BQEYZ FROST: DELICATE CRYSTALS OF REFERENCE SOUND

DISCLAIMER: The BQEYZ Audio team sent us the BQEYZ FROST free of charge for review purposes. We are truly honored and excited as this is our second collaboration with BQEYZ Audio. We humbly like to thank the BQEYZ Audio team for their continuous support to Aural Cafe.

Introduction: -

Today at Aural Cafe, we will be reviewing BQEYZ Audio's latest offering BQEYZ FROST, a hybrid IEM featuring 10mm Dual Cavity dynamic driver along with easy to drive Custom Micro Planar Transducer.

BQEYZ is a Dongguan, China-based Audio brand founded in 2017 under the parenthood of Dongguan Xianchao Acoustic Technology Co., Ltd. Dongguan Xianchao Acoustic Technology Co., Ltd. is a vertically integrated company which not only specializes in the professional independent research but also oversees development, design, production, and sales of audio products. BQEYZ Stands for Best Quality earphones for your Generation and as the name suggests BQEYZ Audio specializes in hi-fi IEMs, earbuds and audio accessories. Over the years BQEYZ Audio has established itself as a reliable and innovative Audio brand, and has launched several IEMs and earbuds, but their spotlight moment came in mid-2019 when they launched ‘SPRING’, the first IEMs from their weather series. BQEYZ Spring was launched in a tri-brid setup that brought together a unique combination of Dynamic, Balanced Armature, and Piezoelectric drivers in a single IEM. As the season and year passed away, BQEYZ also launched innovative IEMs from their ‘Weather’ series, such as WIND, SUMMER, AUTUMN, WINTER and CLOUD, which we at Aural café had the honor to review (https://www.head-fi.org/showcase/bqeyz-cloud.27191/reviews#review-35204).

Today at Aural Cafe we will be reviewing BQEYZ FROST which is BQEYZ AUDIO's latest launch from their weather series. BQEYZ FROST, is a hybrid IEM featuring 10 mm Dual Cavity dynamic driver along with easy to drive Custom Micro Planar Transducer. The team at BQEYZ Audio, on the first glance, seems to have done a solid job when it comes to integrating a high precision 5-axis CNC aluminum silver grey cavity with the slightly Curved transparent ice blue color crystal glass faceplate to bring the project ‘FROST’ into reality. This faceplate of FROST is somewhat special and unique as the BQEYZ Audio team has combined a highly transparent crystal glass with ice blue base to create a jewel-like shine, when light hits it from different angles as a result of which the transparent texture makes the Frost pattern come alive, thereby doing full justice to the ‘FROST’ IEM.

When it comes to technicalities, the BQYEZ FROST embraces a hybrid setup featuring 10 mm Dual Cavity dynamic driver along with easy to drive Custom Micro Planar Transducer to present a balanced sound signature along with high quality resolution. The 10 mm dual cavity dynamic drive features a very high-quality PU+PEEK Composite diaphragm which has been previously used in many hi-end IEMs in recent times. Indeed, PEEK diaphragm has been used in high-end loudspeakers and sound bars for a long time, and it's very recently that we as an audiophile have also seen the implementation of the same in high-end IEMs and headphones. We at Aural Cafe believe that our readers and fellow audiophiles gain a bit of knowledge while reading our reviews so a curious audiophile can click on the following link on to understand as it what makes the PEEK diaphragm special: https://audioxpress.com/article/pee...phragms-and-cones-for-headphones-and-speakers. Coming back to Frost, the 10 mm PU+PEEK Composite diaphragm forms the heart of the Frost as the PEEK Material helps Frost achieve solid rigidity and stability while the PU Material helps in adding the much-needed flexibility and damping proprieties to the Frost sound quality. As per BQEYZ Audio, compared to the single material diaphragm, the composite diaphragm being integrated inside FROST can achieve a better low frequency dive and fuller mid frequency texture with the help of the rigidity of the PEEK material and good elasticity of the PU material, which when working together exudes a strong and stable lows. The combination of double cavity dynamic driver along with 10 mm PU+PEEK Composite diaphragm seems to be a thoughtful implementation by the team at BQEYZ Audio. We at Aural cafe feels that the PU+PEEK composite diaphragm would help Frost, achieve a hi-fi sound quality while the dual cavity will not only add the much needed dynamics in the lows but also helps the dynamic driver achieves a higher transient response thereby helping the dynamic driver to merge seamlessly with the fast transient of the Custom Micro Planar Transducer finally to present an audiophile with a smooth hi-fi sound experience. The tale about Frost internals doesn’t end here as Frost comes infused with a custom micro planar driver along with the 10 mm dual cavity dynamic driver. The micro planar driver, which is quite widely seen in the IEM industry these days, first came into limelight with SEE AUDIO RINKO in 2023. Traditional Planar drivers have been well regarded in the audiophile circle due to their ability to retrieve micro details effortlessly along with ultra-low distortion and top-notch transient response. The Planar driver, through its ultra-thin diaphragm, responds to signal changes quickly and accurately, as a result of which the Planar driver is well respected in the hi-fi industry for a distortion-free hi-fi sound experience. While the traditional planar transducer is difficult to drive, the micro planar driver aims at achieving the superior technicalities of the traditional planar driver, but it is much easier to drive due to their micro size, because of which we have many IEMs around us in 2025 that come with a micro planar transducer. The custom micro planar transducer being integrated into Frost comes with a unique rectangular sound outlet hole to manage the mid-high frequency sibilance and to achieve a natural sound experience as the ‘rectangular’ sound outlet hole has better dispersion and absorption characteristic in a specific sound frequency. The BQEYZ Audio team didn’t specify which driver takes care of which part of the frequency, but we at Aural Cafe feel that the 10 mm dual cavity dynamic driver takes care of the Lows and Lower Mids while the custom micro planar driver is integrated to take care of the upper mid and highs.

BQEYZ FROST retails for 179 USD in the global market.



Specifications: -

Driver: 10mm Dual Cavity Dynamic Driver + Custom Micro Planar Transducer

Diaphragm: PU and PEEK Composite Diaphragm

Impedance: 32 Ω 1kHz ± 10%

Frequency Response: 5Hz - 40kHz

Sensitivity: 113dB@1kHz

Connector: 0.78mm 2-Pin

Wire: Silver-plated Coaxial Mixed Cable

Unboxing Experience, Design & Build: -

As you can see from our unboxing video (

) the BQEYZ FROST arrived in a small black colour cardboard box covered with a whitish grey colour sleeve. The Front side of the sleeve is dominated with the pic of BQEYZ FROST elegantly showing off its FROSTED TEXTURED faceplate along with the IEM model name ‘FROST’ being written on the left side of the IEM. One can also locate the brand name BQEYZ being printed at the top left corner of the sleeve. There is nothing much printed on either side of the box other than burn-in instructions, while the backside of the box is where the FROST technical specifications are printed in English, Chinese, as well as in Japanese language. On removing the whitish grey sleeves, we come across the black colour cardboard box. The brand name ‘BQEYZ’ can be seen embossed right at the center of the box. On opening the box, we come directly across the beautiful frosted textured faceplate of BQEYZ FROST seen through the paper cutout. On the same paper cutout, the model’s name FROST can be seen embossed along with the IEM tech and burn in instructions being embossed in English, Chinese and Japanese dialects. On removing the paper cutout, we can see the FROST IEM being placed neatly with the help of the sponge cutout at the top half of the box, while the other half is where a very functional black colour zipper carrycase is placed. On opening the carry case, we come across the stock cable and the stock accessories and ear tips which Frost comes bundled with. Along with all this, we also come across a small black-colour box placed at the bottom half of the box on opening, which contains the usual instruction manuals. So, all in all, the unboxing experience was quite simple, minimalistic yet functional at the same time.





When it comes to the design language of the FROST IEM shell, it follows the standard metallic build of the earlier BQEYZ IEMs. The Frost’s shells are made from 5-axis CNC aluminum alloy, which is further anodized to make the shell corrosion and wear resistant. All in all, the silver greyish lightweight aluminum shell cavity has good rigidity and stability vis-à-vis helping in reducing the resonance. When it comes to the faceplate, the faceplate is truly a piece of Art. The faceplate is made up of highly transparent crystal glass with an ice blue base, which shines brightly like a gem when illuminated by light at different angles, elegantly showing off its soul pleasing frosted texture. The team at BQEYZ Audio on first glance seems to have done a solid job when it comes to integrating a high precision 5-axis CNC aluminum silver grey cavity with the slightly Curved transparent ice blue color crystal glass faceplate to bring the project “FROST” into reality. On the top of the shell, one can find the slightly recessed two pin sockets along with a rectangular vent to complement the rectangular hole of the custom micro planar driver. On a close look, we also come across vents on the front side of the shell, which might be implemented to manage the air pressure of the dual cavity dynamic driver. The Frost nozzle again exudes a robust metallic and goes well with the all-metallic build of the IEM. While Frost is available both in 3.5 mm and 4.4mm balanced plug, our review unit of Frost arrived with a 3.5mm plug. When it comes to stock cable, the Frost comes with a 1.2-meter single crystal copper silver plated coaxial cable with an ice blue PU sleeve which matches beautifully with the faceplate of the FROST. The BQEYZ team decided to go with the SPC cable using single crystal copper as the base material to maintain the natural and reference sound tonality of the Frost. The coaxial cable design typically has a stable impedance characteristic, which in turn helps in reducing distortion during signal transmission, enabling Frost to achieve a high-fidelity sound quality. On opening the stock carrycase, we are pleasantly surprised by the generous amount of ear tips and accessories which FROST came bundled with. When it comes to ear tips, FROST comes bundled with 1 pair of foam tips. 3 pairs of ‘Atmosphere’ silicone ear tips for powerful bass and 3 pairs of Reference silicone ear tips for better soundstage and mids placed neatly in a high-quality metal ear tips holder, usually found on an expensive set of IEMs along with a tiny brush to clean the nozzle of the IEMs. When it comes to building quality of the shells, the Frost showcases a high quality lightweight metallic shell. Overall, the stock cable, ear tips and accessories are of high quality, doing total justice to the price of the Frost IEM. The included carry case is a thoughtful addition by the team at BQEYZ Audio as it is large enough to comfortably store the IEMs, cable, ear tips, and a small dongle.



When it comes to fit, we at Aural café are a bit unhappy about the fit. The moment we turned on the music and put the FROST IEM inside our ears, we were pleasantly surprised by the true hi fidelity sound quality of the FROST. But our happiness was short-lived as the “standard” design language of the Frost metallic IEM shell was not doing justice to the solid hi-fi sound quality of the Frost. The Frost shell is quite small in size and light in weight, which can fit easily within any size of ear, but the problem lies in the ergonomics of the shell. The nozzle is surprisingly short length, which just doesn’t go well with the overall listening experience. We wished that the BQEYZ had designed a more ergonomic shell, a pseudo custom type shell for Frost as it would take our overall listening experience to a different level. To overcome the problem of short nozzles, one needs to select the ear tips very carefully. When it came to us at Aural café, we went with the medium-sized stock atmospheric (narrow bore) silicone ear tips. When it comes to noise isolation, the Frost IEM shells just provide an average amount of passive isolation, which really improves the moment we started using the stock foam ear tips with the Frost. We feel that the small lightweight aluminum shell is designed by keeping in mind the Chinese and Japanese, which is all fine, but we at Aural café would have gone totally crazy if Frost came with a more ergonomic shell, as it would take the hi-fidelity sound quality of the Frost to another level. We would also like to add here that the lightweight shell along with the beautiful faceplate makes it a piece of gem which a guy can gift to his/her audiophile loved ones.



Sound Analysis: -

We would like to state here that the sound impressions are based on testing FROST with stock ‘Atmosphere’ silicone ear tips along with stock cable. The effect of ‘Reference’ silicone ear tips on BQEYZ FROST’s sound impressions will be dealt separately in the Synergy section, so we would request our fellow readers and audiophiles to go through that section for sure. We would also like to state here that we have kept the BQEYZ FROST under 50 hours of burn-in period before listening to and analyzing the sound quality.

Credits: @atechreviews

Tonality: - After listening to BQEYZ FROST for weeks, we at Aural Cafe can conclude that FROST embraces a very unique reference sound signature which we have previously experienced while testing premium and top of the line IEMs. The dual cavity Dynamic Driver has been thoughtfully implemented by the team at BQEYZ Audio to impart a tinge of warmth and musicality to the overall neutral sound signature. The overall sound signature is slightly warm, totally free flowing and yet stable at the same time thanks to the 10mm PU+PEEK composite diaphragm and clever implementation of vents to manage the air pressure optimally. We at Aural café would also love to add here that the sound signature remains stable and buttery smooth across the sound frequency, which is quite admirable when we take into account the facts that the transient response of the dynamic driver and the micro planar driver is quite different. The dual cavity is optimally used by the BQEYZ Audio team to match the transient response of the dynamic driver with the micro planar driver. There is a slight boost in the mid-bass area, which also adds up, adding a tinge of musicality to the mids. The midrange is where FROST shines brightly. The midrange on Frost is open and spacious along with top notch clarity. The warmth of the lows does help by adding a bit of soul and texture to the vocals, which is a pleasant experience in itself. The Highs on Frost is spacious, free flowing and smooth without any kind of shoutiness all thanks to the very capable custom micro planar driver. When it comes to timbre, the timbre of instruments, especially musical instruments based on strings and cymbals, especially, is very sublime and real. The custom micro planar definitely adds up a unique energy and punch in the upper mids, which is very engaging and fun while listening to 'Hotel California' by Eagles. We feel this kind of reference tonality will go with most genres of soundtracks, but it will sound its best with Jazz and Progressive Rock genre of soundtracks, such as 'Comfortably Numb' by the legendary band Pink Floyd, which we thoroughly enjoyed while using Frost with a warmer source such as Dethonray DTR1+ in our case.

Lows: - The lows on Frost are tuned by keeping the reference tonality of the IEM. The lows on Frost stay clean and tight with a decent body which is fun to enjoy. The role of the Single 10mm PU+PEEK Dynamic Driver comes into the forefront as dynamic drivers are said to do a better job in this part of the frequency in comparison to other types of drivers. The mid-bass speed is top of the line and very engaging all thanks to the double cavity dynamic driver along with the high quality composite diaphragm. Overall, the clarity and dynamics are very good in this part of frequency on the Frost, but we would definitely love a bit better body in the overall low frequencies. When it comes to Sub-bass, the Sub-bass on Frost lacks body and the rumble, we used to enjoy is somewhere missing. The layering is also average, which we felt while listening to ‘Jean du Voyage – Nakshatram’ on the Aune M1p. When it comes to mid-bass, the mid-bass on BQEYZ Frost is clean and tight. While the mid-bass speed is quite precise, the mid-bass punch is good and above average considering the price. We at Aural Cafe would definitely love a bit more body in mid-bass but we just enjoyed listening to ‘Angel’ by Massive Attack and ‘Mombasa’ by legendary composer Hans Zimmer from the movie Inception due to the precise speed and decent dynamics of Frost’s mid-bass.

Mids: - The mids on the Frost are neither forward nor laid back. It sits on the central stage and is one of the strongest points of the same. The vocals showcase top-notch clarity while staying effortlessly spacious. What makes the mids on the Frost a bit special is its reference tonality as the vocals are very rich with decent texture and soul, but when it comes to Vocals’ note weight, it could have been a bit better. The lower mids on Frost are not quite refined and stable, as a result of which, it doesn't do justice while listening to the complex metal and rock numbers. When it comes to the upper mids, the upper mids on the Frost are quite rich and transparent without any hint of shoutiness which we usually see in budget IEMs. We at Aural Café love relaxed soulful tuning as it really aids while listening to blues and Progressive Rock genre soundtracks. So, in this scenario we would love to have a more stable low mids. When it comes to vocal texture, both the male and female vocals showcase top-notch texture, solid, which we thoroughly enjoyed while listening to ‘Rolling in the Deep’ by Adele. When it comes to instruments, the timbre of the instruments is just right at the point. The string/percussion-based instruments, such as Piano, do showcase decent texture on Frost, which we enjoyed while listening to ‘In the Air Tonight-Remastered’ by Phil Collins, but Frost just performs average at best when it comes to woodwind-based instruments.

Highs: - The highs on Frost align with their tonality and are decently bright yet smooth and airy without any kind of harshness. The micro details are not on the face but come in a much more organic way while listening to different genres of music. The highs have sufficient transparency and definition to highlight notational attacks on instruments and vocal articulation thanks to its fast Custom Micro-Planar Driver. The highs have a good amount of energy and sparkle, providing enough liveliness. The upper treble showcases a good amount of details on the Frost while listening to well-mastered rock soundtracks such as ‘Whole Lotta Love’ by Led Zeppelin. We also enjoyed listening to ‘Paayalliya’ composed by Amit Trivedi for the movie Dev D and sung by Shruti Pathak. We are reasonably satisfied by the way the treble is shown on the IEM. The custom micro planar driver has beautifully shown its prowess in this region of sound frequency.

Soundstage & Imaging: - The Soundstage on Frost is decently wide and immersive with a better width in comparison to soundstage depth. While there are a bunch of audiophiles who are into wide and holographic soundstage, at the same time there are also a group of audiophiles including us who are more into intimate and immersive soundstage. BQEYZ Frost will be preferred by the bunch of audiophiles who are into a wider soundstage. The technical performance of Frost is decent considering price. It does a decent job when it comes to retrieving micro details, which come quite organically. The instrument separation quotient of Frost is solid and stable, while the imaging is just average at best. All in all, we at Aural Cafe are looking for more with the technical ability of the Frost, but with consideration of its pricing we think it can be considerable. We also enjoyed listening to ‘Hotel California’ by the legendary Rock Band, Eagles, while assessing the technical proficiency of the BQEYZ Frost.

Synergy: - We at Aural Cafe like to state that we do believe in burn-in and would suggest at least 50 hours of burn-in period to get the best out of the Frost. After the burn, the overall dynamics of the lows became more fun and engaging. When it comes to driving ability, thanks to its micro planar driver, we are happy to communicate that BQEYZ Frost is easy to drive and can be driven easily with the help of a dongle but would suggest using it with a hi-fi source to get the best out of Frost as it has a DD and a Micro-Planar and scales really well with powerful hi-fi portable or desktop sources.



Although it is a 179 USD IEM, we tried it with several sources. We tested Frost with a number of hi-fi DAPs and desktop sources such as Astell and Kern SP1000M, Aune M1p, iFi Hip DAC 3, Dethonray DTR1+, DTR1+ LE, Listening M1, and Clarinet and felt that it matches really well with warm musical sources such as Dethonray DTR1+ and iFi Hip DAC 3 as it complements the reference tonality of the of Frost and also adds a bit of thump to the lows, whereas layering, soundstage and overall sound transparency improved a lot making us feel that we are listening to more expensive IEMs when Frost is driven by hi-end desktop sources such as Dethonray Listening M1 and Aune S17 Pro. Entry-level Desktop sources such as iFi Audio Zen DAC 3 also add a touch of musicality and soul to the overall tonality of the Frost. When it comes to the portable dongles, which are so much in trend, we tested Frost with a line of dongles such as iFi Audio GO Link Max, Aune Yuki, and Celest CD20 and felt that Frost sounded best with iFi Audio GO Link Max. We also tested Frost with several budget and expensive cables across different brands from Rhapsodio, PW Audio, to Linksmith and Linum and felt that Frost performs at its optimum level with Pure Copper cables, which was Rhapsodio Wizard Mk.II in our case. The Copper makes the overall sound a bit smoother and adds a solid amount of body to the lows. We at Aural Cafe do know that it doesn't make sense to match a 1000 US$ cable with 200 US$ IEM but we at Aural Cafe are always curious to test the optimum capability of the transducer in hand and it is due to this curiosity we tested the Frost with most of the cables we had in our cable bank. When it comes to ear tips, we would like to add here that ear tips play a big role in overall sound quality and sound isolation when it comes to BQEYZ Frost. The Frost fits at its best with stock foam ear tips. The sound tonality remains reference and the note weight especially in the low mids area becomes a bit more stable. But when it comes to us at Aural Cafe, we prefer the stock narrow-bore ‘Atmosphere’ ear tips over the Reference Wide Bore silicone ear tips. The narrow bore tips make a sound a bit more fun and engaging while the reference tips help a lot with the mids region where the vocals sound a bit more transparent in comparison to the narrow bore ‘Atmosphere’ silicone ear tips. When it comes to aftermarket ear tips, we felt that Frost performed at its best with Spinfit W1.



Conclusion: -

The moment we put on BQEYZ Frost and turned on the music, we knew it was something special. The double cavity dynamic driver and custom micro planar driver have been thoughtfully implemented by the BQEYZ team, as a result of which an audiophile will feel that he or she is listening to a single DD based IEM instead of hybrid IEMs. The BQEYZ team, while tuning, seems to have made sure that the dynamic and micro planar driver plays a complementary role, as a result of which the sound experience is buttery smooth across the frequency. The unique reference tonality and the artistic ‘FROSTED’ texture faceplate of BQEYZ Frost makes it stand ahead of the other IEMs in this price range. The custom micro planar driver, as well as the vents, make sure that the sound quality stays open and free flowing, which is really an enjoyable experience for us at Aural Cafe. The reference tonality makes Frost go with most genres of soundtracks, but we personally loved listening to blues and progressive rock through Frost. All said the Frost lacks sub-bass in the lows along with just average imaging capability. But if you are somebody out there in the market in search of a lightweight, reference IEM which has top of the line mid bass speed and transient response, then one can easily go for BQEYZ Frost.

Non-Affiliated Link: -
-https://bqeyz.net/products/bqeyz-bq...ar-earphones-hifi-wired-iem-gaming-earbuds-复制
-https://thehificat.com/collections/bqeyz/products/bqeyz-frost