BQEYZ Frost

Fun Fact to start off: BQEYZ stands for Best Quality Earphones for YouZ. It’s almost like BQEYZ has a Brooklyn accent, and that’s awesome. I wish more audio companies had accents. “Youse better wise up and get some BQEYZ in ya ears”

(BQEYZ does not endorse this message.)

Thank you for the review copy, BQEYZ.

Howdy y’all! Submitted for your viewing pleasure today: the BQEYZ Frost. I say “viewing” to begin here because, please flip through the album, the set really wants your attention. The whole electric blue vibe is really fun and distinctive; it would be a sin to unpair that cable from these IEMs. A lot of people in the culinary industry say “You eat with your eyes first.” Well, I feel like a set’s look can sometimes give you an idea of its sound. Thats sorta the case here with this 1 dynamic, 1 micro planar driver hybrid set. But it’s complicated. Let’s check it out.

Look and Feel



The unboxing experience is very solid. Upon opening the box you’ll find the earphones peaking out from their foam nest, their glow beaming bright blue from beneath the glass faceplate. The glass gives the design beneath a sense of needed depth and allows light to reflect off the set from within. This is the first set I’ve ever demoed with a glass faceplate but I must say I like the concept. The cool shimmer of the glass compliments the metallic blue snowflake design beneath. This all sits atop a very nicely CNC’d aluminum shell. Over the last two weeks the earpieces have withstood two completely-intentional, on-purpose, for-science drops from about 3 feet onto a hardwood floor and are thankfully no worse for ware. These rigorous trials have led me to conclude that the build quality is pretty decent.

Yeah that’s a nice cable right there. The electric blue snake the set comes is one of the most perfectly paired stock IEM cables I’ve come across. Sets double the price often don’t come with such a match, so the Frost is definitely picking up some points for style. The cable is slightly, but not overly memory prone while being thick enough not to become tangly. The double helix design is a popular choice these days, and the chrome hardware picks up the snowflakes on the faceplate. I got a 4.4 termination, 3.5 is available as well.





In addition, the IEM comes with 2 sets of silicone eartips (atmosphere and reference), a pair of foam eartips, a hard, roomy case and a little brush. I think it’s a great accessory package for the price, although I can’t speak too much to the quality of the stock eartips. I got them to work just fine, but I have a tendency to tip roll and use my own. Today, Tangzu Tang Sancai Wide Bore.



I measured the nozzles to be 5.7mm wide at their widest point. That’s on the wider side of average, but with the non-intrusive nozzle length I easily found a comfortable fit. Please note- my ears are cavernous. However the set itself is on the more compact side when compared to many hybrid IEMs.

Sound Impressions

There’s reason attention has been called to the mid bass. But what may be just as conspicuous as its mid bass bump is this sets sub bass roll off, leading to a distinctive presentation that may catch you off guard. We’re not here for the Rumble, we’re here for the Slam. Combined with a somewhat sparkly yet unobtrusive treble and a fairly sharp rise in the pinna gain, we’ve been given an impactful and edgy set.

Bass

There’s a decent sub bass roll-off in this sets frequency response from around 50hz to 10hz that really focuses all the attention of the sets dynamic driver into producing a quick, clean mid bass attack the smacks you right in the face with every beat of a kick drum. While we may not hear too much of the lowest frequencies, tracks with lots of sub bass don’t sound anemic. The presentation of the sub bass is a soft backing canvas that makes the mid bass impact all the more affecting.

The mid bass is snappy and resolved. And attack reminiscent of BA Bass with a slower, more familiar DD decay gives the set a natural sound despite its exuberance.



Mids

We’re not really here for the vocals. That’s not to say I didn’t enjoy them, but they sit behind the rest of the presentation just a bit. “Recessed” would not be the word I’d use. Let’s go with “relaxed”. The mid range is warm and open, but it’s missing a bit of the underlying depth more subbass would bring. Male vocals can sound a touch hollow despite the warmth for this reason.

Due to that little upper mid range spike, guitars and stringed instruments are the real stars of the mid range on this set with an energetic delivery that you’ll miss when it’s not around. Female vocals have a fairly strong and defined presence, but the ring of trumpets and whistle of woodwinds tend to take precedence.

Treble

It’s accentuated, yet controlled. Well extended, but comfortable. Some of the best treble I’ve heard from a micro planar driver to be honest. Well resolved with formidable microdetail retrieval, the set boasts a treble that strikes a perfect balance between fidelity and musicality. The big 10k dip followed by a burst of air makes the set feel lively and refreshing. I found a few brighter tracks a touch sibilant, but I didn’t find it much of an issue in general. I found the treble to be the most source-dependent aspect of the Frost. A clean, neutral source is a must for controlled treble on this set. I used a DTC 800 for testing.

Techs

The soundstage is wide and spacious, but it’s not very deep. This leaves you in a slightly more intimate setting, and that sense of closeness is at the heart of this sets impact and energy. I don’t feel like I’m watching the band in the middle of a giant arena. I feel like I’m at an open mic night at a small coffee shop that’s about to get shut down for breaking all the noise ordinances. It’s a set that puts you in the middle of the action.

The demure sub bass and hybrid configuration allow the set a clarity and resolution unmuddied by obtrusive low frequencies. The set had accurate imaging with very adept instrument separation. The set handles busy tracks well for its price range, and I was only able to notice some bass distortion when turning it up to volume levels I should not be listening to music at.



Final Thoughts

I wasn’t really expecting what I got. It’s seems a sub bass roll off is a common feature of the BQEYZ house tuning, and I understand why. The snap and bounce of the mid bass is pretty addicting, and it’s rare to find a mid bass attack that quick outside of all-BA set. I listen to lots of rock, indie rock, pop, jazz and instrumental music. The Frost is great for the majority of my library, but it can sound a bit reserved on tracks that rely on lots of sub bass. If you’re the type that has more than 1 IEM (hey), this may evolve into an invaluable part of your arsenal. It’s not a jack-of-all-trades. It’s more a master of its craft. And that craft is mid bass.

I hope youse enjoyed reading, thanks!

BQEYZ FROST

#Disclaimer:

*As always, with each review I try to improve and better demonstrate my experience as a regular but avid and passionate user!

*If you are looking for a super technical and in-depth analysis, please feel free to look for another review. There are many guys here who have much more knowledge than me and have been doing this for much longer.

*This time, the unit to be reviewed was kindly delivered by BQEYZ Audio in exchange for my honest opinion/review.

*I will try to be as brief as possible, "straight to the point!" And as unbiased as possible.

#Gear Used:

• Celest - CD-20
• EPZ - TP35
• Motorola Edge 50 Pro (UAPP)
• Notebook (Windows), (MusicBee), (Tidal and Apple Music)
• Penon Liqueur O and B (best match), Dunu S&S, Sancai Wide, Whizzer ET100AB, Bamboo Tips, TRN T, SoundCocoon, ddHIFI ST35
• 4.4 bal. Cable, and High Gain as always

#Specs:

Drivers Config: 10mm DD(PU+PEK) + Micro Planar

Sensitivity: 113db

Impedance: 32Ω

Frequency Response Range: 5Hz-40kHz

#Unboxing Experience:

A very good unboxing, without exaggeration. An external sleeve, a shiny black/blue box with magnetic opening.

Foam with the shells themself.

Eartips, are 3 pairs of the atismosphere type (normal bore), 3 pairs of the reference type (wide bore) attached to a very cool metal plate and 1 pair of foam tips in a tiny plastic case.

A beautiful cable, I mean it when I say that BQEYZ did a perfect job to match the shell with the cable. This cable is pure perfection. And a nice quality semi rugged black case

And a quality inspection certificate.

#Overall Build:

The faceplate is made of glass, yes you read that right, crystal clear curved glass! C'mon, what's not to like about that? (and worry about too).

The rest of the shell is made of aluminum alloy in a 5-axis CNC process. A cable that I can assure you right now that you won't find a better match than this stock one, beautifully constructed with two cores in single crystal copper + silver plated.

This same cable was used for the analysis, I see no reason to change it and you don't even think about finding a reason!

As for the eartips, as always, unfortunately the tips that come with most sets, regardless of the brand, don't fit me well and regardless of that, I always try to find the perfect tip for my taste, the tip that I think sound and seal best with the iem and my tiny ears. In this case, Penon's Liqueuor Black.

#Sound Impressions:

I think I got it right when I chose the title for this post, "A True Cold Killer". Okay, maybe I just chose it because it had a pun that didn't quite work. Jokes aside, the sound that comes out of the BQEYZ FROST is all about fast response and recovery, lots of mid-bass, clean vocals and natural mids that are a bit forward, and well resolved, with bright, sparkling, fatigue-free highs.

#Bass:

The bass that comes out of this thing stands out from the competition. There's nothing balanced here, it's all about mid-bass and that's it. Tight, fast and visceral, the punch is felt almost physically. And then you immediately think "there goes the mids, bass bleeding everywhere", no, not this time my friend! Thesse guys and girls from BQEYZ knew exactly what they were doing here, and it's not an easy task, but here it was done almost perfectly. Mid-bass perfectly executed both in quantity and quality and without compromising the mids and vocals.

And the sub bass? Yes, they are present and ready when required, but this time they are just supporting actors.

#Mids/ Vocals:

The vocals are very clean with enough body thanks to the boost in the mid-bass, a little forward, it doesn't leave everything in your face but is more forward.

I didn't find it the most natural, but far from being something strange, for me it just lacked a little bit of liveliness. To top it off, the mids are also clean and well resolved, I tested it with my exclusive Metal playlist and its subgenres, from the 80s to now and it managed to perform excellently even on the fastest tracks, when on very busy tracks FROST can get a little lost, but here it is a nitpick honestly.

#Treble:

Frost's Treble complement the rest of the set, they are detailed, airy, bright with just enouth sparkling, without any noticeable harshness or sharpness enough to cause fatigue to the listener.

I wouldn't say it's on the safer side, I'd say it's enough to be enjoyed with just the right amount of richness and shine.

#Technical Performance and Soundstage:

Frost's technicality stands out for its capacity of detail retrieving, the image, separation and layers are also very good, I wouldn't say it's super, but it's acceptable for the price and the whole set.

The soundstage is more wide than deep, quite decent.

#Overall Verdict:

Honestly, the only cons I could find here were minor things.

The whole set was perfectly tuned with the purpose of getting away from this wave of IEMs that have a high peak in the sub-bass and end up leaving the mids in second place.

I would say it's an almost perfect set for the "Mid-BassHead", yes I'm one of those.

Strong, fast, dynamic, engaging and fun (not in an exaggerated way like BIG V-shaped ones).

Construction that makes sets that are twice the price jealous, one of the best stock cables I've had the pleasure of trying, perfect match with the wonderful shell.

This one will stay in my collection, it's already on my top list for listening metal tracks.


*Again, thanks to BQEYZ Audio for kindly sending me these units.

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ADHD Reviews presents!!
Short attention span reviews for the masses!

BQEYZ Frost!!!

The BQEYZ Frost is a hybrid IEM with two drivers, a Dynamic Driver and a Microplanar. It stands out as an energetic yet detailed in-ear monitor that blends fun and analytical traits—a rare balance that makes it a versatile performer across various genres. With its punchy bass, energetic treble, and clean mids, it handles everything from mellow acoustics to busy metal and electronic tracks without losing details, while keeping everything well separated and engaging.

Bass:
The bass on the Frost is decisively mid-bass focused, delivering a satisfying punch that adds body and rhythm to any track. It's deep without overwhelming the mids, making it perfect for rock, metal, hip-hop, EDM, and more. The sub-bass is present and adequate but not at basshead levels, as I mentioned earlier.

Mids:
Mids are a strong point here: they’re forward, clean, and engaging.
both male and female vocals come through with clarity and warmth, while instruments like guitars and pianos retain good texture. Whether it's an acoustic track or a busy metal mix, the Frost keeps the midrange forward and enjoyable.

Treble:
The treble is smooth but lively and well-extended, giving the sound a sense of air and space without tipping into sibilance or harshness. There's enough sparkle to bring out the details in cymbals, strings, and synths, It plays well with all genres and brings an exciting edge to more complex tracks.

Accessories:



Price/Performance:
I think that the BQEYZ Frost is kicking way above it's price range, a hybrid with drivers that work in cohesion like that is something hard to find, and at this price range it's a no brainer, REALLY.


Conclusion:
BQEYZ Frost is an energetic IEM that offers a rare blend of fun and resolution. Its bass punch, forward mids, and crisp treble make it suitable for nearly any music style, and its ability to manage busy tracks is particularly impressive.
add in a holographic soundstage, and you’ve got a well-rounded IEM that punches above its weight in both musicality and technical performance.



Final words:
I’d like to thank BQEYZ for sending me this IEM for an honest review, I'M LOVING IT! I’m curious to see what new iems they're going to release next, until then I'm gonna keep on rocking with my Frost
you can enjoy it like I do by clicking on the non-affiliated links down below



BQEYZ Website

https://bqeyz.net/products/frost-wired-earphones

BQEYZ Official store(AliExpress)

https://a.aliexpress.com/_okRsnCp

I hope you liked this review, stay tuned for my next reviews by following my profile and don't forget to updoot

BQEYZ Frost and BQEYZ BQ-10 set was provided to me for a review as a part of the Audio Geek EU Tour.

Frost is a hybrid in-ear monitor sporting one dynamic driver and one micro planar driver. It provides warm organic, balanced but also detailed sound signature, with technicalities punching way above it’s price tag. It features a robust metal shell with an attractive glass front plate, reflecting premium craftsmanship

It is by far the most enjoyable IEM I’ve heard so far and the tuning is almost perfect for my taste. It makes a great combo with my Meridian Explorer 2 DAC and is ideal for types of music I am into (mostly 70’s rock) as it provides warm, analog sound. On top of that, I dig the aesthetics of the shell design and the most beautiful shade of blue of the cable! In short: a perfect score.

SOUND:

Fun and immersive sound signature, ideal for extended listening sessions, with plenty of details (second guitar part feedback on “War Pigs” by Black Sabbath - something I don’t think I’ve heard before) and surprisingly (considering the price tag) deep, wide holographic soundstage. It offers a harmonious blend across all frequencies, resulting in a natural and engaging listening experience.

TREBLE:

Detailed, clear and airy with no sign of harshness or sibilance but there’s an occasional shrill on some tracks that sounds a bit artificial and thin, lacking weight (cymbals on “Firth of Fifth” by Genesis). It has quite an extension though that rings out beautifully (just listen to the crash at the start of "Good for you" by Toto), and delivers nice clarity and detail retrieval.

MIDS:

Nice, wholesome, full midrange with valve like ambient, and dense textures. Electric guitars sounding especially wonderful with long fuzzy decays and engaging tone, great for 70's rock (Black Sabbath’s “Sabbra Cadabra” or Led Zeppelin’s “Ten Years Gone”).

Vocals are presented in an intimate and emotional manner with plenty of nuances (“The world Goes On” by Barcley James Harvest, “Breathing” by Kate Bush).

Upper mids are slightly emphasised which makes certain types of music (80's pop and rock acts like Tears for Fears) with their drum machines and synths, a bit too shouty sometimes. No issue for me as I rarely listen to those, and the 60's and 70's stuff, plus some modern well produced albums (Peter Gabriel’s I/O) sound great.

BASS:

I saw some people complaining about the bass but to me it's just the right amount of it. It can go low when needed (“13th step” by Perfect Circle)), has enough impact but perhaps does not give enough punch or rumble for some (again, not an issue really with my type of music); definition and control are also decent... I think it’s just very groovy somehow.

TECHNICALITIES:

Resolution and imaging is generally good but occasionally on very busy, dynamic passages it gets a bit congested and looses the clarity.

Soundstage is spacious and holographic with accurate instrument placement, contributing to an immersive experience. Guiro at the start of "Do it again" (DSD) by Steely Dan sounds amazingly clear (best reproduction I’ve heard so far in any IEM, it gave me the WOW moment), and you can hear how it’s placed in the back of the mix.

SOME MUSICAL HIGHLIGHTS:

The resonance from Steve Gadd's drums at the very start of "50 ways to leave your lover" by Paul Simon is just heavenly; Opening of “Hollywood Gone” by Supertramp has superb, immersive ambient; Electric guitars are the most fun to listen to (Black Sabbath, Led Zeppelin, Santana) ... they all sound full, rich and tasty, having an amazing tonality.

Ear tips provided are decent enough but I usually restore to my favorite salnotes tips. I did some tip rolling however and found that Craft Ears clear tips (they don’t seem to sell them on their website unfortunately) added more solid bass foundation and balanced the overall presentation. I listened to the entire Toto’s IV album (in DSD) in this configuration enjoining it immensely.

I had a chance to try Frost with Chord Mojo DAC (thanks to Father Tiresias) as well for a couple of days, and the results were fantastic:

• Better clarity
• Better instrument separation and more details
• Punchier and deeper bass
• More air in the treble
• Midrange with more weight and better timbre and tone
• Wider, more holographic soundstage
• Fuller sound.

Fun fact: if Frost wasn’t included as an extra in the Craft Ears Omnium box, I would never got to hear it as I decided to skip all the cheaper IEMs on tour at that point Now I’m thinking I’ll be skipping all the expensive ones and can’t wait to get my hands on Frost

***************************************************************
BQEYZ BQ-10

Similar sound signature to Frost, but...

• Bass is less defined and rather boomy
• Mids don't have great resolution, they appear a bit muddy
• Treble rolls off too soon and lacks the air and sparkle

Cable is of similar built and quality.

Nice, warm and pleasant all rounder for somebody on the budget, can't fault it at this price range.

The boring stuff:​

MSRP: $179 (Taken from BQEYZ Website as of time of writing)
Impedance: 32Ω
Sensitivity: 113dB/mW
Response Range: 5-40,000Hz
Driver configuration: 10mm Dynamic Driver + Micro Planar Transducer

Disclaimer:​

I’m more of a Tech head than audiophile and I use YouTube Music for 99% of my listening. Take everything I say with this in mind and please don’t come after me for not having refined taste. This is purely from my silly little point of view. I was also loaned this pair for free to test and play with but all opinions are of my own with no guidance given whatsoever.

Gear Used:​

Streaming Platform: Youtube Music Premium (Bitrate: 256kbps AAC & OPUS)
DAC: Hiby FC6, Letshouer DT03

Box:​

Packaging:​

The overall footprint is compact with no unnecessary packaging material which is always nice to see. It doesn’t feel cheap either without having to resort to random fluff in the box to keep your attention. Yes, it’s simple and yes, it’s probably not amazing for most people but It has all the bare essentials and it’s clean and presented to you in a pleasing manner so I don’t think there’s anything else you can really fault there.

Included case:​

The case being slightly more rectangular than the regular had shell squares most IEMs come with is actually a pleasant surprise. I never felt like I had to over coil the wire just to get it to fit properly in the case and there’s more than enough space on the upper mesh for a dongle or two but in my case I was able to fit the Hiby FC6 which has a pretty small footprint to begin with.

Eartips:​

The Frost also came with 2 kinds of ear tips with 3 sizes each. It’s the usual affair of “Open” and “Vocal” kind of silicone ear tips. If you have no preferred ear tips that you usually go to then these should at least get you by finding whichever you’re most comfortable with in terms of sound and fitment.

Build:​

The Cable:​

The cable included is honestly one of the best parts about the whole thing for me. It’s such a pretty collar with this cobalt blue that’s almost Lapiz in shade but not quite. It pairs so well with the IEMs themselves that it honestly feels like a waste if you replace it even if the new pair was more expensive. In terms of material choice it’s no slouch either. It has a nice looseness to it that has the right amount of rigidity to maintain its shape even after being coiled. There’s also no cable noise of any kind when rubbing up against my shirt or when moving around. The cable is also thin enough that it doesn’t really need to taper down to a smaller size when it reaches the ear hook parts. I’ve never had any issues with my glasses with the included cable and firmly secure the pair whenever I’ve got them on.

Shell:​

BQEYZ continues to astound me with their designs. They gracefully balance on the line of sophisticated and self-expression with the eye-catching but not overly loud silver pattern across the shell. With the matte finished aluminum inner side, it doesn’t get greasy from long listening sessions or doesn’t attract any unwanted fingerprints either. The overall build of it feels solid with no uneven gaps in the seams or no concerning connection points whatsoever. Yes, at this price point you should probably be expecting that already but it’s still worth mentioning considering how some do miss the mark on this.

This is more of a subjective thing but I also found them sitting quite nicely on my ear even with the relatively flat shape on the inside. Probably due to the slimmer overall profile of the shell making them easier to secure on the inside of my ear which is usually more for ergonomic shapes. They also don’t feel overtly hefty while still having a premium feel. Obviously they are never going to be as light as pure plastic shells but in the realm of aluminum builds these are definitely on the lighter side of things.

Sound:​

What immediately stands out to me sound wise with the Frost is its sound stage. It’s got a nice open sound that places things just the right distance. Orchestral hits sound especially nice and filling without being too mixed in together and losing too much detail. The melancholy in the echoes of Come Over - Noah kahan just speaks so much especially when you add in the subtle backing vocals and secondary guitars in the back. On the flip-side however it’s lacking a touch of lower end for me. While there is bass, it lacks just a lick of sub bass for me. Kick drums have a thump but don’t have that granularity and texture that I've come to expect from pairs with a more supple bass response.

Nitpicks:​

The pattern is encased in a supposedly crystal glass which does give it a nice quality to it but knowing that material choice, I couldn’t help but be a little extra cautious with the pair. Glass is glass and glass breaks. If the gorilla glass on my phone shatters from dropping it off a table in a certain way then I’m sure that these are no different. While I’m not particularly rugged with my IEMs(especially ones that are just loaned to me), unfortunate stuff still happens and I can’t help but feel a shudder of fear whenever I hear the glass clink on a hard surface.

Final Thoughts:​

While the BQEYZ Frost isn’t cheap by any means I still feel like they don’t disappoint in the value department. Sure you could probably get something similar in sound at a lower price point but the look and feel matter too and these definitely deliver in that department. Admittedly the lower end did disappoint me at first but once I got over that the sound stage just let me experience my music in a completely different way that made me realize that maybe it isn’t too bad to stay on the brighter side of things every once in a while.

But remember the best audio gear is the one that makes you enjoy your music the most, regardless of what a stranger on the internet says.

Thanks for reading!

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

BQEYZ FROST

Pretty Shell! Nice Sound?

Pros :
- Well-balanced tuning.
- Mid-bass biased bassline.
- Lush and rich vocals.
- Anti-shout.
- Sufficient top-end reach.
- Good atmospheric ambience.
- Beautiful metal construction.
- Suitable for long listening sessions.

Cons:
- Falls short in micro dynamics.
- Sub-bass roll-off.
- Potential mid-bass bloat.
- A hint of micro-grain on vocal transient.
- Average technicalities.

[MY PERSONAL HEAD-FI GRADING]
1 ★ - Appalling! please avoid this!
2 ★★ Subpar offering, there are better options out there!
3 ★★★ Decent with some caveats! Not a bad pick!
4 ★★★★ Not perfect but solid choice ! This should be in your shortlist. A nice addition to your collection.
5 ★★★★★ One the best in class! You should go right ahead & buy one! A must have!


BQEYZ FROST 3½★★★★

-SOUND IMPRESSIONS-

▓▒░ SOUND-SIGNATURE ░▒▓
The Frost provides a slightly warm, neutral tuning that delivers a laid-back and smooth sound. The emphasis on the mid-bass subtly boosts the low-end presence, while the top end offers sufficient extension for a more balanced presentation. The mid-range and vocals are far from recessed. The colouration from both ends gives the vocals a smooth yet natural quality in their delivery.

▓▒░ BASS/LOW-ENDSOUND ░▒▓
- The bassline is tuned intentionally with a mid-bass-biased in mind.

- On sub-bass heavy tracks, the sub-bass roll-off is noticeable but not severely lacking. While rumble, drone, and hum sensation are present, they may not deliver the strong, sustained vibration or impactful boom one might expect.

- Having a greater mid-bass presence concentrated in the lows, the sound is fuller, thicker, and somewhat slower compared to the sub-bass. However, in terms of attack, it’s not the most expansive, lacking some depth on transient. Regardless, it still delivers a decent kick and punch to keep listeners engaged. The drum strikes have ample slam, and the bass guitar focused more on fundamental presence. Thankfully kick-drums and tombs offer a more satisfying thud. Bass drop is kept clean and smooth while ghetto bass replay has decent bounciness and dispersion to them. Bass distortion elements however could use with better definition.

- The mid-bass spill, coupled with its somewhat sluggish nature, can sometimes cause a bloated sensation on faster bass tracks, making it less ideal for j-pop and ACG music.

- Overall, the bass performance is just average. While the dynamics and layering could be improved, it’s perfectly suitable for a more laid-back, relaxed listening experience.

▓▒░ MID-RANGE /VOCAL ░▒▓
- The vocals are more forward, though not overly intimate.

- The added warmth from the lows contributes to a richer, fuller reproduction of both vocals and instruments. Male and female vocals are equally well-performed, without one overpowering the other in duets. While vocal and instrument separation is seamless, it’s not quite at the highest level.

- However, it’s not without its flaws. There’s a slight lack of vocal transparency. While the vocal fundamentals are clearly laid out, subtle details in vocal phrasing, such as breath sounds and vocal fry, are less prominent. The smoother approach tends to downplay these nuances in vocal texture.

- Additionally, there’s a faint trace of micro-grain in the vocal transients, which is less than ideal.

- Another minor drawback is the lack of emotional depth in the vocal expression. The natural rise and fall in vocal intonation feels somewhat suppressed, and subtle overtones or reverb at the trailing end of the voice are absent. These same traits carry over to instruments like guitar, piano, violin, strings, and flute, causing each note to lose a bit of its expressive character.

- On the plus side, vocals are always smooth and controlled, especially when handling high-pitched, shouty, or screechy voices. Despite these minor issues, the vocals and instruments never come across to sound unnatural, which is a positive sign.


▓▒░ TREBLE/HIGHS ░▒▓
- The treble takes a more neutral, balanced approach, avoiding extremes of being too dark or too bright. It extends reasonably well, reaching into the mid-treble region, with air extension that’s adequate but not overly expansive. While it doesn't offer the openness and airiness often found in a brighter set, it provides just enough treble brilliance to cut through it's bassline and allow vocals and higher harmonic instruments to stand out.

- There are no unwanted resonances, such as harsh peaks or glare, and sibilance is well-controlled.

- Cymbals and hi-hats have a more backseat presence on stage. Though, have natural decay, the sizzling-end of note is less distinct. While, glockenspiel instrument have a nice bell-like dings to them.

- Electronic sounds like zings, rings, and e-guitar notes are clear, but they lack the sharpness that would make them more distinct.

- Overall, the treble lacks a bit of bite, reducing its overall definition, and there’s a consistent layer of haziness in the treble that slightly dulls its clarity.

- The upside is that it’s well-suited for treble-sensitive listeners and long listening sessions, focusing on subtle presence and ease of listening. It strikes a good balance between smoothness and crispness.

- In other words, it’s not designed for treble-heads seeking intense sparkle but rather caters to the majority of audiophiles who prefer a more balanced approach.

✧ ════ •TECHNICAL PERFORMANCE/ASPECT• ════ ✧

- The STAGE-DIMENSION is rather solid. It sounds wide and spacious with acceptable perceived depth to the stage.

- IMAGING performance is on par with most of its rival. It’s very good capturing the dynamic ambience of the recorded revenue. As for instrument and vocals, they're placed accurately between two channels but doesn't give off that pin-point sharp image definition.

- For a hybrid setup of 2 drivers, the SEPARATION level is mostly average. The separated elements don’t have the clearest of cut where each of them have a clear distinct spot in the mix. However, it managed to maintain each border of sound more consistently than not, preventing from busy tracks to sound overly congest or compress.

- When it comes to DETAIL HANDLING, it is not class leading but it is not terrible either. It is acceptable for the price even by today's standard.

- DYNAMICALLY it doesn't have alot to offer. As mentioned, having a safer tuning can sometimes sacrifice the musicality of one's music. It is not a set you sing and dance along with. The vocals just don’t sound as soulful meanwhile instrument replay lacks expressions. And eventually, one will get bored of it.

- Regarding its TONE and TIMBRE, despite, it's compressed micro-dynamics, it still sounds fairly natural thanks to its well balance tonal temperature.

- When it comes to VOLUME SCALING. It performs quite well from low to mid volume. In fact, it is best at mid-volume listening. Any higher, the mid-bass will start to lose control while the uneven response of the treble will start to show up. Listening it too low will dampened its dynamics to a flatter degree.

- The DRIVER is not the most capable I've heard. On certain occasion it started to show its limit. Driver coherency is good but not excellent. On a demanding track, the bass can sound slower while the mid-range and treble have faster decay and lighter on note-weight. Thankfully, there is no driver-flex or pressure built up issue through out the test.

◤FINAL THOUGHTS◢
My final assessment with the BQEYZ FROST had left me with a mixed feeling. There are parts of it that is good but there are also parts of it that is turning me off. It is not a set that will impresses you on 1st minute and it is not a set you would want to keep listening either. With a 179$ price-tag, it is not easy to recommend when considering its overall sound quality. Preference aside, the Frost then is still a decent product if you’re looking for a laid-back, warmish, neutral signature but only if you can get it on a discount.

========================================================================
【SOURCE & GEARS】
● Native FLAC Files [44.1Khz 16bits-96Khz 24bits]
● Foobar2000 [ROG Strix G814JVR (2024)] [USB C Thunderbolt]
● Samsung S24 Ultra [as my DAP phone][ App- Foobar2000]
● Tanchjim SPACE/LUNA Asano Tanch/ xDuoo Link2BAL.
● INNTAK HIFI OTG Type C to Type C
● Eartips : Spinfit CP100 (M)
● Stock Cable 3.5MM Single Ended.
========================================================================

【PLAYLIST／TEST-TRACKS】​

1977 Fleetwood Mac - Dreams ★
1982 Chicago – Hard to say I'm sorry. ★
2003 NARUTO Original Soundtrack I – Wakiagaru Toushi ★
2008 K.will (케이윌) – 소원 (Great King Sejong OST Part.1)
2009 Maksim – Exodus
2010 Ichiban Ushiro no Daimaou (OST) – Kokoro no Oku De Ha
2012 Imagine Dragons – Night Visions - Demons ★
2014 Grabbitz – Here with you now. ★
2014 BoA – MASAYUME CHASING
2014 Hyolyn – 안녕 Good bye ★
2015 KOKIA – I Found You ★
2015 K MISSING KINGS (OST) - New Kings
2016 K RETURN OF KINGS (OST) - Return of Kings
2016 K RETURN OF KINGS (OST) - If you die.
2017 Berry Goodman – Zutto (ずっと) ★
2017 SawanoHiroyuki[nZk]:mizuki – ViEW
2017 Namie Amuro – Hope
2019 K SEVEN STORIES (OST) - In Pursuit Of
2019 K SEVEN STORIES (OST) - Lost Small World
2019 Blade & Soul (OST) – Half-Moon Lake
2019 CAROLE & TUESDAY VOCAL COLLECTION Vol.1 – Light a Fire ★
2020 Paradox Live Opening Show (1st E.P) – BAE – BaNG!!! ★
2020 Paradox Live Opening Show (1st E.P) – cozmez – Where They At ★
2020 倖田來未 (Kumi Koda) – GET NAKED (Kiyoshi Sugo Remix)
2020 倖田來未 (Kumi Koda) – again (MATZ Remix)
2020 premiere fleurs – プリンシパル
2020 Love Live! Nijigasaki – 朝香果林 (Karin Asaka) – VIVID WORLD ★
2020 Fujii Kaze – へでもねーよ”／Hedemo Ne-YoSeishun Sick
2020 King Gnu – 三文小説 ／Sanmon Shosetsu ★
2021 OWV – Fifth Season ★
2021 加藤 ミリヤ (Miliyah) feat. Yoshida Brothers – この夢が醒めるまで ★
2021 Aoi Teshima – ただいま★
2021 Official髭男dism – Cry Baby
2021 Chanmin BIJIN 美人 – Morning Mood
2021 門脇更紗 (Sarasa Kadowaki) – きれいだ
2021 Mirei Touyama – 美忘録
2021 SELECTION PROJECT Vol.1 – Only one yell -天沢灯ソロver.- ★
2022 Belle (Original Motion Picture Soundtrack) – Million Miles Away (ENG vers.)
2022 rei (E-girls) – Dark Hero.
2022 rei (E-girls) – IDNY
2022 I can fly (Special Edition) – Bleecker Chrome - You will shine ★
2022 I can fly (Special Edition) – YOSHIKI EZAKI x Bleecker Chrome - UP ★
2022 BEAST TAMER (OST) – じんわり感じている幸せ
2022 Ado – 会いたくて
2022 Ado – 踊
2023 La prière – Sweet Dreams ★
2023 Bungou Stray Dogs 4th Season ED – Luck Life – しるし★
2023 UMAMUSUME PRETTY DERBY - Hat on your Head!
2023 Anna – 花のように (Hana no You ni)
2023 riria. – 貴方の側に (Anata no Soba ni)
2024 Dungeon Meshi OP – BUMP OF CHICKEN – Sleep Walking Orchestra
2024 Ernie Zakri, Ade Govinda - Masing Masing ★
2024 Paradox Live THE ANIMATION OST – 25 幻影武雷管 - Trauma ★
2024 Bartender Kami no Glass OP – Takaya Kawasaki – Stardust Memory ★
2024 Maou no Ore ga Dorei Elf ED – Sayaka Yamamoto – Blue Star
2024 Spice and Wolf Merchant Meets the Wise Wolf OP – Hana Hope – Tabi no Yukue/ Destination of the journey
2024 Tonari no Youkai-san ED – Aoi Kubo – Iro no Naka (風媒花)
2024 Sayounara Ryuusei, Konnichiwa Jinsei OP – LUN8 – Together Forever
2024 Sayounara Ryuusei, Konnichiwa Jinsei ED – EverdreaM – 君と見た景色
2024 Natsume Yuujinchou Shichi ED – Toshiki Kondo – こまりわらい (Komariwarai)
2024 Hololive FLOW GLOW – FG ROADSTER ★
2025 Ameku Takao no Suiri Karte ED – The Gospellers – will be fine feat. Anly ★
2025 A-Rank Party wo Ridatsu shita Ore wa OP – L.E.I. – Enter ★
2025 Arifureta Shokugyou de Sekai Saikyou S3 ED2 – iScream – Metamorphosis
2025 Watashi no Shiawase na Kekkon S2 OP – Riria. – Shiawase na Yakusoku. ★

★ Main-Test-Tracks/ A glimpse of what listen to 90% of the of time.


Do take my words for what it’s worth. Afterall, I am just one man. ╮(╯▽╰)╭

THANK YOU SO MUCH FOR READING! HAVE A GOOD DAY WHEREVER YOU ARE! TAKE CARE!

Disclaimer:
- This unit is sent to me by my friend Edmund (Facebook AudioMaster)(Malaysia). Thank you so much for making this review possible.
If you like me to review your gears, please do send me a message! I'll try to respond ASAP!


EXTRA PHOTOS

with

The BQEYZ Frost has been a surprising discovery for me. From the moment I put them in my ears, I felt an immediate connection with their sound neutral yet musical, rich with warmth, and incredibly engaging. As someone who appreciates a smooth yet detailed presentation, I found the Frost to be one of the most enjoyable IEMs I’ve tried in the 1DD + 1 Micro Planar configuration.

With a strong mid-centric balance, a deep and controlled low-end, and an extra layer of macro-dynamics from the planar driver, these IEMs deliver a sound that feels effortless yet captivating. Whether I’m listening to vocals, acoustic instruments, or even gaming, the Frost keeps me engaged without any harshness or fatigue. Let’s dive deeper into my experience.

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Disclaimer:​

I received the BQEYZ Frost from BQEYZ for review purposes, through my team Sonic Mantra . All opinions expressed in this review are my own, and BQEYZ has no influence over my evaluation. This review is unbiased and reflects my honest experience with the product. I am not affiliated with BQEYZ in any way, and I have not received any compensation beyond the product itself.

Note: I am into warm, analog sound that can produce rich and cozy tones, with enhanced bass and midrange frequencies to smoothly render it full-bodied. This captures the organic warmth of music with depth and intimacy, much like the soft texture of vinyl. Natural-sounding, relaxed, and emotionally engaging, this is perfect for immersive soothing listening. Based on my sound preference, I am writing this review.

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Gears Used​

• Dac Dongle: ddHifi tc44c, tc44pro e2, Fosi audio Ds1,
• Phone: LG V60.
• Desktop Dac & Amp: Xduoo XD05 Basic with (BB OPA2132p, BB OPA2604, BB OPA1622, JRC Muses8820 ) op amps, Kaei tap 2, Zen dac V2, Earman ST-Amp.
• DAP: Tempotec V3, Ibasso DX180.

Technical Specification​

• Item： Frost
• Driver Unit: Dynamic Driver + Micro Planar Transducers
• Dynamic Driver: 10mm
• Impedance: 32 Ω
• Sensitivity: 113 dB
• Frequency: 5-40KHz
• Cable Length: 1.2m
• Pin Type: 0.78mm-2 Pin
• Plug Type: 3.5mm or 4.4mm
• Diaphragm: PU and PEEK Composite Diaphragm
• Cable Specification: Silver-plated Coaxial Mixed Cable

Box Content​

• Earphone*1 Set.
• Cable * 1pc.
• Carrying Case* 1pc.
• Brush *1pc.
• Silicone Ear Tips(S/M/L) *6 Pairs.
• Memory Foam S*1.
• Ear Tips Holder*1.

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Build and Accessories​

Right out of the box, the Frost made a great first impression. The build quality is excellent solid aluminum shells combined with a stunning glass faceplate that features a mesmerizing blue snowflake-like design. It’s one of the most beautiful IEMs I’ve seen, and it feels just as premium in hand as it looks.

The included accessories are just as thoughtful. The standout is the copper cable in a deep blue color that perfectly matches the IEMs. Not only does it look gorgeous, but it also feels high-quality, flexible, and free of microphonics. The package also includes multiple ear tips and a storage case, making for a well-rounded unboxing experience.

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Sound Performance​

The Frost leans toward a neutral, slightly warm signature with a rich and euphonic midrange. There’s a natural flow to its sound smooth, engaging, and effortlessly detailed. The presentation is full-bodied without being overbearing, making it easy to listen to for long hours.

Bass – Deep, Punchy, and Well-Controlled​

The bass on the Frost is impressive deep, punchy, and controlled, but never overwhelming. It provides a solid foundation for the music, with good layering and a satisfying rumble. The sub-bass reaches deep, but it never intrudes into the midrange. While not a bass-head IEM, the low-end has enough weight and definition to keep things engaging.

Midrange – The Heart of the Frost​

This is where the Frost truly shines. The midrange is natural, rich, and beautifully balanced, making vocals and acoustic instruments sound incredibly lifelike.

• Male Vocals
  Male voices sound full-bodied, smooth, and organic. Listening to Mark Knopfler’s – Darling Pretty and Chris Isaak’s – Wicked Game, I was immediately drawn into the intimate and textured delivery. There’s a depth to the vocals that makes them sound effortlessly real, with no unnatural thinness or excessive warmth.
• Female Vocals
  Female vocals have an excellent mix of clarity, energy, and smoothness. Beth Hart’s – Love Is A Lie and Shania Twain’s – Man! I Feel Like A Woman! highlight the Frost’s ability to present female voices with richness and liveliness. There’s just the right amount of forwardness without any harshness, making it a joy to listen to.
• Instruments
  When it comes to acoustic instruments, the Frost is a specialist. Kitaro’s – South Wind and Caravansary showcase its ability to reproduce flutes, harps, and strings with breathtaking realism. The micro-planar driver adds an extra layer of macro-dynamics that brings instruments to life with an engaging presence. I also tested Pink Floyd’s – Pulse (Live) album, and the guitars, drums, and synths felt lively, with great separation and detail retrieval.

Treble – Smooth and Refined​

The treble is buttery smooth, avoiding any sharpness or peakiness. There’s just enough sparkle and air to keep things open and lively without causing fatigue. The planar driver adds extra resolution without making the treble sound artificial or exaggerated. It’s the smoothest BQEYZ I’ve heard so far, and I really appreciate how fatigue-free it is for long listening sessions.

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Soundstage & Imaging​

The soundstage on the Frost is wide and open, creating a spacious and immersive feel. The depth is also quite good, giving a three-dimensional effect to the sound. It never feels closed in or congested, making it an excellent choice for live recordings and orchestral tracks.

Imaging is another strong point—the placement of instruments and vocals is precise, allowing me to easily pick out different elements within a mix. This quality is especially noticeable in complex tracks, where the Frost maintains clarity and separation effortlessly.

Instrument Separation​

Instrument separation is fantastic. Every instrument has its own defined space, and even in layered compositions, nothing feels smeared or congested. The Frost handles busy tracks with ease, making it easy to appreciate the nuances in recordings.

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Gaming Performance​

I wasn’t expecting the Frost to be such a great gaming IEM, but I was pleasantly surprised. The wide soundstage and precise imaging make it an excellent choice for FPS games and open-world titles.

• FPS (CS2, Valorant, Call of Duty Multiplayer) – The footstep positioning is on point, allowing me to hear enemy movements with pinpoint accuracy. The balanced tuning ensures that gunfire, explosions, and environmental sounds are clear but never overpowering.
• Open-World Games (RDR2, GTA V, Once Human) – The atmosphere in these games is breathtaking with the Frost. The detailed midrange and spacious soundstage make environments feel alive whether it’s the rustling trees in RDR2 or the bustling streets of GTA V.

For gamers looking for an IEM that delivers both immersion and competitive precision, the Frost is a fantastic option.

Final Thoughts – A Frosty Delight​

The BQEYZ Frost has quickly become one of my favorite hybrid IEMs. It delivers a smooth yet engaging sound, a stunning design, and a versatile performance that works across both music and gaming.

For those who love vocals, acoustic instruments, and an immersive yet non-fatiguing sound, the Frost is an absolute winner. It brings out the beauty in music with its lush midrange and natural tonality while maintaining technical prowess. And as a bonus, it performs exceptionally well for gaming, making it an all-rounder for multiple listening scenarios.

BQEYZ has truly outdone themselves with the Frost, and I can confidently say it’s the best 1DD + 1 Micro Planar IEM I’ve tried so far.

Would I recommend it? Absolutely.


Happy Listening

You Can Read Other Reviews here.

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THE INTRO

This hobby is an escapist's dream. Escape from daily routine and distress that's causing you via something as sincere and everlasting as listening to music. I believe that the power of music is still not fully understood since it works in mysterious ways. Allow it to do its magic on you and let your worries dissolve in melody.

Having had the possibility to try so many different sets in a relatively short time I felt obliged to go ahead and express my gratitude by trying to help some lost souls out there, just as I was when I first stumbled upon this weird hobby about wired earphones – so yesteryear! … I thought. Possibilities are seemingly endless and only by getting to meet the right people did I manage to jump onboard the train heading the 'right' direction without getting off-track thousands of times along the way. Make sure to understand the helping person's preferences and you too can find your footing and hit the ground running in no time.


This is how I imagined setting up the following review: I will attach three adjectives to each of the usual topics – the bass, the midrange, the treble, and the technicalities – and elaborate why I deem those describe the segment best. I will then continue with my graphics and quick comparisons, check for the effect of source-rolling and IEM's scalability, and finish with a quick summary including who this set is (not) for.

I hope you find my newly revised approach an enjoyable and worthwhile read!

I am all about transparency, so to kick it off, this IEM was sent to me at a discount by BQEYZ Official AliExpress site in exchange for my review. They have no influence on what I write. And as always, I am grateful for the opportunity. All impressions were written using the stock cable and Coreir AL-core eartips.


THE MUSIC

To better understand what I listen to and thus perhaps have a clearer view as to what I look for, hiding behind the Spoiler is my list of 80+ tracks (in alphabetical order) I skip through for reviewing purposes. This is of course only a snippet of my expansive playlists, but it should give you a rough idea. I am sure everyone can find something they are familiar with. I also warmly recommend trying any of these for yourselves on whatever setup you guys have!




THE SOUND CHARACTER

Bass – featherweight, agile, sometimes lacking

Discussions about bass quantity will forever stay among those most subjective ones in the hobby. The factors that influence each and everyone's perspective as well as each and everyone's preferences are countless. All that's left to us as reviewers is to try and put it into perspective by comparing to sets most seem to agree have a close-to-neutral level of bass output and, of course, secondly, and more crucially, try to explain set's bass quality which is hardly related to its quantity. To avoid blabbering, Frost will be frowned upon by bassheads or those whose music libraries consist of nothing but bass-heavy songs. On my bassiest and most powerful source, the Venture Electronics Stack, it is not blowing my mind by subbass rumble or midbass punch, but it gains a healthy amount of oomph and feels perfectly balanced for tech house and similar, such as After Love by Anyma. It stays in that neutral territory which is fine by me, especially since it never litters the midrange, allows low mids to breathe and remains controlled no matter the circumstance – this is what I like to call agile or athletic or eager bass, one of those multifaceted and multitalented ones that figure out a way in seemingly every situation. Even on sources that add most meat to the bones, this is hardly a thick and succulent T-bone, so not recommended for those that can only get full by eating a pound of meat. To try and simplify, whoever primarily focuses on bass should look elsewhere, but the quality is good, though a bit textureless.


Midrange – on the thinner side, sweet vocals, not as captivating

As my time in this hobby progresses I am starting to understand my preferences and pet peeves more and more. Midrange is where I am most likely to either adore or dislike the set. And it's not a particular sort of midrange that I am after – meaning I do not necessarily enjoy just a thinner, drier, more clinical midrange or vice versa. It is a combination of factors and how they align with the bass and treble to tell a story – this is what it's all about. Am I drawn in and willing to listen to the story? While the Frost avoids all my personal pet peeves such as thick low midrange, shouty high midrange, unforgiving pinna gain, veiled vocals or instruments, digital timbre, poor separation, … it does not set my heart on fire and fully captivate me. It is a thin and well-placed midrange which I like, but that tiny bit of layering and detail retrieval that forms a 3D image that seems to float somewhere in thin air is lacking. Not a deal breaker by any means, just something that could be done better. Still, it is a midrange that allows many genres to play wonderfully and as such it gets rated well in my books.


Treble – slight spice, balanced, detailed

Adding just the right amount of spice is a thing of masterful tuning and that little bit of je ne sais quoi. Even then, it is near about impossible to cater to everyone. This set does tremendously well on high-powered and a tad warm leaning sources to my ears when it gains that extra bit of control across the spectrum. Sibilance is never an issue, neither is any unwanted honkiness due to overtones. Low treble can go from lively to maintained and smooth by source-rolling. To stay true to IEM's performance on as uncoloured sources as I possess, the iBasso DX180 makes the treble stand out in comparison to bass. Since the treble is free of unwieldy peaks tilting the overall tonality towards treble is not a negative, but rather a plus, adding that bit more energy and openness to female vocals first and foremost. Brass remain controlled and timbrally correct while just a tad weightless in certain scenarios, like Vidda by Ole Edvard Antonsen. While it never feels boxed in or unacceptably tailed off, the air is not among its strong suits. There is no real sense of effortless extension for days, as there is, for example, on the AFUL Performer 5+2 that packs microplanars too. Since the bass is much lesser as well, the lack of air is not missed as critically. Air is often just an excuse that allows sets to overdo the bass yet still turn out rather balanced-sounding. Overall (especially accounting for more sources), treble is mostly on the safe side with no achingly prominent peaks or troughs.


Technicalities – serious transparency, good imaging, lacking dynamics

There is this effortlessness to BQEYZ sets, at least the Cloud and now Frost seem to be this way, where the technical aspect does not seem to be too forced by pushing any particular frequency range, yet it's perfectly sufficient, admirable even. It is as much a case of good quality drivers that are tuned well as it is the fact they do not aim to push the bass to driver's extremes. It rewards with a sweetly transparent playback that offers sufficient detail retrieval to never feel too dull nor too in your face. It is precisely the combination of this leaner sort of midrange that allows for good imaging but only an okayish soundstage, most notably the depth, since this is not a mindblowingly wide sounding set. The ability to localize sounds should come in handy for gamers among you, but I am not really a gamer myself so tough to say for sure. It seems to lack some dynamics and instead prioritizes control while sacrificing that slight bit of ability to handle sudden volume swings with much authority. Nonetheless, an overall very pleasant, technically savvy set.



THE GRAPHICS

By now, most of you have come across these playful graphics of mine. I have received so much positive feedback on these that I dare not leave them out going into 2025!







THE COMPARISONS

In comparison, the AFUL Performer 7 does outperform the Frost in a couple of aspects. First is the bass, especially the added elasticity of the P7's DDs when compared to Frost's rather anemic DD, at least in direct A/B. That said, I am not too sure that I prefer P7's bass overall, since it does seem a bit soulless and textureless and while that's not Frost's strength either, I might appreciate the slightly lesser amount of bass on the Frost more. Second thing where AFUL have outdone BQEYZ is treble precision and layering. The P7's microplanars are better implemented and that makes it among the greatest treble I have heard. Frost is not on the same level and feels much more single DD-like in regards to treble. Part of which is the fact BQEYZ seem to have cut microplanar's wings and not allowed it to get much air at all. Where Frost crawls back and outdoes the P7 to where I prefer Frost's take on many of my test tracks above is the midrange placement and particularly vocal naturalness, be it male or female. Placement is not ideal on either, though. P7 has this slight fogginess over many vocals, such as Ain't No Love In The Heart Of The City by Robert Haglund. Frost physically places the vocalists too far back, so too deep into my head. Winner by the smallest of margins, AFUL Performer 7.



This is the one I was excited for. A BQEYZ family battle! Can the youngin outbox its father, the Cloud? This is an interesting one. I immediately noticed the placement of midrange being more to my liking on the Cloud, but one other thing stood out like a sore thumb. Cloud's midrange is certainly not as crystal clear and polished as Frost's. The difference is sort of like 720p vs 1080p. Bass is much smoother too and it makes the whole experience seem as a much calmer one than the Cloud is in isolation when it sounds highly balanced and resolving. I have started to appreciate what BQEYZ have done with the microplanar which, at least to my ears, sounds as if it helps low down into the midrange to wipe any stains. The microdetails are so much easier to pick up on and truly raise the bar. Where the Cloud strikes back is the soundstage that seems grander with more space to breathe. The better balance and stunningly improved technicalities make this an easy clean sweep victory for the Frost.




THE EFFECT OF SOURCES & SCALABILITY



The effect sources have on sets is often overlooked or at least not as highly regarded as it perhaps should be. While I still maintain the stance that the transducer is of main importance, sources follow right thereafter. Certain sets will be more responsive to various DAC/AMPs, while others seem to remain relatively unchanged and unaffected by source-rolling. Frost changes dramatically. I believe it has something to do with the two different driver topologies and their different impedances, but I might be awfully mistaken. The way sources change Frost's presentation and the whole character from either neutral warm to neutral bright in this chameleon-like fashion is something I have not experienced before and DD+microplanar configurations are still rather fresh to the market.

Another particular subject that is still somewhat of a mystery and a taboo, is whether IEMs scale with sources, and if so, why? We know IEMs barely use any power to play. And thus the often heard 'headroom' argument seems a bit moot. But there are certainly other aspects of Amp design that are well over my head and still somewhat unexplored or at least unexplained. The Frost remains more or less a very similar experience when it comes to dynamics or staging when I reach for the VE Stack, but it does wildly change the character, instantly becoming a bottom-end-first set.



QUICK SUMMARY

The BQEYZ Frost is a thing of beauty. It pleases the eyes and despite that being very subjective, I am nearly certain most would agree. This is a stunning looking IEM. Then we move on to the sound where the praise does not end, except for a few niggles that could be improved regarding dynamics, vocal placement, and treble extension. Those will either be a deal breaker for some or not matter at all for others. I believe that despite all that, the Frost is a breath of fresh air and delivers something unique to the otherwise oversaturated market.

Thanks for reading and stay wonderful.

Frost is the formation of thin ice from water particles that were embedded on the solid surface due to the state of freezing temperature. There are some types of frosting that you will encounter in nature like wind frost, radiation frost, rimes, window frost and black frost. The most common frost that usually happens here is the black frost as it is a seasonal occurrence that happens in December to January in the mountainous regions in the northern part of the Philippines as it ruins some vegetable crops that makes them unharvestable and unsellable that will be a major problem to the local vegetable crop farmers.

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BQEYZ AUDIO is actually one of my major favourite audio brands and I did a substantial number of reviews on their product line-up since my calling as an independent audio reviewer. And with the end of their Season model series, they introduce their latest flagship series, The Weather series which was introduced last two years ago and it already produces some models like Wind and Cloud and all of these models are both excellent in their own right.



And now, I will introduce their latest model, The BQEYZ FROST and like all of its predecessors, it has a hybrid driver configuration consisting of two driver technologies. And the usual build materials that their shell structure have are typically made of metal alloy which is standard of all major BQEYZ models with exception of SUMMER and TOPAZ.



The hybrid drivers that were implemented inside of FROST are composed of a dynamic driver and a micro-”planar” driver and each driver will handle a certain frequency range. The dynamic driver that was applied here is a 10mm in a dual-cavity structure with a composite diaphragm comprised of PU (Polyurethane) and PEEK (Polyetheretherketone) which are both thermoplastic and with combination of this compound material, it will dispense a good mechanical strength, improved chemical resistance, better thermal stability and with some biocompatibility properties to provide flexibility, firmness and dampening effect for deep and impactful bass, clear and smooth mids and detailed treble. Another driver that works in tandem with the dynamic driver is a customised micro-”planar” driver which takes a form similar to a vented balanced armature driver as it has a small rectangular slit for better diffusion and more coalescing sonic performance across the frequency spectrum, and this type of driver technology can be found on other sets like SuperMix 4 from SIMGOT, Performer 7 from AFUL and probably the first known model that implemented this one, the MADOO Type 512.



The drivers are then encased in a medium-size CNC-milled aluminium alloy shell chassis that underwent an anodising and sandblasting process for less susceptible from corrosion and at the same time, wear and tear resistance for better ductility and protection from deformation. On its shell’s two-part structure, the cavity base is entirely made of aluminium alloy as it will greatly reduce and dissipate some unwanted acoustic resonance while its faceplate has a clear laminated glass on it with some snowflake pattern on its blue-coloured background in which I find it as eye-pleasing. And BQEYZ still implemented a 0.78mm 2-pin connector on this one since their very first model line-up and this one is the most stable of all interlocking mechanisms on IEM in my opinion due to ease of doing some attached/detached on removable cables.



The earpieces offers a comfortable fitting if you pair with a suitable ear tip that conforms to your lugholes’ physiological size although its passive noise isolation is rather decent enough as it was barely able to block some unwanted external noises from the outside surroundings, probably due to its a bit stubby brass nozzle sizes they have.



Speaking of its stock cable, to think that since the first model from the Weather series, BQEYZ typically paired the IEM transducers with high quality cable in which this set has. The FROST’s cable has 2-core-structured monocrystalline silver-plated copper with a blue-coloured insulation coating in which this type of material is supposed to deliver a clear, stable and greatly minimises distortion on its audio signal output. And on its termination plug, I opted to choose the standard 3.5mm single ended one and this termination plug that underwent via gold-plating process for better conductivity, and also for corrosive and wear resistance.



Like all BQEYZ models, the FROST is also well-packed with quality accessories inside of its packaging box whose design has the picture of the product with some basic information like specification and company addresses.



These are the following contents inside of it packaging box:

• Pair of BQEYZ FROST IEM transducers
• Stock cable
• PU leather storage case
• Three (3) pairs of BQEYZ “Reference” ear tips in different standard sizes.
• Three (3) pairs of BQEYZ “Atmospheric” ear tips in different standard sizes.
• One (1) pair of memory foam ear tips.
• Cleaning tool brush
• Paperwork like Q.C. stub, warranty card and instruction manual.

As for its power amplification requirement, this set can be driven from a source that these devices like smartphones, laptop, tablets and dongle adapters which usually have normal gain output as it has fairly sensitive enough with a resistance rating of 32 ohms. But this set also scales well if you pair it to better sources with medium or high gain mode output like DAPs, headphone DAC/Amp dongles and desktop headphone amps that will sound more dynamic.



The tonality of this one has a balanced-neutral tonal profile which is a well-balanced and consistent sound that all parts of the frequency range were presented equally across its sonic spectrum.




LOW/BASS:

Despite its neutral tuning, the bass quality of this one is relatively well-matched as it has a fair sub bass presence while its mid bass have an adequate texture that complement its neutral tonal profile. In general, it produces an incisive, precise with succinct rumbly bass response with a sense of good separation and clean presentation.

There's a sufficient depth and definition on its sub bass presence as I can feel some of its rumble, reverberation and vivacity generated from these selected instruments like synthesisers, drum machines and some low tuned string ones, bass guitars, double-basses and octobasses. The mid bass section on this one has a rather balanced texture as it does not sound lean nor too thick as it has an ample note body to have enough punch and groove on some bass-clef instruments and deep male vocals. The bass guitars have a rasping and resonant sound while the double-basses have has slightly broader and more sustaining sound on every pluck and bowing of its notation strings, bass trumpets sounds a bit sonorous and the bass kick drums have that resonance, thudding and eerily sound coming from every hit on its drumhead. On bass and bass-baritone, while they have a deep and resonant tone on their voices, they sound a bit velvety as they sound less rich with less dark timbre to give that dense and dusky sound that these vocal types usually have.


MIDRANGE:

Given its neutral profile, it has a bit linear midrange presentation however it doesn't sound too lean nor hollow as it retains a well-balanced texture with an ample warmth, transparency, clarity and crystalline that makes the vocals and instruments sound more natural and almost life-like timbre on them. That ample warmth and luminous characteristic will give rich, full and vivacity on both male and female vocals which makes the midrange presentation of this one most likely caters towards some neutral-heads and at the same time, for a mid-centric listener like me.

The male vocals in which has an ample volume and depth that will be beneficial to most types of singing voices like baritones, tenors and countertenors. Baritones have those smooth, warm and plushiness on their vocals although I noticed that some subtypes under this vocal type that kavalierbariton, verdi, dramatic and noble baritones appears to be less rounder, just a moderately powerful and a bit lacking of that fullness that more mellow, milder and lighter ones like lyric and light baritones.Tenors have clear and brassy tone from their voices as leggero have that light sound, lyric tenors have full and sheen sound from their vocals in while spinto tenors have more glossy sound on it, and then both dramatic tenors and heldentenors have ringing, powerful and rich sound from them. Countertenors have that tender yet fiery sound with some sense of ethereal nature on their distinctive falsettos voices. As for female vocals, on contraltos, they have that smoky, rich and ample weight from their chesty vocals, mezzo-sopranos have that velvety yet fiery and coppery sound from their vocals. Sopranos sound crystalline, gleaming and satiny from their vocals as dramatic sopranos have full and rich tone, lyric sopranos have that expressive and euphonious sound, and coloratura sopranos have that agile, bright and airy sound from their vocals.

Regarding on instruments, on strings instruments like the guitars, cellos and violins, guitars have that balanced and crisp tone on every plucking or strumming on its note strings, cellos have a full, lustrous and lively sound from bowing and fingering notation, and violins have vibrant and sweet sound from the every gripping on its bowstrings. About the brasses, trumpets sound full while trombones have that taut, eruptive and intense sound and then horns have full and clear sound. Then on woodwind instruments, concert flutes have a light and ethereal sound, piccolos sound brilliant and graceful, clarinets sound melodic and lustrous and lastly, saxophones have a warm, sonorous and lively sound on them.

Pianos appears to have an even and balanced tone on them as it has a rich, sweet and clear sound.


HIGHS/TREBLE:

The treble quality of this one has a lustre, crisp and sufficiently airy that compliments well with the balanced-neutral sound profile of this one. There are some slight accentuations between the upper-mids up to present treble section enough to highlight some clarity, detail and definition on vocals and attack on instruments while any chances of sibilance and stridency were kept under control.

It has a sufficient amount of air and a noticeable intensity of its sparkle on its brilliance treble section. Due to the consistency of its sparkle, it will deliver a vividly sound characteristics on some treble-clef instruments as cymbals sounds glistening and lustrous while hi-hats have that shortened sizzling and buzzing sounds, glockenspiel have shimmering and bell-like sound and celestas sound silvery and sweet.


SOUNDSTAGE, IMAGING & OTHER TECHNICALITIES:

BQEYZ sets are well-known for their technical performance and FROST isn't that different among its predecessors in regards to this aspect. It projects a perceivable a fairly roomy head stage with my aural sphere as it has an above-average to wide lateral span with excellent height reach and depth although in my opinion this one is quite a bit intimate presentation compared to the previous BQEYZ models that I have tested for the past few four years.

On its stereo imaging, it conveys a concave-like presentation rather than a 3D-like holographic presentation that most BQEYZ units that usually project this facet. But still, it has a remarkable layering of tonal frequencies from vocal sections and instrumental lines as it creates a cohesive and a sense of texture and depth on its soundscape with excellent separation on its elements. The texture and depth also adds some well-defined dynamics on both macro-dynamics and micro-dynamics as the former sets a solid presentation on bringing out the varying degree of volume and loudness on both choral and instrumental lines while the latter have a sharper micro-detail on retrieving some good amount of nuances, grains and subtleties from an audio tracks like notational attacks of instruments, vocal ends and reverb tails.

Its hybrid driver configuration has a remarkable cohesive performance as the dynamic driver delivers a responsive transient response for an agile bass hit while its micro-”planar” transducer is able to give that quick, accurate and consistent vibration without any distortion at all.


PEER COMPARISONS:

AFUL PERFORMER 7/ 5+2

• More pricey as it was currently priced at around US$240/£194.
• Aside from an additional dynamic driver and micro-”planar” transducer, it has an additional custom balanced armature driver that makes this set more of a tri-brid set-up.
• Its shells have a UIEM-type form factor made of medical-grade resin that offers one of the best fitting and comfortable wear in the IEM market.
• It is also well-equipped with good quality inclusions inside of its packaging box from premium cable to more choices of ear tips.
• It has a mild U-shaped sound profile as it has a balanced bass response as it sounds rumbly and punchy, a bit recessed but a well-balanced and transparent midrange, and then a smooth and airy treble response.
• It has very similar technical performance with the FROST but there is a difference in regards of stereo imaging as the PERFORMER 7 has more atmospheric and a 3D-like presentation on its sonic canvas.

SIMGOT SUPERMIX 4

• This one a bit cheaper compared to the FROST.
• Aside from the dynamic driver and micro-”planar” transducer, it is also a piezoelectric driver and a balanced armature driver that makes the set a quad-brid configuration.
• It has a composite resin shell chassis made of resin and aluminium alloy to accommodate the drivers inside.
• It is somehow fairly accessorised but it only includes a single type of ear tips which are all balanced bore silicon ones and just an average quality stock cable.
• The sound profile of this one a modified harman-esque type which is a U-shaped with a balanced-warmish tonality as it has more sub bass-focus bass response, a more recessed but it has an ample warmth and smooth midrange presentation, and a tad energetic but still glossy treble quality.
• This one also possessed a very similar technical performance with the FROST but the difference is that this set projects a more holographic presentation on its stereo imaging.

In conclusion, this is another stamp of approval of product excellence to BQEYZ as they continue on delivering a high quality product and continuing to pursue a tonal refinement on every product release, and the product is the testament of their meticulous workmanship. The FROST is the continued evolution of BQEYZ’s flagship product offering as it continues its hybrid driver configuration with a new driver technology as it offers a solid build with an attractive looking shell panel, a well-thought ergonomics design, quality accessories and neutral tuning profile with competent technical performance. I will definitely give this one a high mark and will recommend it to all audio enthusiasts looking for balanced-neutral sound IEMs.

The BQEYZ FROST is now available both on LAZADA for the Southeast Asian market and HIFIGO, I provide the following non-affiliated links below.

BQEYZ OFFICIAL STORE (LAZADA):
https://www.lazada.com.ph/shop/bqeyz-audio

BQEYZ OFFICIAL STORE:
https://bqeyz.net/products/bqeyz-bq10-dynamic-driver-in-ear-earphones-hifi-wired-iem-gaming-earbuds

HIFIGO:
https://hifigo.com/products/bqeyz-weather-series-frost


Here are my other reviews of BQEYZ products.

■ BQEYZ KC2

■ BQEYZ SPRING 2

■ BQEYZ SUMMER

■ BQEYZ AUTUMN

■ BQEYZ WINTER

■ BQEYZ TOPAZ

■ BQEYZ WIND

■ BQEYZ CLOUD

■ BQEYZ BQ-10

SPECIFICATION:

MODEL: BQEYZ FROST
IMPEDANCE: 32Ω
SENSITIVITY: 113dB
FREQUENCY RESPONSE: 5Hz – 40KHz
CABLE LENGTH: 1.2M
PIN TYPE: 2-PIN CONNECTOR (0.78MM)
PLUG TYPE: 3.5mm, 4.4mm
DRIVER UNIT(S): (1) DYNAMIC DRIVER + (1) MICRO-PLANAR DRIVER


TRACKS TESTED: ( * = 16-bit FLAC, ** = 24-bit FLAC, *'* = MQA, '*' = DSD, *'= .WAV)

Alison Krauss -When You Say Nothing At All *
Jade Wiedlin - Blue Kiss**
Led Zeppelin - When The Levee Breaks **
Mountain - Mississippi Queen *
Queen - Killer Queen **
Guns N' Roses - Patience *'*
Eric Clapton - Tears in Heaven '*'
Sergio Mendes- Never Gonna Let You Go '*'
Pearl Jam - Daughter **
Roselia - Hidamari Rhodonite *
Assassin - Fight (To Stop The Tyranny)*
Celtic Frost- Visual Aggression *
New Order - Blue Monday *
The Corrs- What Can I do (unplugged version) *
Jimi Hendrix Experience - Voodoo Child *
The Madness- Buggy Trousers *
Metallica - Motorbreath **
Mariah Carey- Always Be My Baby *
Destiny's Child - Say My Name *
Malice Mizer- Au Revoir *
Mozart - Lacrimosa *
New York Philharmonic Orchestra - Dvorak- Symphony 9 " From the New World." *
Eva Cassidy - Fields of Gold (Sting cover)*
Michael Jackson - Give In To Me *
Exciter - Violence and Force *
Diana Krall - Stop This World **
Debbie Gibson - Foolish Beat *'*
The Sisters of Mercy – Lucretia My Reflection**
Suzanne Vega – Luka **
Lauren Christy – Steep *
Ottoman Mehter - Hucum Marsi *
Diana Damrau - Mozart: Die Zauberflöte*
Type O Negative - Black No.1 *
Felix Ayo - Vivaldi: Presto **
Three Tenors - Nessum Dorma *
Mercyful Fate - Witches' Dance *

P.S.

I am not affiliated to BQEYZ nor receive monetary incentives and financial gains as they provide me a review unit for an exchange of factual and sincere feedback from yours truly.

Once again, I would like to send my gratitude to ELLE ZHOU of BQEYZ for providing this review unit as a loaner unit. I truly appreciate her generosity and trust towards me and other reviewers.

TONAL BALANCE COHESION: 8.5/10
OVERALL TECHNICAL PERFORMANCE: 7.8/10
IMAGING: 7/10
SOUNDSTAGE: 8.5/10
FINE RESOLUTION: 7.5/10
TIMBRE: 8/10
ATTACK CONTROL-SPEED: 7.5/10
MUSICAL ENGAGEMENT: 8.8/10
SOUND VALUE: 8.2/10

BQEYZ is an IEM company from China that has been around for about 10 years. They are known to offer good budget IEM value and interesting hybrid drivers IEMs like the 1DD-1BA-1 piezo tribrid called Spring or lately the 1DD-1 bone conduction driver hybrid called Wind.

Today I will review their latest release, the BQEYZ Frost. Priced 180$, it’s a hybrid using 1x10mm dynamic driver+1 micro planar.



The construction is sumptuous, all thick polished metal that isn’t easy to scratch nor is a finger prints magnet, with back plate made of glass that is blue with snowflakes pattern, very eye appealing. This is completed with an eye-catching dark blue cable that is of excellent quality and adds even more elegance to the whole IEM look. This cable is a single crystal copper and silver plated mixed coaxial cable that can be selected in single ended 3.5mm termination or 4.4mm balanced termination.



SOUND IMPRESSIONS

The MUSICALITY of the Frost is everything but cold, it’s warm and naturally fluid in balance with fully bodied bass and mids with natural timbre of dynamic driver and a speedy but smooth treble handed by micro planar driver.

The tonality is leaning toward mid centric to warm neutral with slight mid bass boost due to bigger than nature (anamorphic) vocal and acoustic instrument lush presence. Piano notes are weighty and full, though not crisp nor long in attack release, both male and female vocals are well rounded without timbre harshness, it’s not the most transparent due to lower mids coloration and air vibrancy within the presence envelope which is softened in definition.

The Frost isn't one of those clean (often clinical too) harman tuned IEM, its no U shape and more of a soft W shape with upper treble roll off. This isn’t for treble head but those seeking an even musicality that feel like being at home, vocal lover will be spoil as well as acoustic music lover since even acoustic guitar is rendered with glorious realism as if BQEYZ goal was to deliver their own conception of colorful yet accurate instruments tone, the planar add hint of attack bite for guitar which gain in tactility and brighten definition without never dominating the mix, same goes for percussions which are speedy and crunchy without being sharp nor overly snappy in dynamic. As well, highs don’t offer sparkle nor clean brilliance, it’s on the dry and bodied side.

This mean it’s not a technical sounding set too and don’t induce wow effect in that aspect, bass isn’t very speedy and controlled, mid bass slam is a bit loose, not finely rounded, bass line can be hard to properly read when it goes lowest note inherent to sub bass section which is rolled off in release, don’t create a lot of resonance nor extend long, for electric bass it’s no issue, we have proper grunt and texture but for double bass attack release in jazz rendering is dark and a bit ‘’one tone’’. Yet, bass line asre vibrant and euphonic, mid bass is round and weighty with good punch authority even for rock music the kick isn't light nor recessed, just a bit darken by this bubbly sustain.

The Frost is a vocal specialist, both male and female way, wide lush presence near the listener, as if the singer in next side of same table than you and what is impressive is how the presence is enough bright yet never shouty or too agressive, .

When it come to treble, it's speedy and full sounding, this micro planar tend to extract micro sound layers in fullness, not thin ackward micro details, then it go in darkness, so no sparkle and brilliance release to be found, but the bite is crunchy and dynamic, without going plain agressive. Another sign of tuning refinement.

The Frost isn’t suggested for electronic music, unless slow like R&B which is a real pleasure to enjoy due to captivating and gently forwards female vocals, main highlight of the Frost.

The soundstage is above average, wide and tall but not deep, it’s too hazy in terms of background and the silence around the instrument isn’t fully transparent.

Imaging is under average, and that even if hybrid driver config permit a well layered macro dynamic, with 2 stages: one for bass and mids and other for percussions and notch of extra air. It’s evident BQEYZ choose their DD based on it's tone and timbre and not on it’s transient speed which is average and on par with way cheaper IEMs. Even Simgot EW200 DD is miles ahead in terms of speed and control of transience.

Nonetheless, the Frost is worth applause in terms of homogeneous balance that isn’t easy to achieve with micro planar, often adding a plasticky attack edge or out of phase timbre and speed. In that regard, it's the opposite of the Simgot EW300. Frost offers an euphonic analogous musicality that is fleshy in tone, nothing sound thin, nothing sound out of place, yet we would like more micro details, texture info, definition contour and ultimately: more competitive technical performance for the price.


COMPARISONS

VS ISN NEO 3 (2DD+1 micro planar-180$)

The NEO3 is more V shape and has more boxy and sibilant male and female vocal, where Frost is notably superior with wider vocal presence and more natural timbre.. It’s not as well balanced in term of drivers cohesions with Neo3, but offer more holographic layering as well as more speedy and round mid bass, though sub bass line are even more compressed than Frost. Everything sound bigger with frost as well as more mid centric, acoustic instrument sound more artificial and boxy and shouty with Neo3, their presence is more centered and bass tend to dominate and distract more from it.

Their no doubt tuning balance is better with Frost, from timbre to fluidity of cohesion which is more homogeneous.

VS HIDIZS MP145

MP145 is brighter, bassier and more U shaped in balance. Soundstage is notably wider, taller and deeper and the treble is snappier, more airy and informative. Bass is more textured and speedy, as well as better separated. Frost is warmer and smoother in balance with fuller and lusher mids and more natural and dense timbre for all sorts of instruments. MP145 has greater transparency for imaging and more open mid range, yet timbre is spiky, wind instrument sound more boxy and shouty and male vocals lack substance and well rounded presence. Mid bass and overall mids note weight is lighter with MP145. Technical performance is superior nonetheless.

All in all, MP145 sound thinner and less smooth in balance but offer superior technicalities from resolution to imaging to soundstage to treble extension and attack control and speed.

CONCLUSION


With about 20 years of experience in audiophile hobby but mostly as passionate music lover, i learn with time critical listening isn’t how you enjoy music, in fact: it can ruin the reaching to the soul and make cerebral a musicality that should be colorful and enveloping

At first listen, it’s never the technical performance that charms my ears, it's the tone and timbre and dynamic balance. In that regard, the Frost excel to deliver highly captivating musicality since your part of music, you get embraced by the natural tone of all instruments and both male and female vocals aren’t recessed nor thin or cold sounding. It was love at first listen and just grew more on me, then for this review I forced myself finding imperfection mostly affecting sense of clarity, which I do find problematic for more complex and savant music like classical, jazz and even rock.

So, nope, the Frost aren’t reference IEM nor suggested to monitor anything but perhaps vocal. It’s musical pleasure without guilt since mid range is what dominates the show yet you don’t lack bass weight and minimal punch nor highs minimal bite.

Sometime, maturity can be found in simplicity and this is what BQEYZ achieve with the Frost, it’s not an IEM that overwhelm your with too much sound info, too much treble aggressivity or too much bass boom and dominancy, it’s a jack of all trade, master of vocalist and acoustic instruments..






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Disclaimer: This is a review sample I personally ask to test, if BQEYZ ask me to pay 50% of price, i would have do it, since it's what I do now. Freebies mean nothing to me. And don't inflict on any type of sugar coating recognition. I would ''bite'' the hand of BQEYZ if I truely found the Frost bad, which isn't the case at all.

To directly support this rather underatted IEM company, you can order directly from their website here (non-affiliated link):
https://bqeyz.com/product/frost/

Introduction​

The BQEYZ Frost is a hybrid IEM aiming to deliver a balanced and detailed listening experience. This review explores its sound quality, build, and overall performance.

Package Contents​

• Ear Buds
• Cable
• Carrying Case
• Brush
• Six Pair of Silicon Ear Tips
• One Pair of Memory Foam
• One Ear Tip Holder

Specifications​

• Model: Frost
• Driver Unit: Dynamic Driver + Micro Planar Transducers
• Dynamic Driver: 10 mm
• Impedance: 32 Ω
• Sensitivity: 113 dB
• Frequency: 5~40kHz
• Cable Length: 1.2m
• Pin Type: 0.78 mm; 2 Pin
• Plug Type: 3.5 mm or 4.4 mm
• Diaphragm: PU and PEEK Composite Diaphragm
• Cable Specification: Silver-plated Coaxial Mixed Cable

Driver Configuration​

• 1x Dynamic Driver
• 1x Micro Planar Transducers

Build & Design​

The BQEYZ Frost has a solid, well-made feel thanks to its aluminium alloy housings. They feel durable in hand, which is always a good sign. The faceplates have this interesting frosted texture that gives them a distinct look – it's a nice touch. Overall, the design is clean and modern, without being overly flashy. It's clear they put some thought into how these things look and feel.

Cable​

The cable that comes with the BQEYZ Frost feels pretty decent. It's not super thin or flimsy, so it doesn't feel like it's going to break on you right away. The connectors seem solid too. It's a functional cable, for sure. Personally, though, I'm not a huge fan of the blue colour. With the overall aesthetic of the Frost being kind of frosty and silvery, a white or silver cable would have matched way better. It's a small thing, but it would have made the whole package look a bit more cohesive.

Fit & Comfort​

The BQEYZ Frost is pretty comfortable to wear. They're lightweight, so you don't really feel them weighing your ears down. They fit my ears well, and I didn't have any issues with them feeling like they were going to fall out. The shape is pretty ergonomic, so they sit nicely in the ear. One thing I did notice, though, is that the seal isn't the absolute best. Passive noise isolation isn't the best, so they don't block out a lot of outside noise.

Testing Gears​

• Cayin N3 Ultra
• iBasso DX180
• Cayin RU7
• IFI Hip DAV V2
• Celest CD-20
• Hidizs S8 Pro
• BQEYZ Lin
• NiceHCK TC3

Tip-Rolling​

The stock tips are nice and good, but I prefer to use DUNU Candy and Final E Pink tips for my review. The listeners may use their preferred tips for their preferred sound.

Sound​

The BQEYZ Frost presents a balanced and enjoyable sound signature, making it a versatile option for various genres. The sound is warm and inviting, creating a pleasant listening experience.

Bass​

The bass is textured, clean, and well-controlled. It prioritizes quality and control over quantity, making it suitable for most genres but perhaps not ideal for dedicated “bassheads.”

Sub-Bass​

The BQEYZ Frost has decent sub-bass performance. According to their frequency chart, the Frost shouldn’t have much of a sub-bass presence, but it is there, and its presence truly makes the listening fun.

It does not have an earth shatteringly rumble, but has decent presence, depth and good extension. Fortunately, it does not bleed into the mids, or sound muddied due to it being well-controlled. However, it may not satisfy “bassheads” as the Frost sub-bass is about quality over quantity.
The sub-bass adds good colour and character to tracks, which makes the listening extremely fun and engaging.

Mid-Bass​

The mid-bass is clean, textured, punchy and tight. It does not overwhelm the other parts of the sound, and stays in its own lane. It has powerful tactile feedback, and is neutral. Moreover, its attacks are quick, well-controlled; it doesn’t feel sluggish, which really elevates the listening experience.

Furthermore, the mid-bass, has good heft in it and is impactful. Frost’s mid-bass shines in the response speed, and it is able to keep up with complex tracks easily.
The mid-bass adds good body to tracks, which makes the Frost incredibly enjoyable to listen.

Vocals​

Male Vocals​

Male vocals are rich, clean, clear, detailed and natural. It has good note-weight and is full-bodied. There is no muddiness or congestion in the lower pitched male vocals, as the bass is well-controlled. Moreover, it has good warmth and outstanding clarity.

The vocals are textured and well-preserved. Also, it picks up the singer’s nuances accurately. Furthermore, the vocals have good separation from the tracks instruments and sounds sweet to the ears. The vocals stay clear and well separated regardless of instruments in complex tracks.

Female Vocals​

The female vocals have warmth, incredible clarity, and are smooth, lush sounding, energetic and airy. The vocals have no harshness, sibilance, or peakiness. Moreover, the vocals are stunningly clear, has good extension and is emotionally engaging.

It feels like the singer is singing directly to you, and has an outstanding surrounding feel. It feels like the vocals are coming from all sides; feels like a blast of refreshing air, and vocals swarming all around you. Finally, the slight upper mid-range adds a sweetness and airiness to female voices without making them sound shrill or harsh.

Instruments​

The instruments have good separation, clarity and are detailed. It has a nice natural timbre, which makes the instruments sound natural without excessive colouration. Individual instruments can easily be distinguished within the mix. The instruments also do not sound congested or mashed together. This sort of instrument sound truly enhances the listening experience.

Treble​

The treble is a highlighted feature of the Frost. It has incredible extension, airiness, detail, and clarity. It is also smooth, and well controlled to avoid harshness or sibilance. Moreover, the treble is so detailed and clear that it allows the listener to hear the shimmer of cymbals, subtle nuances in tracks and the delicate overtones of stringed instruments.

Soundstage & Imagining​

The Frost has a soundstage that is incredibly wide. It has good depth, which allows the listeners to perceive the relative distance of different instruments and vocals within the mix. This adds to the overall sense of immersion and engagement.

The Frost excels in the imaging department! The listener can precisely perceive the instrument placement within the soundstage. Moreover, it has remarkable separation, allowing listeners to clearly understand the vocals, and instruments in a streamlined and non-congested way.

Finally, the Frosts soundstage and precise imaging creates a holographic sound, where the instruments and vocals are placed in a 3D space, which makes the listening extremely immersive and expressive.

Technicalities​

Dynamics​

The Frost exhibits decent dynamics, performing reasonably well in microdynamics, capturing nuances in quieter passages. Macrodynamics are also handled well, with the IEM capable of handling crescendos and impactful moments without sounding constrained.

Transient Response​

The transient response is decent, contributing to clarity and detail, particularly with percussive instruments. It keeps up with complex tracks excellently.

Detail Retrieval​

Detail retrieval is tuned good enough to expose subtle elements in a track without becoming overly analytical or harsh.
The Frost preserves the details without obscuring the way the track is mastered. It does not accentuate the details, but lets them appear within the global picture.

Conclusion​

The BQEYZ Frost is a very solid all-rounder that sounds really nice and balanced, with plenty of detail, a surprisingly wide soundstage, and seriously good imaging. The bass is punchy yet controlled, the vocals natural and clear, and the treble detailed but not harsh, mainly handling most genres well. I appreciate the solid build and comfortable fit.
If you're a real basshead the Frost might not be exactly right. But for the majority of folks wanting a good, balanced listen with some pleasant technical chops, the Frost is definitely worth a look-ESPECIALLY at this price.

Disclaimer
A big thanks to BQEYZ for sending me the Frost for review. BQEYZ provided this unit for an honest and unbiased review, and at no point did they ask or influence me to say anything specific. Every observation in this review is purely based on my personal experience from using the IEM daily. The thoughts and opinions shared here are entirely my own, formed during the time I spent testing the Frost.

If you’re interested in learning more about BQEYZ and their products, you can visit their official website.

For those considering purchasing the BQEYZ Frost, you can grab it from their official AliExpress store. If you’re in Bangladesh, Geek Mart is a great option. They offer official warranty support and ensure hassle-free delivery of BQEYZ products directly to your door.

The BQEYZ Frost has a solid feel right out of the box. The material used is CNC aluminum alloy, and frankly, you can tell it is not just for aesthetics because this thing feels like it can take a few accidental drops without issues. The anodized finish gives it that extra bit of robustness to keep scratches and corrosion away. I have used a couple of IEMs with similar builds, like the Ikko OH10s and the Simgot EA1000, and this one feels right up there with them. After some pretty regular use, there’s barely a mark on it. Also, the matte finish on the inside? Yeah, that’s great because it means no annoying fingerprints smudging everything up. It’s the kind of build where you feel like you got your money’s worth.

Now, about the design – this is where Frost really flexes a bit. The faceplate is just… nice. It’s got this high-transparency crystal glass with an ice-blue color underneath that catches light in a way that makes it look fancy but not over the top. There’s this frosted pattern on the glass – a mix of regular and irregular shapes – and depending on how the light hits it, it kind of glows. It’s subtle but cool. Feels like something you’d actually want to show off. The design isn’t trying too hard, but it’s definitely not boring either. It’s just one of those IEMs which sound as good as they look, which honestly doesn’t happen that often.

The Frost has a relatively small shell design, so I believe most people should have an easy time with this in terms of fit. It fit my ears very comfortably, and I did not have problems even after long listening sessions. I could even use it lying down, and honestly, I do not have a single bad thing to say about its comfort. That’s where the comfort is on a high level for me.

That being said, speaking of fit, one thing that needs mentioning is that the stock tips did not work at all for me. They were always slipping out of my ears, and it was somewhat annoying. I feel like without the proper ear tips, you may experience some issues with fit. This IEM really relies upon the tips and cable for staying secure in your ears, so if neither of those fits well, there is a good chance that the IEM will be falling out of your ears repeatedly.

I played around with a variety of tips, and the best fit for me personally is the ePro EP00 and Final E (clear/pink). If you have any of these, definitely try them. Experiment with others you may have in your inventory to find one that is most comfortable in your ears.

The Frost has, well, a really strong cable. It’s all blue in color to go well with the faceplate. I think white might fit better with the design and faceplate but nothing at all to complain about there on my part. Beyond that, it’s really quite solid, so at this price, I truly never felt the urge or any need to replace it.

The cable itself is a simple 2-core design – one core on each side – which keeps the look very minimal and functional without adding any extra bulk. It has no microphonics and generally behaves well. You can choose between 3.5mm or 4.4mm terminations upon purchase, but there’s no interchangeable termination system. This might have added more functionality, but given the price, what’s available is adequate.

The Frost comes with a stock cable that pairs rather well, and I seriously doubt anyone would feel the need to immediately upgrade. However, if you have some high-quality copper lying about, you might want to pair it up just for kicks and see if it enhances the sound even further.


Honestly, very few brands have been able to impress me in this regard, and BQEYZ is no different. The stock tips felt like trash to my ears. I tried them once and never used them again during testing. I highly recommend experimenting with different tips from your collection after purchasing the Frost. Without the right ear tips, the fit and comfort might be less than ideal.

I did finally settle on Final Clear (pink) and ePro EP00 and ePro Horn-Shaped tips. These sound greatly improved to me. I hope you have one or more of these tips to try on the Frost. Of those I tried, the best for me is the ePro EP00. The Final tips also sounded very good but would slide out a bit when worn and had to be readjusted.

The Frost doesn’t require much power, making it an efficient IEM. I even tested it with BQEYZ’s $13 Lin dongle, and it sounded surprisingly good. The dynamics and resolution weren’t bad at all. That said, if you have a better DAC or DAP, you will get even better output.

Avoid pairing the Frost with bright, analytical, or overly digital-sounding sources, as this can make the IEM sound too sharp. For example, I found that pairing it with devices like the Questyle M15, EPZ TP50, or Moondrop Dawn Pro resulted in excessive sharpness.

Cowon Plenue R2 with KAEI-TAP2

• Cowon Plenue R2
• Astell & kern SP1000M
• Cayin N3 Ultra
• Ibasso DX180
• Hiby R3 ii
• Ibasso DC Elite
• Cayin ru7
• Questyle M15
• ONIX Alpha Xl 1
• KAEI-TAP2
• Shanling H5
• IFI Hip DAC V2
• Xduoo xd05 basic
• Fiio btr7
• IFI Go Blue
• Ddhifi TC44 PRO E2
• Dunu DTC 480
• Fosi audio ds1
• Kinera CD20 And CD10
• Epz Tp35
• Epz Tp20 pro
• Moondrop Dawn Pro
• Bqeyz Lin

Sub-bass
Immediately upon looking at the graph of the BQEYZ Frost, I would think that it has quite a significant amount of roll-off in sub-bass. Usually, a pair of IEMs having such a roll-off can easily render it somewhat loose in terms of musicality. But eventually, when I was able to listen to it properly, I found out that I judged the graph wrongly. It really surprised me that the sub-bass quality of the Frost wasn’t overdone but adequate in quantity to satisfy.

On the Frost, the sub-bass is agile, rumbling along effortlessly, and it’s well-controlled and deep. It is not a slammy or overweight presentation for the hardcore bass heads out there, but it sure is well-balanced, classy, and integrates well into the general sound signature. What’s more important is that it does not bleed into the mids; things are clean and coherent.

Listening to “A Groovy Kind of Love” by Phil Collins, soft thumps of the kick drum felt precise, while the bass guitar was resonating with just enough depth to emotionally root the track without taking too much attention from those fragile piano tones. At the opposite end of the spectrum, “Praise The Lord” by A$AP Rocky and Skepta showed how the Frost handles modern bass-heavy music. The bass line was groovy, had its rhythm, and wasn’t too dominant in this track. The sub was tight, textured, providing the impact to kick drums without hogging too much space and allowing the vocals and hi-hats to pop.

If you value controlled, clean, and musical sub-bass over sheer quantity, the Frost delivers: a sub-bass you feel, perhaps, rather than one that punches you in the chest.

• Note: If you’re a bass head who prioritizes warm and impactful bass above all, the BQEYZ Frost might not fully satisfy your preferences. While its sub-bass is of good quality and offers decent depth, it doesn’t deliver the heavy, dominating bass response that some enthusiasts seek.

Mid-bass
The mid-bass of the BQEYZ Frost is surely one of its high spots: it is tight, punchy, and textured, keeping great control. What I most appreciate, though, is that it keeps in its place—never bleeding into the mids or overpowering the rest of the sound. Attacks are fast and sharp without any indication of sluggishness, which makes the Frost a very good performer for busy and fast tracks.

On “Lux Æterna” by Metallica, the Frost easily took in Lars Ulrich’s rapid double bass kicks. The bass guitar had just enough heft and texture to give it some decent anchor, not quite smearing into the intricate lead guitar riffs, with each kick nicely impactful. But here, the true star was actually the speed of the mid-bass response in keeping up with the relentless tempo of this track and maintaining clarity across it.

Also, listening to “Droppin’ Plates” by Disturbed, the punch of the kick drum was visceral and the bass line very well-presented with much tactility to push the song energy. Yes, even in those heavier and busier parts where the guitars and drums aggressively interplay, the Frost kept them separated and clear without losing one single detail. For rock, metal, or anything with energetic, complex tracks, the mid-bass offers good backbone to the Frost. Quick, controlled, and powerful, it will add excitement without ever getting out of control.

Male vocals
Most of all, it’s this midrange performance that really impresses me as special and unique from the BQEYZ Frost. One of the first things I noticed was how distinctly separate the vocals were from the bass and instruments—like the vocals are playing from a different room altogether. That gives the midrange a certain natural sense of depth and dimension while being captivating.

On “Call Me Irresponsible” by Michael Bublé, the vocals of the male lead sound weighted and rich but never full or bloated. Double bass lingers soft behind while the piano underlines the vocal soft and shy to let the voice of Bublé shine. There is something sweet in the way his lower registers ring with warmth, textured and smooth, sans hints of sounding muddy. The horns enter quietly, never in competition with the vocal line, doubling and furthering that layered separation.

This is really driven home by Grover Washington’s “Just The Two Of Us.” The saxophone cuts through effortlessly in the upper mid-range, while the rhythmic electric piano hums below. The voice of Washington is organic in nature: clear, full-bodied, and without artificial boosts. The voice clarity holds intact even on the sax solo parts, which seem to breathe free around the voices.

Female vocals
Female vocals sound great on the Frost: very alive, dynamic, and smooth without any harshness or sibilance. For example, Chantal Chamberland’s “Simply Falling” simply shines. Her voice is floating above soft plushy strokes of upright bass with silky edges, never sharp even on high notes. Acoustic guitar strokes are articulate, and one can clearly feel each string vibration against her voice.

On “Day Breaks” by Norah Jones, the voice comes back—the warmth that fills her voice into every word, soft and intimate, framed by soft piano chords and snare tapping light. Frost gave her performance air because of the upper mids, with enough sparkle not to cross over into brightness. That is quite a delicate balance, as Jones’ voice is so intimate, nearly as if she sings in your space.

Equally unobtrusive yet not less impressive instrumentally, with the mid-range clarity rich with instruments such as acoustic guitars, pianos, and saxophones, Frost truly does make good use of its ability to separate the layers without losing coherence. No sharp edges, no unwanted peaks, just clean, melodic, engaging sound.

Where Frost really gets going is on vocal-forward tracks. Male vocals have a body and a presence to them, while female vocals soar in elegance. If your listening is all about the vocals, then the Frost breathes life into them with depth, texture, and emotions.

The treble of the BQEYZ Frost is prominent, but it’s not shouting for unnecessary attention. It extends rather well, carries air with it, and brings out those minute details without any hint of harshness or sibilance. Smooth, yet not hindering the clarity that lets the finer elements in the track shine through naturally, such as:

“Man In The Moon (Live) 1997″ by Nils Lofgren – Acoustic guitar work is textured and alive, and you can catch soft shimmers of harmonics and the faint scrape of fingers moving along strings. It’s not overly bright, yet has enough treble extension to let the upper end of each note breathe. There’s a rawness to the performance that comes through, almost like you’re picking up details that aren’t meant to be front and center but add to the live feel.

In “Spring 1 (2022)” by Max Richter, the violins feel crisp and airy, cutting through the orchestral layers without overpowering them. The treble carries the strings with a lightness, allowing the upper harmonics to stretch naturally. The strings rise and decay in such a natural manner, almost not forced or artificially boosted, and with a proper sparkle to really make the bowing texture pop, granting the track a great deal of space without sounding acutely sharp.

That said, cymbals there tend to hold their shape rather well. The decay is soft, yet not rolled off or muffled in any way, but rather it’s just that Frost knows when to show or not show the treble, which ultimately avoids fatigue in longer sessions.

Overall, the treble feels well-balanced – detailed enough to highlight intricate parts of a track but restrained enough to avoid becoming fatiguing. It plays more of a supporting role, adding to the sense of space and air rather than demanding attention.


Soundstage
The Frost presents a balanced soundstage—neither too wide, nor intimate. It leaves space enough for the instruments to breathe but does not place them unnaturally far apart.

In “Is This The World We Created…? (Live In Rio, January 1985)” by Queen, Freddie Mercury’s vocals feel close, yet the acoustic guitar and crowd noise extend slightly outward. This creates the sense of being in the audience without losing the personal touch of the performance. Crowd ambiance adds just the right amount of width, keeping the live atmosphere intact without sounding distant.


Imaging
IImaging is accurate, with instruments correctly placed. Each element on a track feels properly emplaced, with good separation between layers.

In “Time” by Pink Floyd, the individual clock sounds pan distinctly from left to right, creating a realistic sense of movement. When the drums and guitar enter, they stay well-defined in their respective positions. Gilmour’s vocals sit firmly in the center, while the guitar solo floats slightly to the right, demonstrating the Frost’s ability to map out sound with precision.


Speed and Dynamics
The Frost handles fast, complex tracks with ease. It keeps up with rapid transitions and maintains clarity even during busy sections, avoiding any sense of smearing.

“Just Let Me Breathe” by Dream Theater pushes the limits with its fast-paced drumming and aggressive guitar riffs. The Frost captures every drum roll, bassline, and guitar note distinctly. The transitions between loud, energetic parts and quieter sections are smooth, reflecting the earphones’ dynamic capabilities. There’s no lag – it stays sharp and responsive.


Detail Retrieval
Detail retrieval is well-tuned – enough to expose subtle elements in a track without becoming overly analytical or harsh.

In the intro of “Stairway to Heaven” by Led Zeppelin, it brings out the soft slide of fingers over guitar strings and the crisp taps of percussion. Moving further along the track, the Frost preserves detail in the layered guitars and the filling drums so that each is brought forward without obscuring the overall feel of warmth that underlies this mix. It does not accentuate the details but lets them appear within the global picture.


Honestly, one of the biggest reasons I ended up liking the BQEYZ Frost so much is the mid-range. There’s something about it that just feels. different. In a good way. As a reviewer, I go through a lot of IEMs, and after a while, things start to blur together. Same old sound, same kind of tuning – it can get boring real quick. But the Frost? That took a load off me from that. The midrange here really sounds special, almost in a league of its own. Because it did that, listening to anything really turned up the fun and interest value for me.

Besides all that, the Frost keeps up quite well in those other areas—build feels robust, the design looks swell, and it sounds great. Yeah, the stock tips weren’t exactly great, but once I swapped those out for something better, comfort and fit got a lot better. If you’re going to pick one up, I’d say try a few different tips right away—trust me, it makes a difference.

The treble’s detailed, the soundstage feels spacious enough, and that smooth mid-range just ties everything together nicely. It’s not the kind of IEM that tries too hard to impress, but it somehow does anyway. Whether you’re into laid-back acoustic tracks or more complex stuff, the Frost holds its ground.

If you’re thinking about grabbing one, I really think it’s worth a shot. Just don’t forget – tips matter.

Introduction

The BQEYZ Frost is the third IEMS in their Weather series. Originally, I wrote that this series was going to consist of the Wind, Cloud, Rain and Mist models. Wind and Cloud have already been reviewed by this humble reviewer. The third is not Rain, but Frost, an IEMS with a 10mm dual-cavity dynamic driver, PU and PEEK composite diaphragm, plus a custom microplanar transducer that enhances mid and high frequency performance. Tuning is balanced and detailed. As usual, BQEYZ designs beautiful pieces. For this occasion, the design of the outer plate is new and made of slightly curved, high-transparency crystal glass. Its base is ice blue with a frosted textured pattern that lives up to its name. The body of the capsule is made of aluminium alloy using high-precision 5-axis CNC machining. The aluminium has been anodised to create an oxide film on its surface by electrolysis, making it resistant to corrosion and continuous use. The cable has a mixed coaxial construction of silver-plated and monocrystalline copper wires. The monocrystalline copper wires used are 0.04mm and form a 32-wire strand. The oxygen-free copper wires are 0.05mm and form a 20-wire strand for the inner shaft, while the 0.06mm silver-plated wires are used as a 38-wire mesh to recreate the outer ring. Finally, the outer sheath measures 2.3mm. The capsule interface is the classic and secure 0.78mm 2Pin, with 3.5mm SE or 4.4mm BAL pins. Let's take a look at what this new BQEYZ model from the Weather series has to offer in this review.



Specifications

• Driver Type: 10mm dual cavity dynamic driver with PU and PEEK composite diaphragm + custom microplanar driver.
• Frequency Response: 5Hz-40kHz.
• Sensitivity: 113dB.
• Impedance: 32Ω.
• Jack connector: Choice of SE 3.5mm or BAL 4.4mm.
• Cable length: 1.2m.
• Capsule Connection Type: 2Pin 0.78mm.
• Starting price: $179.

Packaging

The BQEYZ Frost comes in a white box with dimensions 159x120x48mm. On the main side you can see a real capsule in all its glory, located on the right side. On its left side you can read the model name and a description of the model. The brand name is in the upper left corner. On the back are the model specifications in three languages and the brand name in black letters. When the outer cardboard is removed, a black box appears with the brand name inscribed in the centre. It opens like a book and reveals a black cardboard with an oval at the top, revealing the capsules inserted in a thick black foam mould. Underneath are the name of the model and its description. Underneath the cardboard is the mould and, underneath it, the classic black zipped case with the brand name in the centre. Inside are the rest of the accessories, including the cable and the metal blister with the silicone tips in two models. In short, the complete contents are as follows:

• The two BQEYZ Frost capsules.
• A blue 2Pin 0.78mm cable and 3.5mm SE plug.
• One metal blister pack containing the silicone tips.
• Three pairs of Atmosphere grey silicone tips, sizes SxMxL.
• Three pairs of white silicone Reference tips, sizes SxMxL.
• One pair of medium sized foam tips.
• One cleaning brush.
• One user manual.
• One warranty certificate.

The content is the brand's classic, but of high quality, without artifice, elegant and very appropriate. The beautiful cable (it's a pity I didn't choose the version with the 4.4mm BAL plug), the blister pack containing the silicone strips and the black leatherette zipped case, large enough to fit the whole model without any sacrifice.



Construction and Design

For this occasion, the BQEYZ Frost capsules have a more conventional shape. It is an uneven oval silver-grey capsule with three very rounded corners. It is relatively thick and smooth on the inside. The outer face is made of a slightly curved, highly transparent glass. The dark blue inner base has a classic frost pattern. On the outer side of the right side of the capsule you can read the brand name and on the left side the model in letters in the same ink as the frosted pattern. On the edge is the 2Pin 0.78mm interface, slightly recessed in a rectangular hole machined from the same metal. Next to it is a mole with white lettering indicating the channel and then an oval slot. The inner face is smooth and rounded at the edges. You could say that there is a machined oval in one corner that has a circular hole in its centre. As I say, the inner face is smooth until the nozzles, at which point there is a small sloping elevation. Above it are the mouthpieces, which are made of polished metal, unlike the textured and anodised body of the capsules. The mouthpieces have three phases, the conical base, the central cylinder of 5.1mm diameter and the outer crown of 5.8mm diameter. The approximate length is 5.3mm and the interior is protected by a thick metal grid. Finally, it should be noted that there is another hole at the base of the nozzles.
The cable consists of two coiled strands protected by a 2.3mm bright blue sheath. It is a mixed silver plated and monocrystalline copper coaxial cable. The monocrystalline copper wires used are 0.04mm and form a 32-wire strand. The oxygen-free copper wires are 0.05mm and form a 20-wire strand for the inner shaft, while the 0.06mm silver-plated wires are used as a 38-wire mesh to recreate the outer ring. The sleeve of the 3.5mm gold-plated SE plug is a simple smooth cylinder with a rounded cable exit and a protective translucent plastic sleeve. The name of the brand can be read longitudinally engraved in white. The splitter piece is another cylinder with the same characteristics, but shorter, which also has the brand name engraved on it. The pin is a metal ring with a hole in it that is somewhat large for its use. The sleeve for the 0.78mm 2-pin connectors is another smooth metal cylinder with a groove near the rounded cable exit. The gold-plated 2-pin connector is mounted on a rectangular piece of semi-transparent hard plastic. The cable has ear guides.
There is no doubt about the design power of BQEYZ, capable of creating very elegant, beautiful and eye-catching unique pieces. The Frost are beautiful and their simple frosted pattern goes far beyond their simplicity to become eye-catching. The shiny metal capsules and their subtly rough texture have the perfect finish for the dark blue outer face. The cable is no different, with a thick, shiny blue sheath and metal parts with a smooth, polished and shiny silver finish. It's a pity I didn't choose the 4.4mm balanced plug. Last but not least, the cable comes with a black velcro strip to tuck it away and the capsules come with transparent foil to protect the outside of the cable.



Adjustment and Ergonomics

Sometimes, the fact that the capsules have a smooth inner side can be a blessing. The protrusions must be very well calculated to form a secure anchor, but they can be annoying. Frost's do not have this bulge and are slightly shorter. With a very rounded and stubby shape, they fit very well and evenly in my ear. The design is sized to fit perfectly, resting completely inside the pinna, with no rotation or movement possible. Despite being slightly thick, they fit very well and hardly protrude. The over-ear cable is unobtrusive and surrounds the ears efficiently.
The inclination of the nozzles is very good and the insertion can be average. However, in my case, as usual, I use my home-made large foam-filled tips. With them I get the perfect fit, efficient transmission of sound waves and a high level of isolation. Outstanding.



Sound

Profile

I can't deny that BQEYZ usually looks for a middle ground between their previous models. On this occasion, the profile of the Frost is very similar to that of the Winter, as you can see, there is also some coolness implicit in the names. It's a smooth tuning that aims for that neutral W profile, with more upper midrange enhancement and extended treble, after a slight control zone. The profile is very balanced and homogeneous, moving in a sub-10dB band between 20Hz and 12kHz. This indicates the neutrality of the profile.



Bass

BQEYZ usually makes dynamic drivers with tight, precise, concise, technical and fast bass. The Frost's are clearly of that style. Again, it is not very pronounced in the sub-bass, but slightly focused in the mid-bass, although it is slightly rounded towards the midrange, with an energy below the rest of the frequencies. However, the weight and volume of the bass is easily perceived. It is not a dedicated bass-heads model, but it has a very good bass range, above neutrality, very enjoyable.
In the very low-frequency pure tone test, a slightly oscillatory 20 Hz first tone is observed, but with very little loudness. However, its physical level is evident, one feels the sensory power of the note and its depth. The 25 Hz tone leaves me somewhat cold in its reproduction, but the 30 Hz tone is close to the BQEYZ level I am used to in this kind of tests: a quite pure tone, compact, subtly coloured, full of physical strength, natural and realistic sonority, with very good balance, without sonorous undulating character and with a lot of volume. One can even notice that the texture is there to add more realism to the note. The translation to real music coincides with what was explained at the beginning of the paragraph: the bass drums are dry, quick to play and recover, with no aftertaste, slightly rubbery and elastic, which adds just the right naturalness and enjoyment to the bass, as well as enhancing the volume and depth.
In the dirty, unwieldy and unfiltered bass test, the Frost's feel like a fish in water, giving a lesson in depth, volume, realism and tuning in the reproduction of complex bass lines. It's true that the Frost's good work slightly sweetens the worst conditions, making them even pleasant. But it does so naturally, uncoloured and true to the original. The result is a deft, fast, voluminous, deep, powerful and technically accurate recreation, capable of reproducing all bass lines and layering the layers without blending them.
It's not neutral bass, it's not just anything: the Frost's give more in bass than the frequency response might indicate, especially in terms of volume, energy and depth. But they are also very good technically and capable of separating bass lines and multiple layers. They are very enjoyable for a bass lover like me. And all this while being very respectful of the rest of the frequencies.



Mids

The first half is quite neutral. There is a slight warmth which is matched by the luminosity, transparency and clarity of the whole register. Again, I note an average balance between body, physicality, presence and thickness of notes. The physicality is not very high, but it exists. Presence is not predominant, but the male voices are felt in all their splendour from start to finish, without standing out in the mix above the rest. And the thickness of the notes is relatively delicate, but taut and strong when necessary. In this way, the mids don't come across as dense or heavy, but expansive, balanced, free and expansive.
Frost also maintains a good balance between the first and second halves of the midfield. It is true that the upper mids are more advanced, but not enough to leave the first half behind. Thus, the female voices are more prominent, but without losing their neutrality to the male voices. The result is a very full mid-range, in which nothing is overemphasised or relegated. There is a good balance between detail, nuances, body, base and harmonics, so that the whole persists in the idea of neutrality and a centred timbre, which does not tend towards anything, but is more natural and realistic.
The brightness is relaxed, but the mix is transparent, the mids are ample and details are perceived as vivid, crisp and well separated. The wide soundstage allows the midrange to feel very explicit, rich, delicate, smooth and musical, despite the large amount of information it offers the listener. This characteristic means that they do not sound intimate and the planes are very well distinguished, as is the stereo recreation, which places great emphasis on the ability to break down the channels independently, but generates the vocals in the centre, at a measured distance from the listener, when the recording suggests it. In this respect, the vocals feel almost tactile, with the instrumentation enveloping them between the channels, achieving a rich and pleasingly immersive sensation, where everything seems within easy reach.



Treble

The treble of the Frost is perceived as softer, maintaining the neutral balance of the rest of the bands. They start with a control zone (slight roll-off) that makes the energy level slightly mitigated. In this way, the treble is not too sharp. However, I feel that there is something in the microplanar driver that corrects the loudness of the treble and makes a more homogeneous and extensive mix than what is shown in the graph. In this way, the treble does not stand out from the whole, but it does show up quite fully and, above all, effectively and extensively in the music. In this way, its timbre comes across as real and the initial softening doesn't seem to affect its loudness or thickness; the notes feel fine even if their energy level isn't too high. I think BQEYZ has used the micro-planar driver in the right way to recreate a high end with the virtues of that driver, but neutralising the energy level that could be excessive at times. This is how it achieves a rich, smooth, neutral and balanced upper range with the rest of the strips.



Soundstage, Separation

One of the strengths of the Frost is its special ability to distinguish, isolate and then mix the channels. These IEMs show great skill in recreating the instrumental image, as they are able to discern where the instruments are coming from and on which side they are played. They also know how to blend them so that everything sounds together and balanced. The stage is wide, with a good amount of volume, expansive capacity, great laterality and evident height. But they are not volatile or gassy, but more attached to the stage. In that sense, their stage is more frontal, without being too enveloping or spherical, but more realistic.
There is a good level of separation and a very good sense of volume, depth, transparency and clarity. But this is not an analytical IEMS where the distance between notes is overly wide. I think it is more realistic and restrained in this respect. It's able to show micro detail, but not in a very obvious or detached way. It feels more analogue, without being confusing. Micro detail is appreciated, but not in an explicit way, but in a more natural and restrained way. But the way the music, notes, instruments and voices are recreated is richer than expected and shows great skill in this regard, showing a lot of detail and nuance very naturally in the scene. In this way, its informative character is high, but realistic and very pleasant.



Comparisons

BQEYZ Winter

This time, the new BQEYZ Frost's worst enemy is at home. It's the Winter, an IEMS with a 12mm dual-cavity dynamic driver, PAR diaphragm, plus another 11.6mm PZT bone-conduction driver. In the Winter, the dynamic driver is larger, 12mm versus 10mm in the Frost. The bone conduction transducer has been replaced by a custom microplanar transducer. The new Frost drivers are smaller and have a slightly curved, high-transparency glass outer face. The Winter's are all-metal, thicker and have a bulge on the inner edge of the capsule. This profile can be critical in the fit for some morphologies and I prefer the smooth surface of the Frost, as well as their smaller size and thickness. The design is beautiful on both models, so it is very difficult to choose one or the other. The cable is not as flashy as the Frost's, but the Winter's four-strand grey cable is somewhat softer and more manageable. The rest of the accessories are the same.
The profile of both IEMS is very similar and I think the differences in the graphical comparison might even be negligible. However, the new Frost's are easier to handle and sound louder with the same power.
For the comparison I used the same home-made foam-filled tips. The differences in fit could also lead to audible differences.
I said that the bass of the Winter was very good, how are the Frost's? Well, I would say as good or better, at least for my personal taste. It seems that the Winter's are a bit more sensory in the lower frequencies, but the Frost's have a bit more power, punch, volume and even more texture. The bass of the Winter is a bit more relaxed, with less energy, with a sonority with a bit more colour, not so dark, but it is also drier, more technical, with a bit more speed, less punch and a quicker decay. The Frost are more fun and also denser, they give the sensation of moving more air, generating more auditory pressure.
The Frost's greater sense of bass pressure makes the Winter's sound a little freer and uncluttered. For some, the bass weight may be a plus on the Frost, but it may also be a detriment to those looking for a more neutral profile.
The upper mids of the Winter's are more splashy and obvious, while the Frost's are a little more muted. It might seem that the Winter's should have more detail, but the Frost's microplanar driver is noticeable in definition, winning out by a little, despite its darker sound. This is noticeable in the first half of the mids, where the Winters seem thinner, but also cleaner, more transparent and brighter. In contrast, the Frost's are fuller, more physical, fuller and denser, but maintain that relatively darker level. Those who want more clarity will opt for the Winter; I go for that fuller, slightly thicker, sweeter feel at the base of the Frost. There's no doubt that this affects the timbre of both IEMS, with that shift to a warmer tendency for the Frost and a slightly more neutral/brighter one for the Winter.
The trebles are tuned very similarly, the difference being in the sonority and timbre of their performance. The Frost's seem a little brighter and thinner, a little punchier, while the Winter's are driven by the rounder characteristic of the PZT driver.
The Frost's soundstage has more volume and, being more splashy, the Winter's are closer, with a more frontal presentation. The Frost's are notable for their laterality, which makes the soundstage wider and almost surrounds the head, though not in a holographic way.



Conclusion

BQEYZ continues to improve and offers us a beautiful new model that seeks to refine its concept of neutral frequency response with a warm touch. The BQEYZ Frost is a hybrid IEMS from the Weather series that combines a dynamic 10mm dual-cavity driver with a PU and PEEK composite diaphragm and a custom microplanar transducer. With outstanding design and construction, the Frost is a mid-sized IEMS with very good ergonomics and a neutral profile with a slight warm tendency and very well balanced. It is smooth and expressive in the high end, subtly dark, deep, dense, physical and voluminous in the low end, while in the mids, the warmth, richness and informative musicality of the ensemble is noticeable. In addition, the Frost's are notable for their great sense of lateral openness, which creates a large, enveloping scene for the ears. All this without forgetting the dexterity to show detail and nuance. Yet another success for the brand.



Sources Used During the Analysis

• iFi GO bar Kensei.
• EPZ TP50.
• Tempotec V3.
• Burson Audio Playmate 2.
• Aune X8 XVIII Magic DAC + EarMen ST-Amp.

Purchase Link



You can read the full review in Spanish here

BQEYZ Frost Review: Neither Cold Nor Dry​

The Frost is Actually Pretty Warm​

BQEYZ is a Chinese brand that’s been making waves in the audiophile community recently. And, while its name is gibberish, its products are the real deal. The Frost, a hybrid dynamic/planar IEM, is the first of their product’s I’ve listen to. It had recieved strong feedback from people I trust, so I placed an order for one. Well, it has arrived and has been one of the most interesting and entertaining IEMs I’ve reviewed in 2024. Let’s get into the specifics!

You can find the Frost for sale in the official BQEYZ AliExpress store for $179, here.

About My Preferences: This review is a subjective assessment and is therefore tinged by my personal preferences. While I try to mitigate this as much as possible during my review process, I’d be lying if I said my biases are completely erased. So for you, my readers, keep this in mind:

• My ideal sound signature would be one with competent sub-bass, a textured mid-bass, a slightly warm midrange, and an extended treble.
• I have mild treble sensitivity.

Testing equipment and standards can be found here.

Tech Specs​

• Drivers: 10mm PU/PEEK Dynamic Driver + Micro Planar
• Impedance: 32 Ω
• Sensitivity: 113 dB
• Frequency: 5–40KHz
• Cable: 0.78mm-2 Pin SPC Coaxial, 3.5mm or 4.4mm termination

Sound Signature​

Sonic Overview:​

The Frost’s tuning is atypical for IEMs with its driver configuration. It features a well-extended, but gently emphasized, treble with a solid vocal spike in the upper midrange. Its lower midrange is linear with a warm tilt, while its mid-bass is lifted. The Frost’s sub-bass sits above its mid-bass and gives it a woofer-like tone. This arrangement gives the Frost a resolving, but solid, sound.

Sonic Breakdown:​

Treble: Songs used: In One Ear, Midnight City, Outlands, Satisfy, Little One, Show Me How To Live (Live at the Quart Festival), Bittersweet Symphony

Unlike many other planar and planar-hybrid IEMs, the Frost’s treble is not sharp or aggressive. It is well-tamed and integrated nicely with the rest of sound signature. Songs that are usually sharp sound great through the Frost, underscoring how flexible it is. Satisfy is often a difficult listen on planar IEMs, but not the Frost; its usual sibilance is neutralized while its texture queues and micro-details are largely preserved. Midnight City is an enjoyable listen as well, with the Frost building up m83’s electric cityscape with competence. I find that colder, brighter IEMs often do a good job of creating a sense of emptiness and space in this song, which is something that the Frost didn’t seem to nail.

Total resolution in the upper register is excellent for this price segment and underscores the Frost’s high-quality design and component selection. It leverages its planar driver to grab, resolve, and stage a huge amount of treble detail. Bittersweet Symphony’s treble-bound cacophony was neatly ordered, with the Frost layering, but not spacing, the different string, percussion, and digital instrumentation.

Midrange: Songs used: Flagpole Sitta, Jacked Up, I Am The Highway, Dreams, Too Close, Little Black Submarines, Bohemian Rhapsody, Cash Machine, Chasm, A Better Bridge

The Frost’s midrange tuning will make or break your ability to enjoy it. If you’re like me, and have flexible midrange preferences or enjoy warm / linear mids, then the Frost’s tuning will likely suite you. And, personal preferences aside, the itself Frost seems to have a strong preference to music featuring higher-pitched male vocals and female vocals. Deeper vocals don’t benefit as much from the planar driver’s upper-mid lift and can sound deflated, at least to my (V-shaped-accustomed) ears. This is, of course, a common feature of warm or flat midranges, so while this might be what you want, it’s important to understand what you’re buying.

Some songs, like Thrice’s Better Bridge can sound close together and difficult to pierce. This is an artifact of the Frost’s linear mids, and one that would turn-off listeners who enjoy traditionally-tuned midranges. But other male singers like Oliver Tree sound flawless through the Frost. Tracks like Cash Machine and Cowboy Tears sound as through they were the benchmark BQEYZ used for tuning. The Frost captures a healthy amount of vocal texture, very rarely blurring or dropping hints of distortion or grit. On the other end of the mastering spectrum, Bohemian Rhapsody’s careful arrangement or melodies and harmonies posses a floaty-ness that is simply addicting. The bass guitar and piano dance carefully in the background, with the former providing much-needed warmth while the latter adds rhythmic punctuation to the vocals.

Bass: Songs used: Moth, Gold Dust, In For The Kill (Skream Remix), War Pigs (Celldweller Remix)

When BQEYZ says that they tuned the Frost carefully, they mean it. Its bass is taught and well-controlled, delivering substance and richness to the lower register without overwhelming the already-thick midrange. Mid-bass and sub-bass are blended organically, delivering punch and rumble as needed.

Do note that the Frost is NOT a bass-head IEM. It has a notable roll of from 50Hz down to 20Hz meaning that, while it does rumble in songs mastered to rumble, it does not do so as a matter of policy. It also is lacking in true visceral punch the way one might find on a FatFreq IEM or the Campfire Astrolith / Trifecta. This is by design, and the Frost’s goal is to give you a respectful, full-spectrum view of your music, not just of the lower register.

The Frost’s bass is flexible, articulating bass guitar notes in Moth with clarity and weight. War Pigs (Celldeweller Remix) is likewise a great listen, as the Frost is capable of resolving a wide variety of bass cues; rolling bass guitar strumming provides a solid wall of sub-bass while electronic instrumentation throws punches of mid-bass in the drop. The Frost maintains separation and shape throughout the entirety of the song — a testament to its control and precision.

Packaging / Unboxing​

The Frost’s packaging is fairly standard, but acceptable for its price. It is essentially three layers: An outer color-printed sleeve, an inner display layer that is stored beneath a magnetic flap, and the main chamber that holds the case, cable, and accessories.

Build​

Construction Quality​

I usually have a plethora of nit-picks with Chi-Fi manufacturers, but BQEYZ has managed to dance around most of them with the Frost’s physical design.


The Frost’s shells are made from CNC’d aluminum, with faceplates built from gently-curved glass. Beneath the glass is an intricate design that pays homage to the Frost’s winter aesthetics.



On the top of the shell you’ll find the 2-pin sockets as well as a rectangular vent for the planar driver. On the inside face of the Frost you can see more vents, though these are used for the dynamic driver.



The Frost’s nozzles are also built from metal and have well-designed lips that secure eartips in place firmly.



After a string of disappointing cables in previous Chi-Fi reviews, I’m actually really pleased with the Frost’s cable. It comes in 3.5mm and 4.4mm flavors, with my unit coming equipped with the former. While not entirely free from cable memory, the Frost’s stock cable is considerably less finicky than some thinner cables I’ve dealt with in the past.

Comfort​

Accessories​

Source: AliExpress


Inside the box you’ll find:

• 1x semi-hard carrying case
• 6x pairs of silicone eartips
• 1x pair of foam eartips

This isn’t the largest selection of eartips I’ve seen at this price point, but it is a good one nonetheless. The included silicone eartips are high quality and feature varied bore diameters.

The carrying case is large enough to comfortably store the IEM, cable, eartips, and a small dongle without crushing anything, which is a major plus. As a nitpick, it would have been nice if BQEYZ could brand their cases without included the (R) on the front, as it looks cheap.

The real only criticism I have with this accessory package is the lack of variety of foam eartips. The included pair is very small and simply doesn’t seal in my ear. I tested some third-party foam eartips and found that they provided me a vastly superior seal. Perhaps including a medium-sized pair of foam eartips instead of small would be a good compromise without going all-in on a full set.

Comparisons​

1: Meze Alba ($159)

The Alba is a much smaller IEM, owing to its single-driver configuration. It features a more organic shell design and ultimately is more ergonomics than the Frost. I don’t have any discomfort with the Alba, while I occasionally do with the Frost. That said, the Frost’s deeper nozzles give me significantly better passive isolation.

As for sound, the Alba has a more traditional, cooler tuning. Its midrange is leaner and softer, making it more flexible but less resolving. The Alba has a stronger mid-bass but softer sub-bass, with the Frost rumbling more often and with better control.

Sound preference and ergonomics are the deciding factors here, so your anatomy and ideal sound signature will be key in determining which IEM to choose.

2: Kiwi Ears Canta ($79)

The Canta is literally less than half the price of the Frost, but is still an interesting comparison as the two IEMs share a driver configuration.
The Frost, as one might expect, utilizes more premium materials, has a nicer cable, and has a more spacious case with a wider variety of eartips. This is all baked into its higher MSRP.

Sound-wise, the Canta is V-shaped and very bright. It has a strong planar presence in its upper-register, and by comparison sounds sharp. The Frost has a stronger, weightier vocal presence with a more pronounced mid-bass. Overall balance is better on the Frost, with the Canta’s dramatic treble clearly designed to appeal to treble enthusiasts.

If you really want a planar hybrid on a budget, then at less than half the price, you’ll probably go with the Canta. If you enjoy linear midranges with a warmer tilt and have the cash to spare, then you’ll definitely want to go with the better-tuned, more detailed, Frost.

3: Roseselsa QT-9 MK3 ($159)

These two IEMs are similar in price and are both hybrids, but vary greatly on sound profile. The QT-9 MK3 features a bassy V-shaped sound signature designed to appeal to mainstream listeners, while the Frost’s approach is more nuanced.

The QT-9 MK3 has a traditional midrange with an elevated vocal range and recessed lower-midrange, contrasting the Frost’s warmer and more linear mids. The Frost has an emphasized lower-register, but to a much lesser degree than the QT-9 MK3 which could arguably be described as a bass-head IEM. The Frost has a less-aggressive treble than the QT-9 MK3, and feels more organically-tuned. Both IEMs fetch a similar amount of detail in the mids and treble, with the winner simply being whichever one suites your preferences better.

My personal call between these IEMs is a tie. The QT-9 MK3 costs less and fits better in my ears, while the Frost has a more organic treble and premium materials. The QT-9 MK3 also has a much more pronounced sub-bass rumble, which to me, is a very valuable trait.

Conclusion​

The BQEYZ Frost is a solid, well-tuned IEM featuring competitive performance with great build quality. Not everyone will enjoy the Frost’s linear midrange, but those who seek such a sonic feature have historically been stuck with piercing, sharp IEMs. The Frost is a game changer for those listeners and a breath of fresh air for those who are bored with Harman-target IEMs.

Who This is For​

• Listeners seeking a linear midrange with a fun treble and solid bass
• Listeners who want something unique and resolving
• Planar enthusiasts
• People who’s favorite color is blue

Who This isn’t For​

• Listeners who want main-stream or traditional V-shaped tuning
• Buyers who want a truly-neutral IEM without emphasis or color
• Bassheads
• Buyers with small ears

I want to give the Frost a 5/5. That’s what it scores for my personal enjoyment, but its tuning is polarizing — not everyone is able to enjoy a midrange like this.

BQEYZ, don’t change the Frost’s tuning. It is statement piece, a declaration of skill and vision. And while it could use an ergonomic touch-up, you can never appeal to everyone, especially when it comes to audio.

Thank you for reading, and as always, happy listening!

BQEYZ FROST review
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One of the best-sounding near-neutral below 200 dollar IEM that I've heard.
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The BQEYZ FROST (179 USD) was sent to me through a review tour group that was conducted by BQEYZ Audio. Thank you, BQEYZ Audio.
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The packaging is good and easy to open; it includes a set of wide bore eartips, a set of normal bore eartips, and a pair of foam eartips. The cable that it came with is a fixed 3.5mm but is available in 4.4mm during purchase. It also includes a very nice carrying pouch that can fit the IEM with the cable and a medium-size dongle DAC/amp.
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The IEMs themselves look very good, are classy, and feel very high in quality. The shell is metal with a beautiful glass front plate. The IEM shells feel like high-end products.
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Power handling, drivability, and sensitivity:
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The frost can take a lot of power and can go very loud without distorting; your hearing will be the limiting factor. It is easily driven with my small dongle DAC with connexant chips such as the QKZ TC MAX PRO, BGVP T01s, and BQEYZ LIN, among others. The sensitivity is average, which is good, as I like my IEMs to have similar loudness when I switch between them.
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Sound signature:
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The BQEYZ FROST sounds very neutral with a slight lower bass, upper midrange, and upper treble boost, forming a slight W-shape sound signature, but very neutral sounding in general. I'm happy with the way it is tuned because it sounds very dynamic, unlike other sets that have neutral tuning but sacrificed dynamics and sound anemic.
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The bass is slightly boosted. It sounds very clean, textured, detailed, punchy, and deep. It sounds very neutral and doesn't dominate or slow down the overall sound of the FROST. One of the best bass quality I've heard.
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The midrange is very clean, clear, and dynamic. There is a very slight upper midrange rise, but it is never shouty; there is no frequency that suddenly jumps out at you unnaturally, indicating the use of a high-quality driver with low distortion.
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The treble is handled by the micro-planar driver and sounds very extended and well behaved; there are no sharp peaks that can be heard. It has very good smoothness while having very good dynamics at the same time. It sounds transparent, open, crisp, and airy, with a hint of gentleness that can be found on good planar drivers.
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Technicalities:
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The stage is slightly wider than it is deeper; it has an atmospheric sound and is certainly above average in size.
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The imaging is very good; it may not be the most pinpoint imaging that I've heard, but the instruments and vocals have ample space between them that gives it a fair amount of holography, which makes the listening experience very enjoyable.
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The detail retrieval and resolution are very good and certainly above average. There is a good amount of perceivable micro-details and instrument separation.
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Compared to QoA Mimosa (99 USD):
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The Mimosa belongs in a lower price bracket, but it has a similar driver configuration with the FROST. The Mimosa is V-shaped; it has a very boosted bass, much more than the FROST; it has a more reccessed and darker-sounding midrange; and the treble is more boosted, forming an overall more contrasty sound. I find the frost to sound more mature between the two.
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Compared to BQEYZ Cloud (169 USD):
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This is not a direct comparison, as I don't have it right now; this is based on memory, so I won't go too much into details over this; I can only share the general and most apparent differences. The FROST sounds more detailed and more dynamic. Both have similar near-neutral tuning.
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Compared to Juzear Butterfly 61t (199 USD):
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The 61t is smoother and less dynamic sounding, but the FROST is not far behind in terms of smoothness. The bass on the 61t is sub-bass focused, while on the FROST it is a balance between the mid-bass and the sub-bass. The 61t has a warmer overall tonality and a lower upper midrange level. The upper treble in the FROST is smooth, but it is even smoother on the 61t.
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Compared to Letshuoer Cadenza 4 (249 USD):
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The FROST sounds very neutral compared to the brighter-sounding Cadenza 4, but both exhibit similar levels of dynamism, with the Cadenza 4 very slightly ahead. The Cadenza 4 has a wider soundstage and more imaging separation, at the expense of it sounding brighter and less neutral. The Cadenza 4 seems to me to be geared toward people who like bright and vivid sound, while the FROST is geared toward people who like neutrality.
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Compared to Moondrop MAY (79 USD):
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They are not in the same price bracket; the May is only here due to its similarity in driver configuration with the BQEYZ FROST. The May sounds warmer and bassier, has a U-shaped sound signature, and has a laid-back detail presentation. Both of them have a very extended upper treble due to their use of microplanar drivers for the treble. The frost is more neutral-sounding in comparison.
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Pros:
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Very good neutrality
very good dynamics
Beautiful and classy design
Great build quality
Nice set of accessories
Good value for money
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Cons:
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I wish the cable was modular, but for the price, it's hard to ask.
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Conclusion.
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What I really like about the Frost is the way it balances neutrality with good dynamics, as I find most neutrally tuned sets to lack energy. The FROST is a very versatile IEM that would suit the majority of listeners; it has very good and linear perceived frequency response, great musicality, low distortion, dynamic sound, good price, and so on, and for that, the BQEYZ FROST gets my highest recommendation.
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Happy listening, Cheers!
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BQEYZ Audio
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https://bqeyz.com/

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