Whizzer A15 Pro Haydn

  1. Watermelon Boi
    Whizzer A15 Pro / Whizzer A15: Feisty little peas
    Written by Watermelon Boi
    Published Jun 10, 2018
    Pros - For A15 Pro:
    --Great choice for those who seek flat
    --Flat, airy, dense sound
    --Better details and performance than A15
    --Generous amount of accessories

    For A15:
    --Great entry model to start with
    --Plentiful bass & likable sound for general users
    --Generous amount of accessories
    Cons - For A15 Pro:
    --The fit may be shallow
    --The case could be bigger
    --Not meant for bass lovers

    For A15:
    --The fit may be shallow
    --The case could be bigger


    Chi-Fi has been flowing through the audio market recently. Whizzer is one of the new Chinese brands that came up recently and they've announced their first product, the Whizzer A15. During then I started to have interest on them, though one fact came to me as a concern; barely any information was available about the brand back then. I’ve thought they could possibly be those typical DIY earphones available on the Chinese markets, but soon I've realized that wasn’t the case here. Anyway, the A15 Pro is the second product they've recently released and meant to be a Hi-Fi version / upgraded version from to the A15. Today I'll be reviewing both the A15 and the A15 Pro and also do some compare and contrast about their sound.

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    Both A15 and A15 Pro comes with a neat, decently sized box. There's a little difference in presentation and included accessories, but they're pretty much similar; A15 Pro comes with a leather case, 3 pairs of soft silicon eartips, 3 pairs of hard silicon eartips, 2 pairs of foam tips, and some paper works while A15 comes with all those accessories but an addition of a tweezers and a set of filters.

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    Earpieces / Cables

    The earpieces have a pea-like shape which are meant to be worn over-ear. It has a MMCX termination and the built quality is great, since these are all made out of metal. The A15 Pro has a matte black finish while the A15 has a silver hairline finish, and both looks great in terms of design. Both A15 Pro and the A15 comes with a mmcx - 3.5mm OFC cable with an integrated earguide. The one from A15 Pro appears to be better in both quality and performance, but not a drastic difference.

    Now due to the shape of the earpiece, both A15 and A15 Pro have light depths when they're inserted to my ears. That's fine, though I've found the L-shaped mmcx connector stopping me from tilting the earpieces a bit more backwards. It’s pretty much up to your ear shape whether you'll have these problems, but at least I did. Switching it to a straight mmcx cable would likely solve this issue, but an easier solution is to use eartips that have longer stems like the ones from KZ. Definitely not everybody's going to have this problem, but keep this in mind in case you have problems with the fitting.

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    Sound - A15

    Before moving on, I’ll have to note that there are two versions of A15. They look almost identical, however the only difference is that the newer version has a SN number and a has a metal mesh that covers the inner vent (not the nozzle though), while the earlier version doesn’t have either of them. I’ve chose the newer version to be the reference for the review and will leave some info about the sonic difference between the two versions at the end of this section. The overall sound signature is slightly V-shaped with an emphasis on the mid-bass.

    Bass feels smooth, meaty, and takes the major role throughout the frequencies. It dives deep, responsive, and has good punch on the mid bass. It also shows adequate resonance; however not to the point where it screws up the higher frequencies and make the overall sound soggy. I’m pretty picky when it gets to loosened up bass and didn’t particularly find A15’s bass to be disappointing, so no big worries about that.

    Mids sound rich and bold, without being particularly recessed or pulled forward. The thickness on the vocals are slightly on the thicker side, showing nice performance on both male/female vocals, however does a slightly better job on male vocals. Mids on A15 tend to sound relatively even throughout the mid frequencies. Sibilance is not present here, however it does get slightly brighter and sparkly.

    Trebles on the A15 feels to be a bit more highlighted than the mids, roughly about 20%. It also sounds brighter and clearly presented even during bass-heavy tracks with a good separation. The texture feels to be crispy and pretty natural as well. The scale of the staging is decent, though front/rear staging feels be on the narrow side.

    Brief notes about the older/newer A15: The new version sounds a bit more sparkly, more controlled on the mids, and has better separation between bass/mids. The bass became denser with a slightly lesser amount, whereas the older version sounds to have a bit more loose but spatial on the lowends, also a bit bloated on the mids. The differences are pretty visible here, but I don’t consider to be drastic. The newer ones definitely sounds better to me.


    Sound - A15 Pro

    Bass amount from the A15 Pro is more on the lighter side, just having a bit more bass than what’s called flat. It hits with a firm punch and then quickly steps back. The bass here doesn’t express much resonance and ultra-lows/lows doesn't take a big role here, meaning that these likely wouldn’t be appreciable for bassheads. However mid-bass is adequately present with some good darkness, so it won’t sound completely hollow at the bottom. A15 Pro would be more adequate for those who enjoy flat or treble enhanced IEMs as these bring a very clean, unbloated bass.

    The main dish on the A15 Pro are the mids and highs, taking dominance of the overall sound signature. It somewhat makes me feel like this is how it would sound if there's something that sits between in-ears and earbuds. A15 sounds widely opened with great airiness, just like an earbud while consisting the distinct yet dense sound of an in-ear. Mids are slightly on the brighter side, though A15 Pro manages to keep the mid frequencies pretty even without piercing frequencies, so it doesn’t get too hot or fatiguing. The thickness on the vocals are bit thinner than neutral, making a very nice match with female vocals. Male vocals show adequate thickness, however the mids here sound more feminine so not the best choice if you're looking for meaty vocals.

    Upper mids and trebles are very sparkly, transparent, and clean. I’ve seen some treble enhanced IEMs (or with light bass) to have messy and unorganized highs, but that’s not the case here. The mid/highs are well tamed, producing quite refined high notes. A15 Pro also managed to stay away from the texture feeling dry or grainy, so more points added to the score.



    Although A15 Pro is listed on the higher league overall, I still consider A15 to be worth the money, since there's a big difference in sound signature and price. I surely consider A15 Pro to be on the higher rank than A15. A15 Pro is one of the most open-sounding IEMs I've tried and I much enjoy them listening to tracks from female artists. The Pro model sounds more organic and natural on mids/highs, as well as having better clarity and texture presentation compared to the A15.

    But again, the price gap is big enough to justify A15's performance, and I'd still recommend A15 for those who are looking for a budget, entry model to start with. Besides, the sound signatures are very different between these two, so A15 could actually be a better choice for those who need pleasant amount of bass. A15 has a likable sound for most people while there's a chance for A15 Pro to be a lemon, depending on your personal preference.

    I'd definitely consider either of them to be worth the price and I like the fact that they've put much attention on the build quality, packaging, and especially on accessories as well. I think it's a firm start and like to see how they advance themselves!

    Thanks for reading!
    Visit aboutaudio.org or follow on Instagram for updates and reviews.

    Thanks to Whizzer for providing the A15 Pro and
    Penon Audio for providing the A15 for an honest impression/feedback.

    The newer version of the A15 was purchased by myself.
    I am not affiliated with Whizzer or Penon Audio and none of my words were modded or asked to be changed.
      robervaul likes this.
  2. crabdog
    A technically superior successor of the original.
    Written by crabdog
    Published Jan 2, 2018
    Pros - Highly resolving and detailed.
    Excellent build quality.
    Cons - Included cable could be better.

    Whizzer is a relatively new earphone company that released their first product in 2017. That first earphone was the A15 and I was quite impressed by it, particularly it's fantastic, airy treble. You can read about it in my Whizzer A15 review. Today I'll be looking at the company's latest release, the Whizzer Haydn A15 Pro earphone.

    Disclaimer: This sample was provided for the purpose of an honest review. I'm not affiliated with the company and all observations and opinions here are my own, based on my experience with the product. You can get the Haydn A15 Pro on the official AliExpress page here

    Driver: 10mm Beryllium Dynamic
    Sensitivity: 98dB
    Impedance: 16Ω
    Frequency response range: 20Hz - 40kHz
    Connections: Angled 3.5mm / MMCX
    Housing material: Stainless steel
    Cable length: 1.2m
    Wire material: 6N OFC
    Dimensions: 18x17x15 (mm)
    Weight: 8.9g

    Packaging and accessories

    The Haydn experience begins similarly to the original A15, with a black box encased by a white cardboard sleeve. On the front is an image of the earphones. On the back are the specifications and an exploded diagram, detailing all the components that make up the IEM.

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    Upon opening the box you're presented with everything beautifully laid out and secured in black foam. On the left side is the excellent assortment of eartips, all held by the also excellent metal plate, which can be used as a stand. That's a unique and classy way of doing things. I approve. There are four types of eartips provided.

    • 3 x. pairs "Reference" silicone tips (S, M, L)
    • 3 x pairs "Transparent" silicone tips (S, M, L)
    • 1 x pair "Reference" foam tips
    • 1 x pair "Transparent" foam tips
    The two different sets of tips vary in shape with the reference ones having a more circular shape and narrow bore while the transparent ones have more of a conical shape and wider bore.

    On the right side are the Haydn A15 Pro earphones and the tan colored storage case with magnetic seal. The case is made of protein leather and is the perfect size for holding the earphones and being pocket friendly at the same time.

    Lastly, under the eartip plate is a user manual and warranty card. Although it appears simple, it's apparent that someone has put some serious thought into the layout of the packaging.

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    Build, comfort and isolation

    Just like the original, the Haydn A15 Pro earphone has metal housings and a very solid build. In fact the build is almost identical to the original but this time the finish on the housings is a dark gray and has a matte finish. They're fairly small but have some weight to them and feel very sturdy. All rounded edges here too which is always a good sign. The join between the two halves is really well done with no gaps in between.

    On the outer side is the Whizzer logo in white. The inner side has Whizzer printed in white along with Left and Right markings - something that I believe every IEM should include. There's also a vent/bass port on the inside here.


    The nozzles are angled and have a good lip to securely hold the eartips in place. There's also a gold-colored mesh covering the nozzle ends to keep out ear wax and other debris. Classy! Overall the build quality is top notch and is in line with what you can expect with something around the $100 mark.


    Now onto the cable which is where things take a downturn. The look and feel of it is somewhat cheap. I'm not a fan of braided cables and this one just doesn't feel as premium as the earphones themselves or the rest of the package. The actual cable core however is a very good quality 6n OCC.

    This time around the memory wire on the Haydn A15 Pro earphone is a huge improvement over the stiff and unyielding ones that came on the original. It's very pliable and much easier to work with. You'll hardly notice it's there at all for the most part.

    Above the Y-split the cable is rubberized and I really wish the bottom section was the same instead of having the braided cover. The Y-split is nicely done, and has A15 in gold print on one side and Pro on the other. There is also a chin slider which is always a plus. The cable terminates in a 3.5 mm gold-plated L-shaped plug with good strain reliefs.

    What really hurts the cable the most though is the long, angled MMCX connectors. It was literally impossible to get a good fit and seal because of these. I have larger than average ears but nothing freakish or unusual. The shape and angle of the MMCX connectors made it simply impossible to get a proper fit. Just like the original A15 I had to switch to a third party cable to be able to wear these earphones. I think this is something the company needs to make some revisions on in future releases. I will say though that the MMCX connectors themselves, just like the original A15 are excellent. They're sturdy yet easy to disconnect and have a satisfying click.

    Comfort and isolation

    Once I had changed to another cable I found the Haydn A15 Pro earphone to be very comfortable. The housings sit nicely in the ears and the rounded edges provide great comfort.

    The housings are quite small so even though they are metal the noise isolation is about average. It's certainly on par with most IEMs and suitable for everyday use.



    Gear used for testing
    Although the Haydn has a low 16Ω impedance the beryllium drivers do like a bit of power to bring out their best. While you can drive them with a smartphone you'll need to turn up the volume quite a lot - on my Galaxy Note 5 I had it at 90% or more depending on the recording. Best results can be had when using a dedicated DAP or headphone amplifier.

    After hearing the original A15 I was definitely not expecting what the Whizzer Haydn A15 Pro earphone delivers. It's refined, resolving and loaded with details. With a near neutral bass and somewhat lean midrange this is a completely different beast than its predecessor. It's almost clinically clean but is still musical and emotive.

    Bass is tight, textured and detailed but it doesn't have a lot of impact. In fact it's quite close to neutral. Some people will surely love this kind of presentation but if you're a basshead then you would be better served by the original A15. Driver speed is fast and these can handle complex bass lines with finesse. There's no sign of sluggishness or bloat whatsoever. Sub-bass extends well, has a short decay and is extremely controlled with no hint of distortion in the driver or housings. For my personal preference these take a little too much of the fun aspect out of the bass but from a technical standpoint the Haydn A15 Pro earphone is masterful in this area.

    Midrange is a highlight of the Haydn A15 Pro earphone. Thanks to the tightly controlled bass there's no bleed or contamination from the low frequencies. The amount of detail is pretty remarkable for an earphone in this price range and the Haydn is highly resolving in this regard. Deft and agile, the Haydn easily handles complex passages and does a great job of keeping elements separated. For those who enjoy picking up the minute details in music this would be a good choice.

    The Haydn A15 Pro earphone shares many similarities in its treble with the original A15 and that is a good thing. There's plenty of extension and the same airiness that made the original A15's treble so impressive. There some sparkle and energy but at no time does it become strident or offensive. Hi-hats and cymbals have good timbre and sheen. This is an area where the A15 series is very strong.

    There is more width than depth but it portrays quite a large stage and space, thanks to that fine treble and clean separation in the midrange. Imaging is also nice with solid coverage of the headspace and good positional information.


    Whizzer A15 (original) ($69 USD)
    Let's start with the similarities here, rather than the differences. Treble. The original A15 and the Haydn A15 Pro earphone share a similar, airy treble. It's not harsh and won't poke icy shards into your brain but is well extended with some added sparkle. It's really good. But that's about where the similarities end.

    Bass on the original A15 is big. Big and boomy and fun. The Haydn on the other hand is very reserved and conservative in the bass. Whizzer's Haydn is also noticeably leaner in the midrange and there's virtually no carryover from the bass into the lower midrange.

    Basically what you're getting with the A15 is a fun, V-shaped, bordering on basshead IEM and the Haydn A15 Pro earphone moves in the opposite direction. The Haydn Pro is linear, with a near neutral bass, more details (crazy detail) and a more balanced approach.

    TFZ Exclusive King Experience Version ($99 USD)
    Has significantly more mid and sub-bass impact. Simirlarly lean midrange but has a more noticeable peak in the upper mids while the Haydn has a more linear rise. The Exclusive King has less sparkle in the treble and instead focuses on the upper midrange. Both earphones have a similar soundstage that is fairly spacious and wide.

    In terms of comfort TFZ's IEM feels more secure in the ears and offers better noise isolation. Build quality on both is excellent for their respective prices.



    Whizzer's Haydn A15 Pro earphone is so far removed from the original it's surprising the company didn't give it a completely different name. While it does retain similar characteristics in the treble, the rest of the spectrum is a vast departure from its predecessor.

    However the Haydn A15 Pro earphone has it's own merits, particularly in its resolving nature and excellent detail retrieval. It's another of those "audiophile" tuned IEMs of which we've seen several lately. Is it a worthy upgrade over the original? Well that depends what kind of sound you like. Either way, the Haydn A15 Pro earphone is technically impressive and for its sound I would definitely recommend it. The only caveat is that I'd suggest you have a spare cable on hand just in case.

    *This review was originally posted on my blog at Prime Audio. Hop on over to see more like this.
      crezo, HiFiChris, Cdog and 2 others like this.
    1. crezo
      Great review! I Finally picked up some a15s today and love everything about them except the low end. They're just lacking a bit in the deep buttery sub bass I like.

      Everything else is superb though and an absolute steal at the price!
      crezo, Jun 12, 2018
  3. Cinder
    Is Going Pro Really Better?
    Written by Cinder
    Published Dec 31, 2017
    Pros - Clear and detailed sound signature, good separation, decent cable, solid housing construction, good earguides, nice eartips selection, good packaging
    Cons - Earguides not particularly durable, MMCX connectors don't prevent rotation
    Whizzer A15 Pro Review: Is Going Pro Really Better?
    Whizzer is an up-and-coming brand from China trying to leverage their technical know-how to charm the Chi-Fi market. However this market is saturated, and you can find a new IEM being released every week. Despite that, Whizzer caught my attention with their original A15. Its warm sound signature was mellow and heavy without sounding bad, its construction was solid, and its packaging was… thorough. So in my mind, I imagined that the A15 Pro would be a refined extension of that. And in many ways, it is. But it also deviates sharply from the mantra of the original A15. Is it for the better? Well, let’s talk about it.

    You can find the Whizzer A15 Pro for sale on Aliexpress and Penon Audio for roughly $125.

    Disclaimer: This unit was provided to me free of charge for review purposes. I am not affiliated with Whizzer beyond this review. These words reflect my true, unaltered, opinion about the product.

    Preference and Bias: Before reading a review, it is worth mentioning that there is no way for a reviewer to objectively pass judgment on the enjoy-ability of a product: such a thing is inherently subjective. Therefore, I find it necessary for you to read and understand what I take a natural liking to and how that might affect my rating of a product.

    My ideal sound signature would be an extended sub-bass with a leveled, but textured, mid-bass. The mids should be slightly less pronounced than the treble, but still ahead of the bass. I prefer a more bright upper range.

    Source: The A15 Pro was powered like so:

    HTC U11 -> USB-C adapter -> earphones


    Hidizs AP100 3.5mm out -> FiiO A5 3.5mm out -> earphones


    HiFiMAN SuperMini -> earphones


    PC optical out -> HiFiMe SPDIF 9018 Sabre DAC 3.5mm out -> earphones

    All music was served as MP3 @320Kbps or as FLAC.

    Sound Signature
    Initial Impressions:

    I did not like the A15 Pro on first listen. I found it to be boring and uneven, much in the way I initially disliked the Kinera H3. But as the story goes, I grew to really like it. Rather than the tradition V-shaped sound signature I’ve come to expect from Chi-Fi or the warm-yet-competent sound signature of the original A15, I found myself confronted with a gentle U-shaped sound signature with a mellow bass, slightly elevated treble, and mildly emphasized vocal range.

    Treble: Songs used: In One Ear, Midnight City, Outlands, Satisfy

    The treble is unremarkable but in a good way. I mean to say that rather than always being in your face (despite the fact that it is indeed the most emphasized part of the sound signature) it just melts into the song. It is precise, well-weighted, and of a good timbre.

    I found myself absolutely captivated by the upper end of acoustic guitars and drums. A particularly remarkable display was Rise Above This by Seether. There’s a lot going on in the upper register, and the A15 Pro doesn’t have any problem dealing with everything; from the two guitars to the generous use of the drummer’s high-hats, it didn’t even flinch.

    Unfortunately, the A15 Pro does exhibit some mild sibilance on poorly mastered tracks, and Satisfy did sound harsh and uninviting.

    Mids: Songs used: Flagpole Sitta, Jacked Up, I Am The Highway, Dreams

    Interestingly, the A15 Pro opted to abandon any sort of neutrality in the mids. The upper mids are bumpy with peaks here and there. The vocals are notably boosted, providing them with a good amount of clarity and separation. The lower mids and mellowed out giving the Pro a light and airy feeling.

    The rhythm guitar in Flagpole Sitta was clear and distinct for the duration of the song, and the drums kicked with precision and purpose. But due to the mastering style of the song, it did come off as too clinical during some parts of the chorus.

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

    Bass was clearly tuned for the likes of Moth — clarity takes precedence over emphasis. And this philosophy is liked the reason Whizzer gave this IEM the “Pro” moniker, marketing advantages aside.

    Gold Dust did suffer a bit from the more “professional” tuning that Whizzer opted for. While the bass is absolutely present and audible, it doesn’t have the weight behind it to really move me.

    Fortunately, it’s not all bad news, the A15 Pro has notable levels of extension. It’s just stingy with how much bass it is willing to give you at any given moment. In For The Kill highlights this behavior; it manipulates the cascading bass line with no effort at all, but rarely ever lets it get aggressive enough to cause rumble or the sensation of impact.

    Packaging / Unboxing
    Thankfully Whizzer went with a more sensible amount of packaging with the A15 Pro. Instead of a copious amount of thin plastic buffers and cheap cardboard they went with a solid cardboard exterior with a foam interior, a move I wholeheartedly support. This is more size-effective and better protects the IEM during transport.

    Construction Quality

    One thing I’ve never worried about with Whizzer products is how well they are put together. Just like with the original A15 the A15 Pro uses a 3-piece metal construction for the driver housing. The nozzle is of a medium length and has a well-sized lip. Whizzer also uses a very competent grill covering the nozzle, protecting the interior from any debris.

    The A15 Pro features detachable cables following the MMCX standard. The included cable pairs decently well with the A15 Pro but has a hard time preventing any rotation.

    The cable is interesting. It sports a primarily black/gold color scheme and is covered in cloth below the Y-splitter and plastic above. It also features a chin slider.

    The cloth covering is tasteful, comfortable, and durable. I found no weaknesses in it during stress testing. The plastic is another story though. There are actually two kinds of plastic in the upper part of the cable: the black rubbery kind and the thin gray sleeving of the ear-guides. The black plastic is fine, if not a little thin. The gray plastic, however, kinks easily. In fact, it was kinked and malformed just by being packed into the original packaging, something I’m not too thrilled about. You can see what I’m talking about if you look closely at my pictures.

    Kinks aside, the ear-guides are actually very well constructed. Rather than use the standard wire-guided memory wire that is so often found these days, Whizzer did something I’d actually never seen before: they used a long spring to provide actuation and body. I’m not sure how much this contributes to the functionality of the memory wire, but whatever Whizzer did worked really well. They are malleable and have just enough body to keep everything comfortably in place.


    The A15 Pro is very comfortable, more so than the original A15. This is likely due to its reduced weight. During my extended listening sessions, I often found that the A15 “dissapeared” while I was using it.

    With my ears, the Pro’s shallow fit necessitated that I use the included foam eartips, which worked quite well.

    Whizzer never skimps out on accessories and shows you what its got in a very classy way. Inside the box you’ll find:

    • 1x semi-hard carrying case
    • 1x cleaning tool
    • 2x sets of foam eartips
    • 6x sets of silicone eartips
    The case is spacious and can accommodate the IEM without any issues. You can also get away with storing some extra eartips and the cleaning tool as well.

    The A15 Pro sends a clear message: Whizzer is done with their warm sound signatures. As disappointing for me as that is, I’m glad to see that they replaced it with something else that is quite competent. For lovers of accuracy and precision, the A15 Pro is for you. It’s solid construction and detail-oriented sound signature means that it really does sound “professional”. Is it a studio monitor? Well, no it’s not. But its as close as you’re going to get while still having a fun-sounding IEM for $125.

    In case you can't see my images, find them below:
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