such clinical look belong to hi-end gear more often than plateresque approach in the design. The only accented element is the volume knob in violet with grippy surface pattern which is totally logical since it does all the job – turns the device on and off and changes the volume. Soft but noticeable click tuns on the device at the beginning of travel and uses the rest of it for smooth volume control. I haven’t spotted any weird behavior or channel imbalance during its use, neither the linearity can be questioned here. Pretty natural feel for the knob that only imitates the mechanical potentiometer.

Haven’t noticed any substantial heat during use, only in case if charging and data transfer is happening simultaneously. Aluminum case get slightly warm, nothing to worry about.

All of my devices that I’ve tested Clatinet with haven’t had any problems with recognizing it as an external DAC. Even Linux-based HiBY OS in Hidizs AP80 DAP has managed to identify Clarinet as an external sound card and send data to USB port. There is a manual on the official Dethonray website on setting things up to use Clarinet with Foobar and which drivers to use.

The sound:

Clarinet’s tonality feels very natural, tending slightly to darker / mellow sound. No artificial cattle-like and bright spikes, everything is perfectly balanced and smooth. Lows are deep and wide, excellently contoured and textured. Mid-bass is tight and powerful. But both are perfectly balanced and not overshadowing or bleeding into the mids. Mids, on its turn, are highly textured and detailed, in a perfect spot of balance, neither far or very close (at least with the default FW). Its mellow timbre and smooth delivery makes Dethonray Clarinet very pleasing for vocals. No hisses, no sibilants even with sensitive IEMs. As an outcome of such accurate and natural tuning (plus the chips used) treble is totally enough in quantity, transparent and detailed without being accented or declined. Perfect balance for having long listening sessions even with armature driver-based IEMs.

Clarinet builds pretty wide/large virtual soundstage, outperforming any USB type -C dongles and separate DAPs I have in my possession. Quite on par with the best offering from xDuoo – XD05 BAL which have the larges stage I’ve heard in such portable DAC/AMPs. Instrument separation, layering, positioning – all are excellent and adding up to build spacious sound picture more common for full-sized desktop equipment with much higher price tag.

In summary, the sound is good, large, detailed and naturally balanced. It is rich with details, highly textured and very musical for my ears with most of the genres. Especially for my preferences which are 60-90′ rock, pop, blues, metal, etc with high dynamic range and no post-production compression for commercial means, common for modern music. Best synergy was found with magnetic-planar and DD IEMs that either fully-transparent or bring little to no coloration to the sound signature of Clarinet itself.

Conclusion:

Similarly to all Dethonray products, this one is deceivingly portable. Comparable in shape and size to lots of rivals but with unexpectedly large sound, powerful to drive most of power-hungry head gear. The main distinguishing factor for me is its sound signature – smooth, resolving, with rich mids and mellow timbre. It stands much closer to old school tube overtones rather than modern brightness and clinics of ESS-based DACs. Gets even more delightful when paired with real tube amp/preamp before sending it to speakers or headphones. Still, leaves a room for signature change with another firmware if colder sound is a preference. 9 out of 10 for this equipment to Dethonray, where the only missing point resembles the lack of all-time desktop scenario without the use of integrated battery and no possibility to upgrade op-amp chips available with some rivals.

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