Knowledge Zenith (KZ) X Crinacle CRN/ZEX PRO

Okay, I guess I’m the last very rare non-paid voluntary headphoneous spremus to leave a note for this.

I hereby would like to put a RIP word and tomb markers:

Nah…Just don’t waste your money,
Rest In Peace.
ZEX Pro , CRN 2022-2022

You know Crinacle is not a particular fan of KZ, and it was a bit of a surprise that Crin even accepted that offer. I was curious to see how that water and oil would blend, so I bought both ZEX Pro and CRN.
And this is my last KZ purchase it may become.

Crin x KZ chemistry doesn’t work on this planet Earth.

For $20 you‘d better off on Moondrop Chu / tripowin lea / 7Hz zero. This new magnetostatic tech is simply premature.

-Can’t believe this is tuned by Crin, usually it goes with pretty high standard “oh ok, great“
-Driver spec is sub-par, I can understand if it is a $6USD EDX, basically it’s EDX with little buzzer added
-Sound is incoherent and unnatural. As if you added too many layers of acoustic damper filters

What else to say? I’ve wasted my money. That’s it. No other words.

KZ, keep your own tuning, Use a IEC60318-4 coupler, and looking forward for your ZAS’s successor.

(This review was previously posted in my main review page, Goji-Fi on Facebook. Thanks!)

Greetings!

This IEM marks the debut of this audio review page, Goji-Fi! KZ Official Store 's KZ CRN is a hell of a way to kick off a series of proper reviews of IEMs that I have here in my possession and those I have yet to acquire.

Every review here in Goji-Fi will be split into 3 parts for maximum simplicity:
- Packaging (Presentation, Product, and Particulars)
- Build Quality
- Sound (Signature and Soundstage)
In Godzilla fashion, each part will be graded by Atomic Breaths (). Grading scale will be from 1-5 Atomic Breaths, following the typical 5-point numerical grading system (1-Poor, 2-Below Average, 3-Average/Acceptable, 4-Good, 5-Excellent).

As a bonus, I will be providing a 𝘎𝘖𝘑𝘐-𝘈𝘗𝘗𝘙𝘖𝘝𝘌𝘋 𝘗𝘈𝘙𝘈𝘔𝘌𝘛𝘙𝘐𝘊 𝘌𝘘 𝘚𝘌𝘛𝘛𝘐𝘕𝘎𝘚 that are either recommended by the community and/or home-brewed by myself. Home-brew EQ settings are of my personal and subjective taste, playing by both the strengths and weaknesses of the IEM. These will respect the original sound signature and sonic vision of the IEM.

Let's start!


𝙋𝙖𝙘𝙠𝙖𝙜𝙞𝙣𝙜
- Presentation
The box is of typical Knowledge Zenith fashion and dimensions. It comes with a minimalist white box KZ is known for, with some excemptions: KZ and Crinacle's logo are present in the top left corner, the full picture of the IEM on the center (a departure from the silhouetted presentation of the IEM inside), and the text "KZ x Crinacle CRN" highlighted. Technical specs are found at the back, more logos and information are seen at the sides.


- Product
Once the slide-on paperback cover is removed, we are presented with the KZ CRN on full view. It is still denoted as the ZEX Pro, as it is technically the same IEM. It is protected by a thin acrylic plastic, which has a small notch for convenience of unboxing.



- Particulars
A small baggie of eartips (S & L) are included, with the M sized tips already installed in the KZ CRN. Next, a white tapered cable is included, which is a departure from the past braided style cables KZ used to provide with their IEMs. Its equipped with the new KZ standard QDC ends, which promises increased protection of the 2-pin connection and a more snug fit to the IEM.

𝘽𝙪𝙞𝙡𝙙 𝙌𝙪𝙖𝙡𝙞𝙩𝙮 & 𝘾𝙤𝙢𝙛𝙤𝙧𝙩

The build quality for this IEM is fantastic considering its price. It feels hefty and valuable, without it being too weighty for it to be uncomfortable to be used as an IEM. The faceplate is made of metal, with an option for a black or rose gold paint scheme. This gives the IEM most of its heft and durability, although there have been reports of paint chipping occuring after months of usage. KZ should address this situation through better methods of painting their metal faceplates, as it can be a caveat for those looking for long-term stylish IEMs. The back of the IEM is made from a medical grade resin material, that of which makes sure that skin irritation is kept to the minimum. The included cable is an upgrade from the previous bronze/brown-ish braided cable KZ used to include in their IEMs, which usually tangled LIKE HELL for me. This one almost never tangled for me, and it provides a proper complement to the heft of the IEM itself. The eartips are well, the standard KZ Starline eartips, only in a new color. I won't speak for it as they're honestly crappy for me, I would recommend to use other tips you have in your inventory.
KZ has allegedly analysed thousands of ear shape samples to create the shell of the KZ CRN, and it shows. Comfort in my ears is superb, the protruded fins properly secures the IEM on the inside. However, this can be a caveat for those with smaller and/or peculiarly shaped ears, as it can definitely cause pressure when fit is not shaped for said ear types. I can confidently say that I can wear this IEM for hours on end, but I can't speak for those who unfortunately cannot.

𝙎𝙤𝙪𝙣𝙙
𝘔𝘜𝘚𝘐𝘊 𝘜𝘚𝘌𝘋 𝘍𝘖𝘙 𝘛𝘌𝘚𝘛𝘐𝘕𝘎:
𝘔𝘦𝘵𝘢𝘭𝘭𝘪𝘤𝘢 - 𝘞𝘩𝘦𝘳𝘦𝘷𝘦𝘳 𝘐 𝘔𝘢𝘺 𝘙𝘰𝘢𝘮
𝘋𝘦𝘢𝘵𝘩 - 𝘚𝘱𝘪𝘳𝘪𝘵 𝘊𝘳𝘶𝘴𝘩𝘦𝘳
𝘊𝘰𝘢𝘭 𝘊𝘩𝘢𝘮𝘣𝘦𝘳 - 𝘓𝘰𝘤𝘰
𝘚𝘭𝘦𝘦𝘱 - 𝘚𝘰𝘯𝘪𝘤 𝘛𝘪𝘵𝘢𝘯
𝘖𝘮 - 𝘑𝘦𝘳𝘶𝘴𝘢𝘭𝘦𝘮
𝘌𝘢𝘳𝘵𝘩, 𝘞𝘪𝘯𝘥, 𝘢𝘯𝘥 𝘍𝘪𝘳𝘦 - 𝘓𝘦𝘵'𝘴 𝘎𝘳𝘰𝘰𝘷𝘦
𝘋𝘶𝘢 𝘓𝘪𝘱𝘢 - 𝘋𝘰𝘯'𝘵 𝘚𝘵𝘢𝘳𝘵 𝘕𝘰𝘸
𝘔𝘪𝘤𝘩𝘢𝘦𝘭 𝘑𝘢𝘤𝘬𝘴𝘰𝘯 - 𝘋𝘢𝘯𝘨𝘦𝘳𝘰𝘶𝘴


- Signature
Surgically-precise. These words are what describes Crin's tuning for these IEMs. Every song comes through as very clean in presentation, but not too clean that it sounds sparkly clean. Everything is laid down in equal proportions, like a Mama and Papa Bear serving the proper portions of porridge for their cubs.
The low bass extension that Crinacle put into these provides a little bit of spice and identity to the surgical nature of these IEMs. Despite the rumbling low bass features, bassheads might be a underwhelmed by the lack of the mid-bass thump that they crave.
KZ's in-house sound signature that scoops the mids for more bass and treble are definitely NOT present here, as mids are clear as day. This gives the bulk of the IEM's body, as the non-recessed mids gives that oh-so meaty mids that I personally love. I personally love stoner metal music; the luscious layering of guitars are felt and heard, oozing out like a juice from a freshly-barbecued steak.
With all the praise I am giving, we come to the point wherein problems start for this IEM: the treble region. Its infamous 8K peak is currently doing its rounds around the community, making it a point of contention whether to buy the IEM or not. I kid you not, I CAN definitely hear this peak. Sibillance is immediately heard because of this peak, which can hurt treble-sensitive ears. It gives off a weird tonal imbalance to the otherwise-surgical approach of this IEM, making it sound metallic and cold. Maybe KZ and Crin were thinking of surgical knives when they tuned this one, hehe. If you're asking if this peak is enough to be warranted as a dealbreaker, fear not, it isn't. Its a weird feeling, as if its MEANT to be there to peculiarly compliment the neutral tuning they were trying to achieve with this one. After a period of adjustment and *supposedly* Crinacle-approved EQ fixes, the sound signature becomes a wonder to behold in the Chi-Fi budget range.
- Soundstage
KZ's limitations are also seen in this one. Those who are expecting an expansive sound will be disappointed. The soundstage is in-face and intimate, which compliments the straightforward, no-shrills presentation of the KZ CRN. Resolution is OK, which is expected at the price range. Imaging is average, as if it feels like there are two separate stereo images for each ear, with a recessed presence on the front. Drum tom rolls sound strong from the left, lose its volume in the front, then come back out strong on the right. I've had better imaging from other IEMs on this price range.

VERDICT:

Presentation:
Build & Comfort:
Sound:

GOJI-APPROVED PARAMETRIC EQ SETTINGS: (Community Recommended)

+5db at 150 (4.0Q) - Low Shelf
-5db at 8k (5.0Q) - Peak
+10db at 12k (4.0Q) - Peak

KZxCRN (ZEX PRO CRINNACLE) REVIEW

TONE: 8.5/10
TECHNICALITIES: 7.5/10
BUILD: 8.5/10
SOUND BENEFIT: 8.8/10


Well, let's start this review by pointing out that I'm far, very far from being a fan of both KZ and the golden-eared pseudo-polemicist Crinnacle. But I'm curious and when I see a sound response graph that looks quite promising, I have to test these IEMs. As well, when it come to audio i’m unbiased and would never smear a product because it’s created or tuned by somebody i’m not afound off.

The fact that these KZ ZEX PRO CRNs had a very positive reception does not influence me in any way, let's say that this phenomenon of disproportionate euphoria is quite common with low budget intras, and rarely valid because in the end it is the tone that is appreciated. And this tone, making it beautifully cohesive is not easy for hybrid type intras, especially in low prices where the compromise is mainly in terms of technicality, but also often sound timbres and durability of the product.

SOUND IMPRESSIONS

So how is this TONE?

Well balanced, organic, natural, warm overall. We are almost in neutral territory (not flat), almost because the balance is curved in a U with a deep bass boost. Crin is a fanatic of the Harman curve and here he draws inspiration from it again and again. Already the Harman invasion is obvious in Moondrop and Tanchjim, I still fear that the Chifi will jump right into this tonal standard. Still, for KZ, it's an amazing sound paradigm shift, first their IEMs usually sound sharp and aggressive, often in a sharp sawtooth W signature with overboosted bass and highs.
Here with the CRN, we are in warm, soft, comfortable and this is the first time that I use the term "natural" to describe a KZ signature. For a tribrid includkng an exotic est transducter, the CRN are very cohesive as a whole even if critical hearing can find some slight timbre difference, especially in highs vs low and mids region.

But, and this is a big BUT, the technicalities leave something to be desired and reflect their price range. The resolution is OK in its macrodefinition, but less so in its micro definition. The dynamics are not very nuanced and realistic in amplitude difference and therefore can seem muffled on impact, also lacking natural resonance and cleanliness between notes. The control of the attack, without being disastrous, is not very agile and fast.

The BASS has a heavy hit, a meaty slam focused on deep bass weight, it's quite slow and slobbery with abstract definition. Physicality is put forward and benefits from pop, R&B, soul, Rap music styles that do not use acoustic drums. Yeah, the kick drum seems a bit out of the way, lacks texture and room to resonate naturally, the toms sound digital too. The basslines will swallow the kick drum at times, the extension isn't linear, again, it's a fluffy impact that commands attention. It sounds a bit like a car subwoofer, only warmer and more organic. Oomph. Not recommended for rock, metal, fast jazz, but it passes for the classic.

The MIDS are very good, surprisingly natural in their tone. Soft with a forward presence, not super chunky but not too thin either. Piano, violin and especially vocals sound realistic while being softened in defining contours. So, no invasive sibilance for a KZ! There is something to celebrate! I really appreciate the female vocals, they are round and fuller than the male ones, there is warmth and the presence is wide open and therefore very enveloping. Even if the bass slips a little on the lower midrange, it's done in a romantic way, it embraces instead of veiling the front, in fact, it's the bottom that it affects, it lacks darkness, air and cleanliness. In any case, mediums of this quality for $25 is a big plus even if it's not super sophisticated in terms of overall resolution when there are a lot of instruments and speed.

The TREBLE is well calibrated with the rest of spectrum, there is a little boost in the 8khz region which helps to extract some detail and also a bit of abrasiveness for the acoustic guitar attack. It's nothing extraordinary, and not very revealing of micro-details, nor richness of textures. It's not airy or shiny highs and it lacks post-impact resonance. We easily forget these highs to focus on the bass and midrange. But are we listening to a KZ intras? It doesn't bite! It's docile! Far from being brutal...oh, but yes, this lack of precision, clear definition, space in separation...it's really KZ here. In short, muffled highs, smoothed with a filter to hide its imperfections and risks of sibilance, which as I said are not invasive but not creamy for all that. Hum, but the low end of the treble spectrum is subdued, the grip of the attack lacks incision for more energetic instruments like the electric guitar and viola, the harpsichord also sounds too flat and dry. SPATIALITY is all in breadth, and sorely lacking in depth. It's a wall of sound curved around the head, there's worse in this price. The instrumental separation is more problematic, it's messy and homogeneous, good luck getting a good idea of the positioning of the instruments...with ultra simplistic music it's ok, for everything else it breaks and can become chaotically indefinite.

CONSTRUCTION:

Very potable for the price. Thick but basic plastic shell, with an organic shape that slides well in the ear. Metal plate on the back, quite aesthetic….but we hope that will not take off on the first day of humid heat. AND the cable….arg. We always complain about the cables chifi why? I mean, it doesn't include basic $300 IEMs like the Final B2s. But looks don't mean anything. Looking closely at the silver plated cable, it appears to have very few wires in its single gauge. In short, it's crap and negatively affects the rendering by drying out the timbre and attenuating the impact and presence of the bass, which opens up the sound a little artificially.

COMPARISONS

VS KZ ZS10 PRO

Wow effect or sound shock is up to you, but the ZS10PRO are really more muscular, energetic and analytical, especially in the lows and highs. The mediums being further back than the CRIN. The basses are bouffier and runnier, the sub basses are less fleshy and defined and hollow less deep. The cohesion of the tone is less natural, the sound timbre drier and grainier, the highs more shrill and unbalanced. The CRINs are clearly more refined, less artificial in their rendering, rounder and fuller in the mids, offering vocals without sibilance unlike the ZS10PRO. On the other hand, the sound imagery is more vivid and revealing with the ZS10PRO, apart from the bass which is less well separated. There is more sound information with the PROs but it saturates the soundstage, sometimes overwhelming the mids, and the energy concentrating in the high sound spectrum sometimes reaches the limit of sustainability. In the end, even if the CRIN do not put forward their technicalities in a brutal way like the ZS10PRO, their softer and balanced tone is highly more coherent, organic and musical than the PRO.


VS TANCHJIM TANYA

Now, the tone follows a Harman target type balance very similar to the CRIN, but without a boost in the sub bass, so less L shape in the final rendering. The sound timbre is richer in texture nuances, more natural and less organic. The basses descend less deeply, but have a more defined and assertive strike, less soft than the CRIN. The mediums are clearer and put forward with the CRIN, the presence of the vocals is wider and more transparent. The Tanya are more V shaped, less neutral and more fleshy overall. The falling of notes has more weight, for example for the piano. Note that the Tanya are much more difficult to amplify correctly, which can affect the rendering of their dynamics. This is not the case for CRINs which are easy to feed. As for the highs, the Tanya are better balanced, flatter, rounder in their rendering and less colored, the CRIN having a boost allowing to extract the details, especially the percussions, this boost is not overrated but remains noticeable and sometimes affects the instrumental harmony, which remains more natural with the Tanya. In the end, the CRIN seems to offer a higher sound benefit than the Tanya due to a nice balance between technicality and tonality, the Tanya certainly having a more pleasant, full and natural sound timbre, but a more clumsy and dark rendering.

CONCLUSION

The KZxCRN represents an exception in the KZ line in terms of tuning refinement, but remains mediocre in terms of what appeals to their technicalities, which are comparable or even lower than other KZ IEMs under the $50 mark. Still, their balanced sound without aggressiveness in the treble is candy for the ears. It's soft and sweet as you wish, with a particular talent for beautifully extracting female and male vocals. For a Hybrid earphones, the cohesion of the transducers is almost perfect, which is a tour de force in itself.
Easy to love, but less easy to forget as a KZ product, the CRNs have a very accessible sound for lovers of pop music focused on bass and vocals of all genres, for fast or scholarly music, it will be necessary to climb in the price brackets to benefit from more talented technical skills.

If your out of money and wonder how a cheaper Seeaudio Yume might sound, this is your chance to try the first Harman tuned KZ earphones, and to be fully honnest, it worth it since I consider these IEM as the best KZ offering yet.



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For more honnest, unbiased and critical audio review give a read (and subscribe?) here:
https://nobsaudiophile.com/

Introduction​

If you’re here then you were informed about the hype that surrounded the ZEX PRO/CRN in the last month.
Since when Crinacle stated the ZEX PRO was tuned by him, many people started flooding the shops with lots of orders, driven by curiosity.
I was honestly curious to try these, but I have been waiting for this moment and in the meantime I’ve had the time to look around and read what other people were saying about these. This is actually one of the few times I look at the reviews before something gets delivered, and considering what people were saying I was expecting something really great.
So, straight to the point: are the ZEX PRO/CRN meeting my expectations or are they overhyped by the masses?

Disclaimer: the sample was provided by KZTWS for free in order to write a honest review. I do not represent them in any way and this is not a promotional content.
At the time of the review, the KZ ZEX PRO/CRN were sold for around €30 on kztws.com.

For more reviews, visit us at: https://www.audio-monkeys.com

Technical Specifications​

• Configuration → Tribrid: 1DD + 1BA + 1 Magnetostatic unit
• Sensitivity → 104dB
• Impedance → 25 Ohm
• Frequency Response → 20 Hz – 40000 Hz
• Cable → 1,20m silver-plated copper cable with 0,75mm PINs, my sample has no microphone but there is an option to have the cable with microphone
• Connector type → L-type gold plated 3,5mm jack connector

Packaging​

Very simple and basic KZ package containing:

• The KZ ZEX PRO/CRN
• The cable
• 3 pairs of silicone starline tips
• User manual

Design and Build Quality​

The KZ ZEX PRO/CRN has an aluminum matte faceplate with KZ logo while the overall shell is made by plastic. There’s the Crinacle logo on the side which many have liked (not something really worth the attention as I care more about the sound quality but it’s a nice add if you’re a Crinacle follower/fan). The build quality is solid for the price and although it’s not a super robust metal shell, it’s still something that seems built to last.

Cable​

The stock cable is the same included with the CCA NRA. Better than old KZ cables but nothing special, again no chin slider on it.

Comfort and Isolation​

The ZEX PRO/CRN aren’t the most comfortable KZ I’ve tried: the protruding upper edge hurts me a bit after some time, and I can say it’s pretty hard to keep them in the ears (at least for me) for more than 1 hour.
Isolation is good, nothing to be surprised of.

Sound​

How do these sound?
This is the real reason you’re reading this review (I guess).
[Personal preferences: I listen to almost every genre, even though my main preference goes to EDM subgenres. I always like a bit more energy on the bass and on the highs, leading to a personal preference for Y-shaped sound signatures, but if I have to choose, I’d prefer having many different IEMs with various signatures, in order to choose a particular one of them when I want to listen to a specific genre. I love switching between my IEMs so it’s even better if they’re very different from each others.]

TEST GEAR

• DAC: Topping E30
• AMP: Topping L30
• Mobile phones: Poco F2 Pro, Samsung Galaxy S7 Edge
• Portable DAPs: Benjie S8/AGPTEK M30B
• Other sources: Presonus AudioBox iONE

Do they need an amp?
The ZEX PRO/CRN don’t need an amp and play consistently if used with your day-to-day smartphone without issues. They scale a bit when amplified but results aren’t game-changing.

Sound signature
The KZ ZEX PRO/CRN are an almost neutral set with elevated sub-bass (and a slightly annoying 8kHz treble peak).

Lows: sub-bass is elevated and has average extension, but it’s clean and not just a rumbling “oomph” like on other sets. Bass is pretty good, I’d say I like the overall cleanness and maturity of the bass although sometimes I would like it to have more “body”. At least we’re not again in front of another super-boomy bass and I am pretty happy with that, moreover considering that the ZEX PRO/CRN are not made for bassheads and that it isn’t bleeding into the midrange.

Mids: the midrange isn’t as recessed as on other sets and I find it pretty lean and on point. Resolution is again nothing special but instruments are reproduced well with no particular tonality issues. Vocals aren’t the best out there but at least they’re more natural than on other sets, even though I would have liked thicker and warmer male vocals. The upper midrange is sometimes hot and I find the ZEX PRO/CRN to become harsh and sibilant at times.

Highs: treble has good details and although not very transparent the good thing is that Crinacle has demonstrated there’s no need to exaggerate the treble in order to get an acceptable of details even if using cheap drivers. One thing to note is that treble lacks some extension and air on top: I was expecting it considering Crinacle usually prefers more relaxed stuff (or at least that’s what many of us understood by reading his reviews and rankings). The 8kHz treble peak may bother someone, but it’s something that can be easily fixed by subtracting 3 or 4 dBs through EQ (it personally does not bother me but I’m not sensitive to treble so I don’t find myself in the position to judge this peak).
I think that, because of this peak, the ZEX PRO/CRN sound best when used at lower volumes.

Soundstage is average with more width than depth and average height. I expected imaging and instrument separation to be pretty good but in fact they’re not in line with products that compete in this price range.
One thing to note is that the ZEX PRO/CRN are NOT forgiving, so don’t use poorly mastered tracks or albums or everything will sound messy.

Some comparisons:
ZEX PRO/CRN vs CCA CRA
Very different sounding stuff here: the CRA are bright with great treble extension but also have a less refined tuning, while the ZEX PRO/CRN goes “all-in” for the tuning by sacrificing the upper-end extension.
I’d say immediately that there’s no winner here: technicalities are similar (apart from imaging which is better on the ZEX PRO/CRN) and resolution is comparable (the CRA are slightly less harsh thus seeming cleaner sometimes but they are also brighter and more fatiguing for long sessions).
Sub-bass is more boosted on the ZEX PRO/CRN, bass is more textured on the CRN while it’s more boosted on the CRA; the midrange is more recessed on the CRA and the biggest difference can be located from the upper midrange to the upper treble: the ZEX PRO/CRN is slightly hotter in the upper midrange and can become a tad sibilant some times, but they’re also less fatiguing over time due to the relaxed upper treble; the CRA have a more extended upper treble that leads to an airier presentation and slightly more details, and the treble extension is very very good for the price range.
The CRA win hands down when it comes to comfort., while isolation is better with the ZEX PRO/CRN, which also have a better stock cable..
What to buy? They are very different. If you want a “different” than usual tuning, the ZEX PRO/CRN offer a more refined sound profile thus being the better choice, whereas you should get the CRA if you want a more comfortable product with more treble and details and a brighter presentation.

ZEX PRO/CRN vs CCA NRA
The ZEX PRO/CRN again vs one of the sister company’s products.
These two share similar technicalities although the CRA have a brighter approach and slightly better treble presentation.
Sub-bass is more prominent on the ZEX PRO/CRN that also have better bass. The NRA have more details and more coherence along the spectrum with no particular peaks, but they are also brighter and more fatiguing for long listening sessions. In some tracks, I find the NRA to reproduce vocals in a more natural way, and probably this is due to the fact that the ZEX PRO/CRN 8kHz treble peak, along with a very lean presentation, lead to a less enjoyable and warm vocal reproduction (moreover regarding male vocals).
Soundstage is similar although the ZEX PRO/CRN sound more intimate with slightly better depth, whereas the NRA play in a wider stage. Imaging is slightly better on the NRA whereas instrument separation is comparable.
Comfort-wise, the NRA are the winners, while isolation is slightly better with the ZEX PRO/CRN in my ears. Cable is identical.
What would I pick? Same answer that I have already given in the previous comparison. These are very different products and you should decide: if you want a brighter and slightly more detailed presentation, then the NRA are the ones to go with, whereas if you want a more unique signature in this price range, with a leaner and neutral approach, the ZEX PRO/CRN will give you that type of sound reproduction with no particular excellence along the spectrum.

Final Thoughts​

The ZEX PRO/CRN aren’t as surprising as I was expecting them to be, probably because many people have painted an exaggerated image of them.
They are actually unique in their price range, and I cannot think of anything similar or comparable, so if you know what you’re buying then they are a safe choice.
On the other side, if you’re new to the Chi-Fi game, I would advise you to understand what you want before getting into something like this as the signature offered by the ZEX PRO/CRN is not for everyone and will not be enjoyable by the majority of people out there (who usually prefer more bass and treble).
One thing to say is that Crinacle has done a good job tuning these, but some refinements are needed, such as the 8kHz treble peak and the sibilance and harshness that can come up (moreover when increasing the volume). Technicalities are not on par with some competitors in the same price range, but Crinacle himself said that he was aiming for a good tuning: in fact the ZEX PRO/CRN came up with a good tuning, so the goal was definitely achieved.

INTRODUCTION
Note: I've bought the ZEX pro out of curiosity with my own money, I did not get it for free, and it is also not a sponsored review.

I am not exactly into KZ products and this is only my third KZ IEM, I do not use any KZ IEM as my daily driver as well. As for my musical tastes, I listen to classical, rock, pop, electronic.

For this review, I put on the ZEX PRO like I would with any pair of IEMs. Did not test them in a particular fashion to keep the review as neutral as possible.

These are my opinion of how it fared.

Ratings

LOWS - 3.5/5
Sub-bass and bass are nicely elevated here. The amount of rumble is just right and when the track calls for it. The lows here are pretty decent and offer just the right amount, and they do not bleed to the mids.

MIDS - 2.5/5
Mids are only so slightly recessed. Mid-bass sounds thin but the upper mids are doing okay, there is really nothing to shout about. At times, vocals can sound sibilant.

TREBLE - 1.5/5
Here is where things go wrong, it can get harsh and fatiguing because of the 8K peak and the sound coming out of these isn't very natural, it kind of spoils the entire audio if I were, to be frank. I see how this has been elevated for the listener to perceive more detail and clarity, but it has not been done well and sounds unnatural.

SPEED - 3.5/5
Speed is pretty decent as you would expect from a triple hybrid IEM with BA drivers.

SOUNDSTAGE AND IMAGING - 3/5
Soundstage is average and I would have expected better imaging, imaging suffers slightly especially on modern music and the busier tracks.

Click to expand...

Conclusion
The ZEX pro is far from perfect and is only average at best; that is nothing surprising for IEMs at this price. For the price point, whether it's worth, depends on your preferences and the tracks you listen to.

As hyped as it currently is, do not expect this IEM to perform at the level of sub $100-$200 IEMS; it clearly does not.

I am confused about the target audience this pair of IEM is intended for, as far as it has a somewhat neutral tuning, given the flaws, it would still be hard to recommend.

INTRODUCTION:



I first heard heard of Knowledge Zenith or in short KZ from my fellow musicians from church. They are one of the companies that provided decent sounding IEMs for very affordable price range. The brand made a big impact on the community of musicians here in Philippines and almost everybody in my circle, have this as their go-to IEM for studying our roles in a band.



DISCLAIMER:



I would like to thank Jeff Yang again for providing this unit in exchange of an honest review. I do hope that what I say here, will help the company in their upcoming products. If there is one thing I can say for KZ, is they are doing right by listening and taking notes from their consumers.



My opinions here are completely my own. I am NOT in any way influenced of any form of incentive. This is purely my honest, subjective impressions and experience with the gear on hand. I cannot stress more that you should take this as a grain of salt for we have different perception to sound and what we hear. I always try my best to stick with the stock accessories that comes with the gear by default. You are free to try other methods such as tip rolling or cable rolling. Below are worth noting before concluding on what I say here:

• DAP (digital audio player, be it phone, laptop, mobile, or stationary setup)
• DAC or dongle or any external amp
• Tips
• Cables
• Source of audio file be it offline FLACS or streaming service like Deezer, Apple music, Tidal, Qobuz, Spotify and the likes..

My reviews are more on how music sound on our ears. The technical stuff like frequency graphs and the physics behind the tech and drivers used, I leave to other reviewers.



SPECIFICATIONS:



Configuration: 1x dynamic driver, 1x magnetostatic, 1x balanced armature
Impedance: 16ohms
Sensitivity: 104db
Freq response: 20hz-40khz



PACKAGING:

Packaging is still the same KZ we all have grown familiar with. And basic inclusions. I can’t complain here for its price point. But a part of me wishes for something new on future releases.



The package is identical to its predecessor the ZEX.



The packaging includes the following:

• IEM itself the ZEX pro
• A white cable. 4 core SPC with 3.5mm configuration
• Ear tips, 3 pairs in S,M,L sizes
• A quality control card
• User guide or manual

PHYSICAL ATTRIBUTES:



ZEX pro is lighter than the original ZEX. Ditching the magnesium alloy material, still the ZEX pro seems sturdy and well built. Of course, extra care would not hurt. Feels nice to wear, still maintaining a very decent fit and seal. I got the rose gold colorway for I intended this unit for my wife. She is also in the music business, a singer, and having this colorway for her would be suiting.



Cable terminal on the shells, yet again, is a QDC 2 pin. A minor con for me, and for those who plans to cable roll, this might be an issue.



Moving on to how it sounds..





LOWS:



Bass or lows, are nicely elevated here. I must say, I did not sense a night and day difference here compared to the original ZEX. Controlled, punchy and decays quickly. Rumble is available if the track calls for it. Rage against the Machine drum kicks, gave me authoritative presentation which I quite liked. And my classic tracks like Earth, wind and Fire gave a balanced reproduction even though elevation is present here.



Conclusively, lows here are very admirable. Not bass head level kind of lows though. Just the right elevation to give you enjoyable listening experience.



MIDS:



Mids here again are recessed. Since ZEX pro was added a balanced armature driver, I was kind of expecting an improvement in the mids by a considerable margin but, it did not. At least for my ears. Yet, mids are not to be hated here. Instruments like guitars, pianos, synths, organs, Rhodes are still nicely presented. Fleetwood Mac’s guitars, still are very admirable and has good placement and not deprived of texture.



Vocals on the other hand, has a very noticeable relaxed nature compare to my lushful mid IEMs namely BQEYZ Autumn and TFORCE Yuan Li.



Conclusively, mids here are not far off from the original ZEX. If there is an improvement, it is by a minimal margin.



TREBLES:



Now trebles… here is the part that I think needs more improvement. A small percent like 20% of my tracks and playlist, I would encounter some peakiness. Cymbal strikes can be piercing at times especially on brightly mastered tracks. Yet again, the other 80% still gives me a sibilance free experience.



Conclusively, trebles here have that sparkle and openness. It has the right amount of energy on top which still not deprived of micro/macro details.



FIT & ISOLATION



Fitting is very adequate here. Very comfortable to wear and not fatiguing even for long hours of listening. As of the moment, I think I’m on the 3rd hour of listening and no pain yet.



Isolation is average and somewhat I can hear outside noise. Even as we speak, listening at 50% volume, I can hear slightly hear the fan blowing on my face. Which I think is very safe if you listen to your music on the go, while walking. At least it makes you aware of your surroundings.

SOUNDSTAGE AND IMAGING:



Ok.. here is the part that I think needs improvement too. Nothing spectacular to note here. Stage has width, depth and least of height. It gives you a sense of a small home recording studio.



Imaging on the other is above average. Tracks from Balmorhea and Clever Girl, all instrumental tracks, have a nice positioning of instruments. Not the best in town, but it is there, noticeable.



I would like to add a note to scaling. I have noticed that listening to ZEX pro on high volume or high gain if your audio player has one, adds a noticeable elevation on the trebles. Making ZEX pro much prone to sibilance and peakiness.





SOURCES AND GEARS:

• LG V30 hifi dac (high impedance mode)
• Hiby Music player
• UAPP app (USB Audio Player Pro)
• Tidal Masters subscription
• And some offline FLACS

For this review, I have added a dedicated DAP for the main purpose of auditioning and reviewing IEMs. I have added HIDIZS AP80pro. I must say, I have enjoyed ZEX pro more when I paired it with the AP80pro compare to my LG V30 quad dac phone. So feel free to explore good synergies with DAPs.



The AP80pro was mainly used for this review.



Here are some tracks I usually listen to when reviewing:



That’s the way of the World by EWF
Africa by TOTO
The Girl in the Other Room by Diana Kral
Balmorhea album All is wild, All is Silent
Sila by Sud
Smooth Escape by D’Sound
Never too Much by Luther Vandross
P.Y.T by Michael Jackson
Ain’t no Sunshine by Eva Cassidy
Shoot to Thrill by AC/DC
Another one bites the Dust by Queen
Good times bad times by Edie Brickell
Alice in Wonderland by Bill Evans
Ain’t it Fun by Paramore
Redefine by Incubus
Far Away by Nickelback
Lovesong by Adele
Lingus by Snarky Puppy
Harvest for the World by Vanessa Williams
Love Bites by Def Leppard
No Such Thing by John Mayer
As by Stevie Wonder
Whip Appeal by Babyface
Ain’t Nobody by Chaka Khan
Futures by Prep
Landslide by Fleetwood Mac
Every Summertime by NIKI
SADE tracks
AC/DC tracks
Queen tracks


And many more… I always listen to High resolution format, being the least quality 16bit/44khz FLACS be it offline or online.

VERDICT:



The ZEX pro yet again, delivers a sense of maturity compare to other models of KZ. Even though its u-shaped tuning, is not my personal preference, it did gave me an enjoyable experience and I would easily recommend it to anyone who leans to start in mature listening. Still aimed for the consumer market, the ZEX pro is by a small margin, better than its predecessor.



My only qualms here are the occasional piercing trebles, and a wish for better technicalities. Tonality wise, it did satisfy me 80% of the time. This review is done with a stock set up. Don’t let me stop you in experimenting ear tips, cables, dongles and DAPs. That I leave to you and other reviewers.



Conclusively, the ZEX pro is an enjoyable set, and for its price point, you are getting a tri-brid set up that is honestly, quite hard to beat. I am certain, that if KZ keeps this up, they would be back in the ball game amongst other chi-fi brands who are getting a lot of praises.

Disclaimer:
This unit has been provided to me by Concept Kart in exchange for my honest opinion. I am really thankful to Conceptkart.com for including me in this tour.
KZ ZEX PRO:
ZEX pro is a new offering by Kz. tuned by Crinacle. It is a triple hybrid IEM which consists of one magnatostatic driver, one BA driver and lastly a dynamic driver. With impedance of 24 ohms, it's sensitivity level is rated at 104 db, soo it can be easily driven by a phone, but really benefits with a good dac/dap.
Design and comfort:
The design of zexpro looks really appealing. It has aluminium faceplate with smooth matt finish and translucent resin shell that looks premium. It also seems quite durable. The IEM fits snugly, yet comfortably in my ears. Isolation is very good as well. The shape of its shell reminds me of BGVP DM7/DM6 design.
SOURCE:
I used M11 pro for testing this IEM. So my impressions are based on it.
SOUND: ZEX PRO is tuned by Crinacle. Measurements of 'Moondrop Blessing 2 Dusk' and 'Zex pro' are identical. Zex Pro has a U shaped sound signature with elevated sub-bass, neutral midrange and uplifted treble. There's a peak at 8k region and a sharp roll off from 8k to 13k region
BASS:
Bass is nicely done on this set. It is a maturely tuned bass, which is clean, fast, punchy and doesn't bleed into the mids. Overall it is very good for its price.
MIDS:
Mids are totally priceworthy. They are slightly recessed and a little lean for my taste. Though female vocal sounds good on this set, I would've loved slight more note weight in the mids.
TREBLE:
Treble is decent, but sometimes it gets fatiguing because of 8k peak. At times, it feels artificial which is not very appealing to me but this can be fixed easily with slight EQ.
SOUNDSTAGE:
Soundstage is nice and wide with average depth.
IMAGING:
Imaging and instrument separation is really good.
FINAL VERDICT:
ZEXPRO is a very capable IEM. Yes, there are some issues that can be fixed with slight EQ. By sliding down 8k to -5db and 12k to +10 you'll easily be able to fix tonality of this IEM. With this Eq settings, Zex Pro is a perfect all rounder and can easily compete with IEMs of double its price.

I try to write my reviews in a slightly different style and format. The goal is to reduce it to the most useful and necessary information, making reading and skimming the review easier and faster. We all sometimes lack time to read or watch in-depth reviews, so this review should offer an alternative.

You'll find more reviews in this style here on Head-Fi on my website Flightless Bird.



KZ has released their first tribrid with surprisingly decent tuning in cooperation with Crinacle. Is it finally KZ's great success or just too good to be true?

KZ has for quite some time now followed a principle of seemingly randomly release new IEMs and see which ones are good and get bought and which aren't. Their IEMs were usually tuned quite bass-heavy and lacking especially in Mids. So it was quite surprising to see a KZ that a lot of people wished for – a KZ IEM that's actually well tuned.



The second, newer name of the KZ ZEX Pro also hints at that defining aspect: KZ CRN, named after IEM-guru and newish YouTube star Crinacle, who tuned this IEM in cooperation with KZ. With the equally by "tuned-by-Crin"Moondrop Dusk being one of my favourite IEMs, my expectations are accordingly high for the tuning of the KZ ZEX Pro.

Frequency Response​

About the IEM​

• Beautiful design, especially in gold but body feels slightly cheap
• Adequate to good fit for me but starts to hurt a little after some time (1-2 hours) due to the "fin" pressing into the ear
• Barebones accessories, ok for price
• Cheap, plasticky and sticky cable

The accessories and cable are acceptable for the price, as are built quality. Comfort will vary highly from almost custom-fit to unbearable depending on your ears.

Sound Impressions​

• Best tuned KZ IEM so far
• Technicalities still one of the problems with low resolution and lacking details, especially in vocals and instruments in treble region
• Lacking clarity in vocals – especially female
• Bass with good control, some of the best from KZ (vs. DQ6)
• Great vocal and mid presence, on of the best KZ IEMs for vocals
• "The Greatest Show" by "Panic at the Disco" sounds amazing with the ZEX Pro, plays great with its strengths in bass and vocals
• Treble tends to be piercing and unpleasant due to the 8 kHz – and to a lower degree 4 kHz – peak
• "Almost Lover" by "A Fine Frenzy" is almost unlistenable due to these peaks
• Can to some extent be fixed with EQ (lower 4kHz and 8kHz by a few dbs)

One of the best tuned IEMs KZ has released so far, showing promise for future changes to their typical tuning. Especially the bad technicalities show the limits of the drivers KZ is currently using. 8kHz peak could be a dealbreaker for some.

Comparisons​

CCA NRA​

The CCA CRA was KZ' – respectively their sister company CCA's – first try with a magnetostatic driver. For a first inexpensive the NRA were quite alright, providing a test ground for the ZEX (Pro). You can read my CCA NRA review here.



Advantages KZ ZEX Pro/CRN:

• Better fit
• More balanced tuning
• Controlled bass
• More vocals presence
• Better technicalities (slightly)

Advantages CCA CRA:

• Less painful over time
• Treble less piercing, especially no 4kHz peak

The KZ ZEX Pro is clearly the way to go in this comparison. Apart from slightly less painful and better controlled treble, the ZEX Pro does everything better and more to my liking than the NRA. Its tuning as well as the technicalities are just plain better.

KZ DQ6​

The DQ6 has so far been one of my favorite KZ IEMs and is comparatively well tuned and has a similarly good design and fit. To be the best KZ IEM, the ZEX Pro has to beat the DQ6.



Advantages KZ ZEX Pro/CRN:

• Solid, balanced tuning
• Slighly clearer details, especially in vocals
• Wider Soundstage

Advantages KZ DQ6:

• Slightly better fit despite being almost the same design
• More and better, cleaner midbass
• More intimate vocals
• More coherent
• Slightly better cable

The ZEX Pro and DQ6 are both some of the best tuned and best sounding IEMs that KZ has come up with so far. Both also lack in technicalities, even with their price in mind. Which one to choose comes mostly down to preference and music library. The DQ6 excels with better midbass and treble.

Moondrop SSP​

The Moondrop SSP is another IEM at a similar price to the ZEX Pro that’s quite well tuned with good technicalities for its price. Another “benchmark” to beat at that price point.



Advantages KZ ZEX Pro/CRN:

• More and better subbass
• Slightly better fit and isolation
• Vocals are more present and harmonic

Advantages Moondrop SSP:

• Better technicalities, especially better resolution
• Treble more controlled, way less piercing peaks
• “Calmer” vocals

The SSP and ZEX Pro have quite different tunings, varying the most in their bass performance. While I like the tonality of the ZEX Pro more, the SSP excel with way better technicalities, especially with way crispier vocals.

Conclusion​

The ZEX Pro (or CRN) are well tuned. In fact, they’re the best tuned IEM from KZ I’ve listened to so far. Crinacle, in cooperation with KZ, really did a great job on tuning these drivers to the best of their ability.

Nevertheless, the ZEX Pro are far from perfect. Their biggest flaw is the 8kHz treble-peak that can make one or the other song almost unlistenable while being mostly unnoticeable in other songs. While this can to some extend be fixed with EQ, I don’t like having to rely on EQ.



Then there are the technicalities; maybe the biggest weakness of most KZ IEMs I’ve tried. Even at its price point of around 30 USD, the ZEX Pro cannot convince with its technical abilities. The sound especially lacks details and resolution, while at least offering a quite wide and convincing soundstage.

In the end, the ZEX Pro a.k.a. CRN is still a good little piece of equipment. For around $30 USD, you can get the best-tuned KZ IEM so far with nice vocal performance. It’s also the cheapest possibility to listen to a Cain-tuned IEM, if this is something you’re interested in.

More​

• View and read the review on Flightless Bird
• My IEM ranking (in beta right now, I'll add more IEMs in the next days)
• Frequency Response Graph Database
• Favorite IEMs: Moondrop Blessing 2 Dusk, Dunu SA6

At a Glance:


Sound Signature: Neutralish Flat leaning towards a mild U


Category: D (0 -20 USD), MSRP: 20 USD, Acquired at: 0 USD (Review Unit)


Disclaimer:


A KZ ZEX Pro/CRN was sent to me by the KZ Official Team in exchange for a fair and honest review. This review is not sponsored, and no money was involved whatsoever. No external influences aside from my own will change the content of this review, and as always, all thoughts and opinions are my own.





Overview:


The CRN are among the many recent releases of the Chi-Fi giant Knowledge Zenith in the 20-40$ price range, they perhaps only stand out as they are a collaboration with the famous IEM-grapher Crinacle. It features the same driver configuration as it’s predecessors the CCA NRA and ZEX Pro (which was a single 10mm dual-magnetic dynamic driver, and a single 6.8mm “low voltage electrostatic” driver, which is more likely a magnetostatic driver) but now tacks on a single Balanced Armature driver.





Unboxing:


This IEM comes in the by now incredibly familiar white box that many budget Chi-Fi IEMs from different brands also come in. It’s a standard slide out box, the outside features a picture of the product with some extra info on the sides and back. Sliding it out reveals the IEMs nested in a cut foam platform which when removed reveals the new KZ 2-core cable that I first saw on the EDX Pro and a pack of KZ’s popular “Starline” tips as stock/.


The included cable is an excellent new addition to KZ’s budget products. It’s very soft and extremely resistant to tangles and kinks. The connectors are made of a transparent plastic whilst the 3.5mm jack and the splitter are made out of a hardened rubber material. The only gripe I have it that it has a fair amount of shape memory, however this is thankfully remedied by the softness of the cable, and for a budget IEM, this is one of the best I’ve seen rivaled only by the Moondrop SSX and FAAEAL Hibiscus stock cables.


Overall decent stock package. However, considering this is the same cable that comes on the much cheaper EDX Pro, I was hoping that there would be something of an upgrade in this department. At this price I can still let it go, but above the 40-50 $ range, KZ needs to have a better cable in the box, as well as improved packaging in order to make the upgrade more meaningful.





Ergonomics:


Comfort:


Like it’s predecessor the ZEX, the CRN is built with a painted metal faceplate and a plastic shell facing the side of your ear when worn. However, unlike the ZEX, the CRN adopts a more molded, pseudo custom design that attempts to improve comfort by contouring the shell with things like a depression for the tragus, a molded bulge in the antitragus area and a concha fin. Additionally, unlike the ZEX, the CRN has a much wider nozzle, which eliminates the issue of making tip-rolling difficult. Overall, I personally found comfort, and thanks to the tight fit, isolation to be quite good with the CRN however, the shell is a bit on the larger side and may not fit that well for everyone’s ears.





Build:


As mentioned earlier, the CRN sports a nice metal faceplate which does help improve the overall feeling of the build. However, the paint used here, similar to the ZEX is rather prone to chipping and being scratched off. I suggest KZ use a better method of affixing coloration to the bare metal like anodization or perhaps even particle vapor deposition. This issue is quite a pity, as the CRN faceplates look quite good.


Nevertheless, the CRN seems to start showing the limitations of KZ’s manufacturing capabilities. The addition of the BA driver likely increases complexity, particularly within the wiring of the drivers and it shows. Though there was an attempt to tidy up the insides, the wires still look like a rats nest. I assume this was due to the fact that they had to lengthen the wires to be able to solder everything together in the assembly stage.


Additionally, the shell seems to have also taken a hit thanks to this. Likely due to the difficulty of accessing the micro-soldering points of the different components inside, the shell is 4 different parts. This means that there are many more failure points than a comparable 3D printed or dual-piece housing, particularly on the seams between the different parts. Moving forward, it would likely pay KZ dividends to work on improving their shell design as I see nothing but problems with having this many components to the shell, particularly in long term durability as I suspect that over time, the locking joints of the shell pieces in particular may fall victim to oxidation and other chemical processes resulting in cracking. The mess of wires does nothing for repairability as well.


KZ needs to find better tooling methods, particularly if they plan to expand into pricier and pricier multi-driver IEMs.





Sound Review Conditions:

• Stock KZ 2-core QDC cable
• Stock KZ “Starline” Tips (M size)
• Schiit Bifrost R2R/MB+Asgard, Topping L30+D10s, LG V50, HaaFee HA9 AMP, Jcally JM20 Dongle
• Deezer HiFi, Foobar 2000, Signalyst HQ Player, UAPP for V50

Sound:


Bass:


The CRN presents a bass response that is clean, extremely well defined and controlled. It seems to be just mildly skewed towards the subbass region, which makes sense considering how this is perhaps aimed at those who want an almost boring “monitorish” sound. The subbass shelf and relative lack of midbass means that this IEM has bass that has both presence and impact without the usual issues that come with boosting the midbass instead. Here, there isn’t even a trace of bass bleed, and the bass region is rather well controlled on the Attack-Decay side, reproducing texture, speed and articulation quite well. However, this precision comes at a steep cost. The CRN’s bass region is, for lack of a better word, boring. There is little to no character or coloration. I would even go as far as to say it sounds near-dead, even with the slight subbass shelf. Therefore, I would say that this tuning is perhaps ideal for musicians or for those who might believe that flat is justice. Whether or not that is a good or a bad thing, is purely up to the listener.





Mids:


There seems to be a recurring theme here with the CRN, as the midrange takes characteristics that are directly analogous to the way the bass response was tuned and even takes the “monitor” sound up a notch. The CRN’s midrange is about as even and flat as a dry plain. It’s tonal characteristics remind me of a wire, likely a deliberate choice. The upper and lower midrange areas are well balanced and neither take the stage. Instruments are reproduced in a precise but boring manner. While some may find this appealing, another group will find things like thin vocals for both the upper and lower midrange as well as the fact that there are hints of metallic tonal characteristics left behind a problematic issue. Once again, the midrange is clean, balanced and utterly soulless.





Treble:


The CRN’s treble is for the most part, is about as flat and linear as the other registers of this IEM. It has mostly inoffensive and reined in lower treble and high treble extension or air in it’s upper regions. However, it is not completely linear. Regretfully, the only area of real coloration and non-linearity within the CRN is also perhaps it’s worst element. As many will know, the CRN has a treble peak at around 8kHz, which is quite devasting to the tonal qualities of cymbals. It gives them a weird, splashy tonal qualities and further exacerbates or is causative of the metallic timbre or resonances within the treble region. Aside from this issue, the treble is flat as can be and once you EQ it down, the CRN does become an almost tonally flat IEM. I just can’t quite shake the fact that a tuner as renowned as Crinacle would allow his name to be plastered on an IEM with a flaw like this, but as he is a proponent for EQ, perhaps that was the sacrifice that they made in order to improve another section of this IEM. Nevertheless, the treble peak is there, and rather audible so buyer beware.





Technicalities:


The CRN is an extremely average to perhaps below average IEM in the way of technicalities, and it’s certainly not a standout feature for this IEM so just let me rattle off my thoughts. Soundstage is mediocre for the price, not too cramped but certainly nowhere near spacious. Frontal and Rear depth is of course scooped, with a slightly oblong stage. Imaging is quite blurred and sounds more like a sound is coming from a general area or even direction rather than occupying a finite area.


Instrument Separation is also less than ideal thanks to the mediocre stage and lacking in focus imaging. Timbre is off, rather metallic and thin. Detail Retrieval and overall Clarity are passable, possibly thanks to some forced treble detail, but still nothing to write home about. The CRN has absolutely nothing to brag about in the technical department, and though it isn’t bad, I hoped for better.





Conclusion:


The CRN has it’s target audience. Musicians, and other professionals looking for a cheap, mostly linear IEM as well as audiophiles and consumers looking for a flat signature. However, it’s treble peak, as well as subpar technicalities certainly won’t endear it to others. Nevertheless, the tuning is quite useful and uncommon so there is a market for them so long as the buyer knows what they’re getting into. Recommemded at Discretion.

KZ x Crinacle CRN, ZEX Pro ($36-$49): A new twist on KZ tuning.



Jeff from KZ approached me about reviewing the ZEX Pro for them. I will also be receiving a couple of other models as part of an agreement as well. In the time it took to send the model and receive it, he contacted me to let me know the model came about in conjunction with reviewer Crinacle, hence the name change. He assured me both models are tuned the same and are identical.

Even though this is a review sample, it is understood that the model may be asked back for at any time, but until then is mine to keep, but not sell. All measurements below are listed on the website and all links below were provided to me by Jeff. I thank both him and KZ for the opportunity to review the ZEX Pro.


Amazon

USA：https://www.amazon.com/dp/B09MTFPV4P

DE：https://www.amazon.de/dp/B09NNG6DJ6

JP：https://www.amazon.co.jp/dp/B09NNG9BFS

website：https://www.kztws.com/products/zexproxcrinclecrn


Specs:

Model：KZ X Crinacle CRN (ZEX Pro)
Impedance：25Ω
Sensitivity：104dB
Frequenc：20-40000Hz
Plug Type：3.5mm
Pin Type：0.75mm
Cable：Silver-plated double flat cable
Cable Length：120mm
Earphone Type：In-ear


In The Box:

KZ x Crinacle ZEX Pro
Extra tips
Silver-plated flat cable
No Case (STILL!!!)



Gear used:

Shanling M6 Pro
Cayin N6ii E01
MBP/XDuoo XA-10


Songlist:

Eagles-Hotel Cali Live 1999
Brian Setzer
Joey Alexander-Warna album and others
Mark Knopfler-Laughs And Jokes And Drinks And Smokes
Santana w/ Mana- Corazon Espinado
twenty one pilots Christmas
Tedeschi Trucks Band
Big Head Todd & The Monsters-Beautiful World
Mark Knopfler-Down The Road Wherever
Elton John-yep, still good, still cool


Unboxing:

In typical understated KZ fashion, the box is small and straightforward. Removing the clear cover, you find the unit, cable and tips. This has become KZ’s de rigor for unboxing. Simple, straightforward and easy. And still...no case.



Technicals:

Running a 30095 balanced armature, 10mm dynamic driver and a 6.8mm electret magnetostatic unit, the ZEX Pro is a true tribrid. Running the trio drivers in order to make a more balanced sound, instead of the typical high-end oriented KZ “house sound” is no small feat, and to do so, Crinacle was brought in to tune the critter. Marketed as “what used to be the realm of high end,” the KZ markets itself as an all-arounder, for a smooth balanced sound. This might sound suspiciously like a certain curve, and you would be “mostly” correct. More on that later. Suffice to say that the KZ does offer a balanced smooth signature, which does indeed depart from recent KZ models.


Build/fit/finish:

In typical KZ fashion (there it is again...) the build is quite good, and fit is of high quality as well. Using medical grade resin for the shell, there is an aviation grade Zinc faceplate bound expertly to the shell. The only downside to the shape is the overly larger knob, which does hinder fit after longer sessions. I find that the knob is bothersome to say the least. I might ask KZ to stop marketing this as “after using several thousand ear models in order to maximize comfort,” as I seem not to be the only one who has fit issues. This is of course not limited to KZ shells. Plus, KZ continues to use the less than industry standard of 0.75mm 2-pin connectors for the cable, so forget about switching with the more normal sized 0.78mm. So be it, since this is an affordable unit.

The cable is of four flat-braided silver-plated strands, which split into two at the Y-splitter. It lays nicely, and does not tangle, but the over ear guide reminds me of the old spectacles, which Anthropologists would wear when examining something. The guides, which seem to wrap all the way around. Too long for my tastes. I have never had an issue with KZ builds or cables, and do not here, only the fit is a bit off to me for my averaged sized ears.



Sound:

Summary:

KZ is known for “energetic” high end sounds. Some might call them a tad too bright for the tuning. Charged with making a more neutral (and more mainstream) sound is tough when your bread and butter lies with that energetic sound, which many do like. Of all the numerous KZ’s I have heard, the ZEX Pro is the most neutral and least offending of all. It does come across as nearly neutral, with adequate bass and mids, which come across as fairly clean, but not all that inspiring. Mind you this is not bad, just not as energetic as we are used to from KZ. Treble notes reach fairly high but seem to be hindered like a dog on a leash. They want to go further, faster, but the owner holds them back lest they get so far ahead the owner might have to break a sweat to catch up. Again, this is not bad, just different. Overall, the soundstage is adequately wide and high, but a bit shallow in depth for me. Crinacle was charged with making the ZEX Pro more mainstream, without offending, and I do think he has succeeded. But at what cost?

Moar:

As mentioned above, the overall tonality is not bad, just not all that exciting. I can admit that when I pony up for a KZ listen, I expect it to be a bit hot for my tastes with polite bass. Here though, that bass comes across as a solid foundational aspect of the tuning. A nice change, but it is not overwhelming. As such, it does not bleed into the mids like some KZ have in the past. Allowing those mids to come across on their (mostly) own, they are solid, but again uninspiring. Tommy Emmanuel’s live Guitar Boogie is quite a good song with which to judge mids and acoustic treatment. I get a bit of resonating here (yes, it is a live song), that comes across as hindering the overall pleasure of the song, but not too offensively. Each strum is heard in concert with the others where on similar IEM’s they might be held separately allowing the user to gauge when each string is struck. Call it going for the overall sound, instead of individual treatment.

Up top, there is no denying this is a toned-down version of the traditional KZ “house sound” in the treble note. I find myself actually questioning whether this really is a KZ due to that taming of the shrew. Please take that as you may, for I am not the best judge of sound up top except for harshness. And the ZEX Pro is not harsh. Not in the least.

Soundstage as mentioned is fairly wide and tall, but a bit lacking in depth to me. There is nothing extraordinary here, but nothing offending either. Thus, instrumentation, layering & separation all follow suit without being extraordinary. On Jesse Cook’s really cool rendition of Number 5, bass does come across as strong, and there is good placement, but layering is only average. Mind you, this does not bother me for the song is so, so good. But the cymbal hits sound artificial here, lending an air of computer-generated sound to the acoustic mix. Not the best, not the worst, just there.

Natalie Merchant’s sublime vocals on The Peppery Man are to die for as is the song, but I am left with a want, a desire for more here as her voice normally cuts to my soul. On the Crin, it falls short, but again is not offensive. Take that as you may, but to me female vocals sound a bit thin in comparison to others at this price. Again, not bad but not inspiring like it should be.


Finale:

I will admit that this was surprise appearance at my door, while waiting others from Jeff & KZ. I do not mind, for a gift such as this is still welcomed into my abode for the listen and review. Some may think, “well...it’s FREE, you should be grateful regardless!” And of course, I am, but the surprise of getting an unexpected guest in the house still makes a smile across my face.

And in using the KZ x Crin ZEX Pro, I can put a smile across my face for it is not really as bad as I make it out to be above. It is a most definite departure from the “normal” KZ tuning, which caught me by surprise to say the least. But it lacks inspiration as well. It does all mostly well, but not inspiring. This would definitely be called the “jack of all trades.” But Jack has no speciality either. Learned in much, but expert in none, this Jack lacks the inspiration of the other KZ models, which do come across as bright or overly heightened bass levels. But that is the point to many of them. You either liked them or you didn’t. I do not fault those who like the sort of tuning from other KZ models, and those KZ models can pretty much be singled out for the “driver war” and other such innovations, which all companies jumped onto. That alone shows the might of a company, which can transform a whole industry by inserting 1-2 models into our consciousness. That was KZ’s motis operandi and with this model they went so far to the left, that one hopes the vehicle of development has full-on 4wd. That isn’t a bad thing, for they again seek to develop a path on which we did not know we needed to take. But with the Crin-tuned ZEX Pro, it fears that off-road lest it get its feet wet or dirty and is perfectly happy toeing the line of inoffensive mediocrity. A mainstream IEM, when there was a real chance to develop a truly different IEM. Mind you, at this price, many, many will gobble it up for the name alone. And if that was one of the goals, then one cannot fault either too much.

I thank Jeff and KZ for the KZ x Crin ZEX Pro sample. It does take a certain amount of faith to stray from their tried and true path. I applaud that effort and do look forward to what comes down the line from KZ.

Cheers.

INTRODUCTION AND DISCLAIMER:​

The KZ CRN, first introduced as the KZ ZEX Pro, is a hybrid in-ear monitor (IEM) using a 10mm dynamic driver and a 30095-pattern balanced armature in each housing. The CRN is a collaboration between KZ and the preeminent IEM reviewer Crinacle. The CRN was provided to me by KZ in exchange for my evaluation. The CRN is available on Amazon for $39.

Crinacle is one of my foremost influences as a reviewer and I owe him a tremendous debt for helping to get started with taking frequency response measurements. Despite these factors, I will endeavor to be as objective in my evaluation of the CRN as possible.

SOURCES:​

I have used the KZ CRN with the following sources:

• Qudelix 5K
• Audirect Beam 3 Pro
• Ikko ITM01

MUSIC:​

I have tested these headphones with local FLAC and Spotify Premium. Visit my last.fm page to get an idea of what I listen to:

XenosBroodLord’s Library | Last.fm

PACKAGING AND ACCESSORIES:​

Note: My review sample was sent out prior to KZ’s collaboration with Crinacle being revealed and is still branded as the ZEX Pro.

The KZ CRN comes in a small rectangular white box with a white slipcover. The slipcover pictures the CRN on the front and provides KZ’s contact information and technical specifications for the CRN on the back. Inside the box are the IEMs, a detachable .75mm 2-pin cable, 3 pairs of silicone eartips (S, M, L), and a user manual. The CRN does not come with a carry bag or case.

BUILD QUALITY AND DESIGN:​

The KZ CRN has dark translucent acrylic housings with satin black metal faceplates. The quality of the finish of the faceplates is cheap looking. The housings have a pseudo-custom fit. The faceplate has a small vertical mesh slit on the bottom corner but covering this vent does not appear to impact the sound of the IEM. There do not appear to be any vents on the body. The metal nozzles have small lips for securing eartips.

The included 2-pin cable is typical of a KZ-type IEM, which is to say it is tangle-prone and infuriating to use. The cable included with the CRN is perhaps the most tangle-prone non-braided cable I have ever encountered. The cable uses QDC-style extruded connectors. “L” and “R” indicators are faintly embossed on the 2-pin connectors, but the connectors must be held up to a light source to see which connector goes to which channel. The cable has chunky rubber hardware at the Y-split and 3.5 mm jack with substantial strain relief above the 3.5mm jack. The cable has pre-formed earguides without memory wire. There is no chin adjustment slider.

COMFORT, FIT, AND ISOLATION:​

The KZ CRN is intended to be worn cable up. The CRN is very comfortable to wear for extended periods. I did not experience driver flex with the CRN. Isolation is above average.

MEASUREMENTS:​

Measurements of the KZ CRN can be found on my expanding squig.link database:

KZ CRN — Squiglink by Bedrock Reviews

My measurements are conducted with a Dayton iMM-6 microphone using a vinyl tubing coupler and a calibrated USB sound interface. The measurements use a compensation file derived from relating my raw measurements to published measurements from Crinacle and Antdroid. There is a resonant peak around 8k. Measurements above 10 kHz are not reliable.

SOUND:​

The KZ CRN has a U-shaped sound signature. It has a sizable sub-bass shelf, a neutral midrange, and an elevated lower treble region which rolls off sharply in the mid-treble.

The CRN’s bass response is about as resolving as I would expect for an IEM of this price, with average speed and articulation. Sub-bass extension is excellent, but bass texture is moderate at best. There is ample note weight, but slam is lacking for my tastes. Because the bass elevation is contained to the sub-bass region, there is no mid-bass bleed into the midrange.

The CRN’s midrange tuning is very good overall, with a tasteful amount of ear gain in the pinna region and a moderate elevation in the presence region which is more of a mound than a mountain. Female vocals sound much more energetic and vibrant. Male vocal intelligibility is passable, but female vocals are much more cogent. Midrange clarity is good, but male vocals lack warmth and have limited body.

The CRN’s overall timbre is very thin and dry sounding overall, particularly for the hard rock and metal music that I predominately listen to. The substantial elevation in the lower treble being followed immediately followed by a precipitous roll-off is at least partially to blame for this. There is too much sparkle and not enough air. Treble transients are quite grainy as well. Crinacle has provided the following PEQ settings to partially remedy the issue:

8000Hz -5dB 5.0Q, Peak filter

Click to expand...

12000Hz +10dB 4.0Q, Peak filter

Click to expand...

These adjustments help with the above issues but do not alleviate them completely.

The CRN’s detail retrieval, soundstage size, and instrument separation are merely adequate for the price point. Imaging is surprisingly good, however.

COMPARISON WITH WITH THE TANCHJIM TANYA:​

Tanchjim Tanya Review

KZ CRN, Tanchjim Tanya — Squiglink by Bedrock Reviews

The Tanchjim Tanya is a single dynamic driver IEMs with a bullet form factor. It opts for a more mid-bass-focused bass tuning than the CRN and a sharper ear gain region centered closer to 3 kHz. It comes in well under the CRN’s price point. The Tanya has superior bass articulation and texture compared to the CRN. I also feel the Tanya has better overall detail retrieval. The Tanya presents male vocals with more warmth and greater intelligibility than the CRN. However, male vocals can come across as either scooped or shouty on the Tanya depending on the density of the accompanying midrange instrumentation. With metal tracks, distorted electric rhythm guitars are muffled in comparison to harsh male vocals and the overall midrange clarity takes a hit. With genres with more sparse instrumentation behind vocals or which typically place vocals more prominently in the mix, male vocals can come off as shouty. While the Tanya’s upper treble extension is also quite limited, it has much more natural timbre than the CRN. Soundstage and instrument separation are comparable between the two, but the CRN takes the win with respect to imaging.

SOURCE PAIRING:​

The KZ CRN is very easy to drive. I did not notice any hiss during my listening on any source device.

CLOSING WORDS:​

The KZ CRN is a dramatic step forward for KZ, but the treble balance, timbre issues, and average technical performance keep the CRN from being an unqualified recommendation from me. These issues can be remedied with PEQ, but if you have access to PEQ the need for such a strong starting point in terms of base tuning is much less, and you might do better to pick something more technically proficient instead.

The KZ CRN can be purchased below:

KZ x Crinacle CRN ZEX Pro

KZ’s official Discord server can be joined here: https://discord.gg/WnNJEKfurZ

FOREWORD​

• This unit was sent to me directly by KZ for review purposes
• I never use EQ
• I have spent over 150 Hours on my ZEX Pro alternating between isolated burn in and actual daily listening approximately 3 hours per day
• There will be lots of reference and comparison done to the original KZ ZEX (which I will refer to as OG ZEX throughout this article)

THE BUILD & WEAR
ZEX Pro is a triple hybrid IEM consisting of one Balanced Armature, one Dynamic Driver and a single Magnastat Driver (not a real Electrostatic). The sensitivity level is rated at 104 dB with overall impedance of 24 Ohm, so this is a very easy to drive unit and highly efficient.

What I do like about this ZEX Pro is how simple the design is. Flat black faceplate and no-nonsense shell. The simplicity is a beauty in itself. The packaging is quite simple, and I am pleased that KZ also included a set of Foam tips which is my preferred way of wearing IEMs. The entirety of my review is based on using this stock KZ Foam tips and I did not feel the need to roll tips as I get great comfort, seal and sound from it

However, I would like to note that the stock SPC cable is not something that I would consider great. At this price point I had hoped that KZ would have done better than to use the very same cable that came with the cheaper ZEX and KZ EDX. Some of the competition in this price segment was able to include better constructed cables. Having said that, I have opted to swap out the cable after 24 hours of usage as I feel that it does not do justice to the ZEX Pro. I feel that the cable impeded the true potential of ZEX Pro for being less transparent sounding. I ended up using either Kinera Leyding or VE Basic DI copper which suited my taste better

Wearing ZEX Pro is quite comfortable. The inner shape of the shells melded well with my ear concha and once settled in, I was able to wear it for hours without feeling any fatigue to my skin

TIMBRE, TONALITY & DYNAMICS​

From the get-go, I was actually shocked. This does NOT sound like a KZ at all. KZ house sound that I am familiar with has always been V curved with strong emphasis on lower frequencies. Take OG ZEX for example, an IEM that I liked a lot (after extensive cable and tips swaps), the OG ZEX has that pronounced Mid-Bass segment that is strong and commanding. This ZEX Pro, actually sounded much more balanced compared to the OG ZEX.
However, I must say that after extensive usage, ZEX Pro does not have that organic timbral balance that I liked so much from the likes of OG ZEX. At times I find the tonality veers towards being slightly dry and metallic (depending on what songs and genre). It seems to me that in the process of wanting to live up to the “Pro” moniker, the ZEX Pro has sacrificed a bit on tonality for technicalities. Dynamic range is as great as it can be. Lows, Mids and Highs seems to be well balanced and extended – a marginal improvement when compared to the OG ZEX which many will perceive as not as extended as the ZEX Pro – but to me it is the case of OG ZEX being not as pronounced sounding and does not present it harder than the ZEX Pro.
Ultimately, I will regard ZEX Pro as still a very mild V sounding unit.

MIDS​

For a KZ IEM, the Mids presentation of ZEX Pro seems to be placed slightly more forward than their regular tuning. The placement of Mids in the entire spectrum offers better intimacy if compared to the OG ZEX (in stock form). What I do like about ZEX Pro Mids is that it sounded natural enough despite lacking a bit of warmth – it is a bit dry. Instruments especially percussions and strings have good crispness to the tone without being overly edgy. However, if I am to nitpick, percussions seem to exhibit a bit of flatness to the tone which takes away the feeling of wholesomeness.
Vocals wise, ZEX Pro offers natural tonal balance which I deemed as accurate – the caveat being as noted earlier, it does not have that warm organic bias to it. Perhaps this is a subjective preference but to enjoy Jazz and some Bluegrass music, especially females like Alison Krauss, Sinne Eeg and Diana Krall, a touch of organic warmth goes a long way connecting the listener to the singers. In comparison, the OG ZEX despite being more V curved than this ZEX Pro, OG ZEX actually has better presentation on this subject for the overall smoothness of vocals.

TREBLE​

Now, this is where ZEX Pro differs a lot from the OG ZEX. The presentation of ZEX Pro Treble is undeniably brighter than the OG ZEX. It has lots of sparkle and perceived extensions due to the pronounced overall Treble projection. ZEX Pro Treble is markedly crispy and airy. In contrast the OG ZEX is a bit more reserved and less splashy – but this also means the OG ZEX is smoother and more refined.
The issue I have here, after extensive listening sessions with many types of sources from under 1 Vrms to over 4 Vrms, I must admit I am hearing some grainy Treble decays that is dry and less than realistic sounding. Even with smoother sources like the Lotoo PAW S2 (which is the smoothest sounding Dongles out there now), I can still hear this lack of articulation on Treble edges – impacting primarily songs that has lots of cymbals, hi hats and percussions. This makes ZEX Pro less than pleasurable when used to listen to Rock/Metal/Indie genre. Perhaps not as glaring on Jazz and Pop music. The overall Treble performance being dry and granular as how I perceive it, a brightness bordering on sibilance (but not as sibilant as some brighter sounding IEMs).
With the noted Cons as stated earlier, it is hard to discern the level of Treble details presented. Macro details is there but the Micro details suffered a bit due to the graininess of Treble edge

BASS​

The saving grace for ZEX Pro, Bass performances. It is tight, fast and superbly controlled. Very unlike the traditional KZ signature. For the first time hearing from a KZ device, the Mid-Bass does not attempt to overpower everything. Mid-Bass has great maturity to stay within its own space thus allowing Sub-Bass and lower Mids to perform unobstructed. I would even say that the Sub-Bass performance of ZEX Pro is what makes it enjoyable to my ears. It does have that smooth and deep sensation.
In comparison, the OG ZEX has stronger Mid-Bass. But really between the two I would say that the level of details and texture is pretty much similar. I can’t decide which one if more resolved with Bass over the other, at least within my listening ability I can’t tell.
Ultimately, I do not think ZEX Pro will appeal to Bassheads. There’s a different solution to that need and it is in the form or CCA CA16 Pro of KZ ZAS.

TECHNICALITIES​

Soundstage on ZEX Pro is admirably wide and spacious. Perhaps a tad better width compared to the OG ZEX. There’s good sense of air and space. Perhaps the headroom not as tall as how I would prefer it to be.
Imaging and layers separation are quite good too. It is clean as it is resolving. Perhaps not as sharp as the top dogs but I would not complain about it for as long as the imaging does not present itself being mixed up as the complexities goes higher. Which also means ZEX Pro has great speed to resolve dynamic transients thus avoiding congestion and compressed passages.
Being a triple drivers hybrid, coherence level on ZEX Pro is great without any hint of anything out of sync. There’s harmony in how the sound flow from one frequency to the other.

SCALABILITY​

Now. Simply put ZEX Pro is a very efficient IEM which already sounded great with 1 Vrms sources. Be it driven directly from my Sony Xperia X Compact or LG V50 (low gain mode), I am hearing good fidelity level indicating that the sound spectrum is already bloomed at near maximum potential – similar results from both Avani and Abigail. However, it does sound slightly better with up to 2 Vrms and I found the best of synergy with HiBy FC5 (clean crisp sound), Lotoo PAW S2 (smoother presentation) and Cayin RU6 (well-balanced near analogue tonality).
However, pushing it above 2 Vrms does not present any marked improvement. In fact, I would go against it as it seems ZEX Pro will suffer from being edgy and overly euphonic sounding when fed with strong feeds. So, I ended up not using my ZEX Pro that much at all with the likes of CEntrance DACport HD (4.1 Vrms), RAP5 (5 Vrms) and most definitely not with VE Megatron (4.7 Vrms). On the Megatron I can hear audible floor noises in the background.

EQUIPMENT USED​

• LG V50 ThinQ (3.5mm SE and USB Port)
• Sony Xperia X Compact (3.5mm SE and USB Port)
• HiBy Audio Player USB Exclusive Mode with FLAC files
• HiBy FC5 4.4mm BAL (2 Vrms)
• Cayin RU6 4.4mm BAL OS (2 Vrms)
• Lotoo PAW S2 4.4mm BAL (2 Vrms)
• Abigail (1 Vrms)
• Avani (1 Vrms)
• CEntrance DACport HD 3.5mm SE (4.1 Vrms)
• VE RAP5 3.5mm SE (5 Vrms)
• VE Megatron 4.4mm BAL (4.7 Vrms)

Verdict​

I can clearly see where this is heading with ZEX Pro. I truly admire KZ tenacity in their continuous effort to provide us the consumer with great sounding unit at very affordable price. Some may even laugh at KZ for releasing new IEMs before the previous ones even had the chance to settle down, but I say let KZ continue doing this because the more they produce new stuffs, the more they adapt to the consumer needs and at the same time still keeping affordability in check.
This is the case with ZEX Pro. It was already being advertised even when we were still awaiting shipment of the OG ZEX as I recalled it.

Sound wise, I must admit that I have built somewhat higher expectations of ZEX Pro. I was very impressed with the OG ZEX (after I modded it with cable and tips swaps), and I honestly expect ZEX Pro to outshine it in every way. But alas, on a very subjective level of sound preference and taste, I still prefer the more organic and mild performances of the older ZEX. But don’t take my word as it is. My reviews are always based on personal preferences and my sensitivity level to sound. I can totally see that ZEX will appeal to some, especially those preferring brighter presentation that is a bit more euphonic and energetic.
#kzzexpro

This is also available in Spanish on my blog and on YouTube.



The KZ ZEX Pro has been sent to me by Linsoul in exchange for publishing this review. As usual they have not requested anything specific, therefore, as usual, my review will be as honest and unbiased as possible but it is always good to consider the fact that these IEMs have not cost me anything.

I don't post purchase links, even though they are non-affiliate, outside of my blog and channel, so you can find the KZ ZEX Pro, also known as the KZ X Crinacle CRN (more on that in a moment) via Linsoul by visiting the version published on my blog (or using google )


Intro…

As I just said, the KZ ZEX Pro is also known as the KZ X Crinacle CRN, something that has led to a bit of confusion in regards to these IEMs and whether or not they are identical. Crinacle published this a few days ago, which serves to clear up any misunderstandings but in case you haven't read it (and don’t want to), the quick recap is that the KZ ZEX and the KZ X Crinacle CRN are exactly the same IEMs, with the exception of the Crinacle logo on the CRN version.

Basically the KZ ZEX Pro was tuned by Crinacle but was released before the announcement was made public, the idea being, according to Crinacle and KZ, to see how the tuning was received before Crinacles name was linked to it. This was to see if the tuning was well received without using the “Crinacle” name or to see if it depended on his name to become a hit. I guess that it is sort of like Richard Bachman seeing if he could become a best selling author before telling everyone it was just Stephen King under a pseudonym. Yes, there is a bit of a difference between Stephen King and Crinacle but you get the idea.

I got sent the KZ ZEX Pro before the announcement was made, therefore my set does not show any mention (or logo) of Crinacle, but again, the IEMs are exactly the same.

Confused?

Ok, now let’s get on with the review of the “KZ ZEX Pro a.k.a KZ x Crinacle CRN (ZEX Pro)”



Presentation…

I am not sure if there is any difference in the presentation of the CRN branded version but the ZEX Pro arrives in a packaging that is identical to that of the ZEX, with the same contents.

The typical white KZ sleeve from which a tray slides out to reveal the ZEX Pro IEMs covered by transparent plastic, underneath which we find the usual user manual, a couple of spare silicone tips and the cable that KZ includes recently with all of their products, in my case with an inline microphone.

Nothing special or out of the ordinary but we are talking about a set of 30€ IEMs (about 2€ more if opting for the CRN version), so there are no complaints from me regarding contents.



Build and aesthetics…

The shape of the IEMs does differ from the original ZEX, this time opting for a shell shape that was used on the KZ DQ6. As far as looks, both are (the ZEX and the ZEX Pro) are decent looking simple IEMs in my opinion, I really can't say I prefer one over the other as far as looks.

As far as comfort, they are again both fairly comfortable, with no specific complaints from me, although I do find that the original ZEX sits inside my ear a little better, being a little smaller.

I have already mentioned the new KZ cables a few times in previous reviews and my opinion hasn’t changed. They are not the best cables in the world but are far superior to previous cables used by the brand.



Sound…

First off, let me start by saying that the ZEX and the ZEX Pro are tuned completely differently, therefore there really isn’t much to compare between them. I mean, I could list the differences but it would not really be very useful, as it is different in almost every part of the frequency range. Where the original ZEX has the usual KZ emphasis on the mid bass, running into the lower mids, with quite a dip in the center of the mids to later climb up and complete their usual V shaped tuning, the ZEX Pro follows a curve that matches my personal tastes more than the originals.

Starting off with the subbass, I like the fact that the presence starts to climb around the 100Hz mark and continues to rise the lower the notes get. This works well to give the subbass a nice balance, counteracting the natural roll off of our hearing as we go low, giving presence to the lower registers without actually overpowering any of the mid bass and lower mid frequencies.

Tracks that have plenty of info in the subbass realms come across nicely and I don’t find myself needing more in tracks like “Chameleon”, “Royals” or any of my other subbass test tracks.

Moving into the mid bass, it is slightly below what I would consider perfect (for my personal tastes of course) but only slightly. In general, the subbass and midbass follow my preferences very closely. It is also clean and articulate, without seeming to fall apart on busier tracks. The bass on “Killing In The Name” is a good sample of how the ZEX Pro keeps it clean and articulate in the low end.

Moving into the lower mids, the transition is clean and well defined. Crinacle mentions that he likes to boost bass in the lower ranges to keep the 300Hz area clean and avoid bass bleed, and it works well. I don’t get the impression that the bass bleeds into the lower mids at all. I do sometimes miss a bit of body when listening to purely acoustic guitar based music but that is the price to pay of the presence being slightly below my preferences in these frequencies. However, I would much rather it be lean in this regard than bloated.

Moving into the higher regions, here is where my first real complaint comes. There is a harshness that appears on occasions and can make vocals become a little shouty and too upfront. Now, the strange thing about this is that I have measured and compared graphs and don’t see any specific spike on paper that would cause this. It is also not on every track, or all the time, it is just with specific songs where things sound suddenly harsh and actually painful at times. I have found myself checking quite a few times if I had any EQ on by accident but it wasn’t the case.

An example would be the voice of Rag’n’Bone Man on “Human (acoustic)”, where his voice has a harshness that I don’t find on other sets.

As far as sibilance, I do find it to be a little too hot for my personal tastes, but again, it is only slightly. “Code Cool” does present a little sibilance throughout the track but it is by no means terrible in this regard. I would just prefer it to be a little tamer in this range.

As far as soundstage they are around average but with slightly higher than average image placement. The soundstage is not huge but does at least give the sound enough space to play around, with the images being placed fairly well, making the most of the space they have. “Bubbles” is enjoyable and the ZEX Pro are good enough to appreciate the intent of the song, something that I feel is very important.

The overall detail is also decent, especially if we consider the fact that they cost just over 30€. They are not detail monsters but I didn’t find myself feeling that I was missing anything, nor did I have to focus too much to appreciate the overall detail of the music I was listening to.



Conclusion…

The 30€ price bracket of IEMs is getting more and more crowded by the day, with some models offering a performance that is far more than one would expect for the price. The ZEX Pro is a set of IEMs that directly aims to compete with the better sets in the price bracket. In fact, I have heard sets costing far more that sound less impressive.

I feel that the tuning is very close to my personal preference and while I would prefer to somehow tame that harshness and slight sibilance in the higher regions, those are really my only complaints.

I can’t say that these have suddenly become my favourite IEMs but I also cannot deny the fact that for their price, they are a very good set of IEMs. The “KZ ZEX a.k.a KZ X Crinacle CRN (ZEX Pro)” are certainly worth a listen if you want to find out what the extreme budget section of IEMs is capable of nowadays.

KZ x Crinacle CRN (ZEX Pro) Review - The Birth of an New Era (?)

Disclaimer: This unit was provided to me by kzearphone.ph in exchange for my honest opinions for this IEM. Your mileage may vary.


Specifications
Pin Type: 0.75mm 2-Pin
Driver Configuration: 1 Dynamic Driver + 1 Magnetostatic Driver + 1 Balanced Armature Driver
Frequency: 20Hz ~ 40kHz
Impedance: 25Ω
Sensitivity: 104dB/mW

Sources Used: Zishan U1 (ES9038Q2M), Sony NW-A55 (Walkman One, Neutral Tuning)


Introduction

Approximately two weeks ago, the KZ ZEX Pro has started making rounds in the portable audiophile community. With its graph being close to the Harman target, a lot of people who have tried the ZEX Pro immediately liked it. Turns out that the ZEX Pro is actually a KZ x Crinacle collaboration, and is called the KZ x Crinacle CRN. The KZ CRN is tuned with the help of Crinacle himself, which explains the tuning that is has given that it is unusual for KZ to tune a IEM in such way. Seems like proper tuning has been done with the CRN. However, the graphs doesn't tell the whole story. The graph may look pretty, but the sound to our ears will pick up more than the graph shows. And today we will unravel if the KZ CRN will live up to its beautiful graph.


Build Quality

SPC Double Flat Stock Cable & KZ Starline Ear tips
- The new stock cable staple of KZ IEMs. For a stock cable, the build is really good. Simple, sturdy, and does its job properly. There's nothing that I can complain with the stock cable.

As for the stock eartips, it comes with white KZ starline ear tips. The ear tips are fine, and you could also make the KZ Starline ear tips to Reversed KZ Starline. A popular ear tips modification.

KZ CRN Earpieces
- First thing that I've noticed is that the size of the CRN is larger than the ZEX. It has a concha fin that is usually find in CIEMs. The concha fin helps me with the fit as it seats in my ears evenly, the fit is good but it ultimately depends on the shape of your ears.

The shell that houses the drivers inside is made out of translucent resin cavity and is large in size, considering that it houses three drivers inside. I like that you can clearly see the drivers inside the IEM, though its a different story with the color black variant.

The faceplate is made out of zinc alloy according to their website, which is said to be sturdy and have a nice finish. And I agree that the faceplate of the CRN has a nice finish and is sturdy. Looking closely to the faceplate, I noticed a open vent at the bottom of the faceplate. This might be one of the factors that contributes the the tuning of the KZ CRN.


Graph (Credits to : crinacle.com/graphs )




Sound

Bass
- The bass on the CRN has a nice bass response, with the sub-bass being more dominant over the mid-bass. This makes the bass of the CRN have depth to it, but lack the mid-bass impact that bassheads love. Fast and tight decay, well controlled, with just right low-end rumble. Smooth bass texture with just adequate amount of details in it.

Mids
- Mids on the KZ CRN is slightly recessed, details is average, lean body and clean sounding. Neutral presentation. The upper mids it becomes thin sounding at times. I find female vocals more enjoyable in the KZ CRN compared to male vocals.

Treble
- If you have checked the graph, you can see that there is the 8k peak. A bright sounding treble with a 8k peak, making the KZ CRN sibilant and have splashy treble. At the first track that I played with the KZ CRN is "Again by Yui" and I was welcomed by numerous sharp "S" and splashy treble. I lowered my volume in order to tame the treble a little bit, aside from that the treble sounds clean.

Soundstage and Imaging
- The soundstage of the KZ CRN is wide with average depth to it. Instrument separation and imaging is good.


Conclusion
- Overall I think that this is the best well tuned IEM (for now) that KZ has made with the help of Crinacle. The first time I had this IEM as KZ ZEX Pro, I thought that the tuning is vastly different from all other KZ that I've tried before. And then it was revealed that the KZ ZEX Pro's balanced tuning was tuned by no other than Crinacle himself, that explains why is the tuning is so different from the usual KZ v-shaped tuning. While it has a beautiful graph, the 8k peak definitely shows. I think that it is fixable by tip rolling or by EQ, Crinacle himself has shared a EQ setting for the KZ CRN to fix the issue.

Crinacle General EQ Settings for KZ CRN (Source: Crinacle Server on Discord):



I hope that even after this collaboration, KZ will continue to explore other sound signatures different from their usual v-shaped tuning. Bringing in a new era of KZ tuning.

Thank you for reading! If you have any questions, comments, opinions that you want to share, put it in the comment section below.


Links (Non-affiliated):
https://www.kztws.com/products/zexproxcrinclecrn
https://shopee.ph/KZ-ZEX-PRO-Electr...ZEXPRO-ZEXpro-ZEX-Pro-i.345922933.14802936479


#KZZEXCRN #kzhifi #kzofficial #KZAudio #ElectrostaticEarphone #Earphone

Disclaimer: I received this review unit for free from KZ (https://www.kztws.com/ ), thank you very much.

Price: 33 usd (CRN = 36 usd)

Specifications:

Impedance: 25ohm

Sensitivity: 104dB

Frequency: 20-40 0000Hz


Accessories:

S/M/L Clear Starline tips


Cable: 2-core cable, plastic connectors/dividers. No chin-slider. No microphonics.






Build: Metal faceplate + plastic shell, nozzle is also metal and has a lip and a filter. Average size.

Fit: Very good.

Comfort: Not that good for longer sessions since it has a wing that my ears don’t like.

Isolation: Pretty good, as the shell does cover my entire ears.

Setup: Schiit Asgard 3 (low-gain, volume around 8-9 o´clock),

Lows: Very clean bass shelf, low mid-bass and has some elevated sub-bass. Doesn’t rumble or extend that much and texture is decent. Is pretty fast/tight though. Not for bassheads, but people that like flatter bass will enjoy this.

Mid-bass: Metallica – fight fire with fire (01:11-01:52), very clean due to the fast/tight and low quantity bass, texture is decent. The (02:55-03:01) section with the chopper is very clean and hearable.

Hiroyuki Sawano – Pretenders (01:18-01:47), very clean due to the fast/tight bass but lacking some quantity, decent texture.

Sub-bass: Djuro – Drop that bass (01:15-01:30), Doesn’t extend or rumble that much. Punch quantity is lacking and not a lot of texture, it is fast/tight though.

Will Sparks – Sick like that (03:08-03:22), lacking quantity and texture, pretty fast/tight though.

Mids: Vocals, particularly female vocals are great, they are actually not recessed and a bit forward, very clean as well and tonality is very good. Very unlike the usual KZ mids. Male vocals on the other hand lacks warmth. Timbre is not that good though.

Female-vocals: Hiroyuki Sawano – OldToday (01:25-01:52), Vocal tonality is quite good, quantity is a bit forward (although it could be more forward), clean but timbre is a bit off. Instrument tonality lacks warmth and timbre is not that good, is clean though.

Yuki Hayashi – MightU (01:58-02:55), vocal tonality is very good, a bit forward, clean and with decent timbre. Instrument tonality is very good, clean but timbre is a bit off.

Evanescence – Bring me to life (01:18-01:35), vocals aren’t shouty, but the treble is sibilant.

Hiroyuki Sawano – Crescent (02:07-02:26), shouty vocals and very sibilant treble.

Male-vocals: Hiroyuki Sawano – Pretenders (00:57-01:17), vocal and instrument tonality lacks a bit of warmth, clean though but timbre is not that good.

Hiroyuki Sawano – Scapegoat (00:57-01:17), Both vocal and instrument tonality needs to be warmer and timbre is not good, is clean though.

Treble: Linkin Park – Shadow of the Day (03:24-03:42), electric guitars are sharp and fatiguing. Timbre is not that good.

Deuce – America (03:03-03:16), sibilant treble, very fatiguing and chaotic. Nearly unlistenable.

Hiroyuki Sawano – Lose (string version) (01:22-01:59), Cello tonality lacks warmth and timbre is not that good is textured and clean though. Violin tonality is quite good and clean, but timbre is not that good and treble-extension could be better.

Hiroyuki Sawano &Z (02:18-02:57), tonality is too bright, timbre is a bit off but is clean.

Soundstage: wide soundstage, average depth for this price range though.

Tonality: U-shaped, timbre is not that good though although the coherency is pretty decent. Note-weight is a bit on the thinner side.

Details: Macro-detail is good but not a lot of micro-details.

Instrument Separation: Separation is pretty good (helped by tuning), imaging is average.

Songs that highlight the IEM: https://www.youtube.com/watch?v=QtXNvoPfO84 https://www.youtube.com/watch?v=L17S9SYRzQY

Good genres: Acoustic/vocal, OST

Bad genres: EDM, Hip-hop, Trance, Rock/metal, (avoid badly mastered tracks!)

Comparisons:

IEM: KZ DQ6 (high-density tuning foams), Elecom EHP-CAP20 tips L, cable A3 4.4mm

Bass: Djuro – Drop that bass (01:15-01:30), extends lower and rumbles more on the DQ6. Punch quantity is higher and more textured, a bit faster/tighter on the ZP. More tonally correct and better timbre on the DQ6.

Hiroyuki Sawano – Pretenders (01:18-01:47), quantity is higher on the DQ6 and more textured, cleaner (faster/tighter) on the ZP but lacks quantity in comparison. More tonally correct and better timbre on the DQ6.

Metallica – fight fire with fire (01:11-01:52), Cleaner on the ZP because of the lower bass quantity and faster/tighter bass, but more textured on the DQ6.

Mids: Hiroyuki Sawano – OldToday (01:25-01:52), vocal tonality is better on the ZP and more forward, similarly clean and detailed but better timbre on the DQ6. Instrument tonality and timbre are better on the DQ6, similar detail.

Evanescence – Bring me to life (01:18-01:35), a bit shoutier on the DQ6 but sibilant treble on the ZP.

Hiroyuki Sawano – Scapegoat (00:57-01:17), Vocal and instrument tonality are a lot better on the DQ6 as well as more natural timbre, similar detail but cleaner on the ZP.

Treble: Linkin Park – Shadow of the Day (03:24-03:42), electric guitars are sharper on the ZP, better timbre on the DQ6.

Hiroyuki Sawano – Lose (string version) (01:22-01:59), Cello tonality, timbre and texture are a lot better on the DQ6, similarly detailed but cleaner on the ZP. Violin tonality and clarity are better on the ZP but similar treble-extension and detail while timbre is better on the DQ6.

Hiroyuki Sawano &Z (02:18-02:57), more tonally correct on the DQ6 as well as better timbre, cleaner on the ZP but similar detail.

Technicalities: Shiro Sagisu – Hundred years war (02:24-02:57), a bit wider and a lot deeper on the DQ6. Detail is similar but better separation and imaging on the ZP. Timbre is better on the DQ6.

Overall: Get the DQ6 if your library is similar to mine. Get the ZEX Pro if you want a more balanced tonality but be aware of the 8k peak (fixable with EQ but not with physical mods).



IEM: Blon BL-03 (mesh mod), Radius Deep Mount tips L, cable B3 4.4mm

Bass: Djuro – Drop that bass (01:15-01:30), extends lower and rumbles more on the 03. Punch quantity is higher, similar texture but cleaner due to the faster/tighter bass on the ZP. More tonally correct and better timbre on the 03.

Hiroyuki Sawano – Pretenders (01:18-01:47), cleaner on the ZP due to the lower bass quantity and much faster/tighter bass, similar texture. More tonally correct on the 03 and better timbre.

Metallica – fight fire with fire (01:11-01:52), much cleaner on the ZP due to the much faster/tighter bass along with a lot less quantity, a bit better texture on the 03.

Mids: Hiroyuki Sawano – OldToday (01:25-01:52), vocal tonality is similar but much better timbre on the 03, a bit more forward on the ZP, cleaner and a bit more detailed on the ZP. Instrument tonality and timbre are a lot better on the 03, but cleaner and more detailed on the ZP.

Evanescence – Bring me to life (01:18-01:35), a bit shoutier vocals on the 03, but sibilant treble on the ZP.

Hiroyuki Sawano – Scapegoat (00:57-01:17), Vocal and instrument tonality and timbre are a lot better on the 03, cleaner and more detailed on the ZP though.

Treble: Linkin Park – Shadow of the Day (03:24-03:42), electric guitars are sharper on the ZP, better timbre and more tonally correct on the 03.

Hiroyuki Sawano – Lose (string version) (01:22-01:59), Cello tonality, texture and timbre are better on the 03 but cleaner and a bit more detailed on the ZP. Violin tonality is a bit better on the ZP with better clarity and treble-extension but much better timbre on the 03.

Hiroyuki Sawano &Z (02:18-02:57), more tonally correct and better timbre on the 03, but cleaner and more detailed on the ZP.

Technicalities: Shiro Sagisu – Hundred years war (02:24-02:57), a lot wider on the ZP but deeper on the 03. Imaging, separation and detail are better on the ZP. Much better timbre on the 03.

Overall: The ZP is the more technical iem, while the 03 has better timbre. Get the 03 if you have a library similar to mine or the ZP if you want something more balanced.



IEM: CCA NRA, Sony EP-EX11 tips L, stock cable 3.5mm
Bass: Djuro – Drop that bass (01:15-01:30), similar extension but more rumble on the NRA. Punch quantity is higher on the NRA similar texture but a bit tighter/faster on the ZP. A bit more tonally correct and slightly better timbre on the NRA.

Hiroyuki Sawano – Pretenders (01:18-01:47), more quantity and slightly more textured on the NRA, faster/tighter on the ZP. More tonally correct on the NRA and better timbre on it.

Metallica – fight fire with fire (01:11-01:52), cleaner on the ZP due to the lower bass quantity and tighter/faster bass.

Mids: Hiroyuki Sawano – OldToday (01:25-01:52), vocal tonality is a bit better, cleaner and better timbre on the ZP as well as a bit more forward. Instrument tonality is better on the NRA but better timbre and cleaner on the ZP. Similar detail.

Evanescence – Bring me to life (01:18-01:35), more treble sibilant on the ZP, but slightly shoutier vocals on the NRA.

Hiroyuki Sawano – Scapegoat (00:57-01:17), vocal and instrument tonality are better on the NRA, similar detail and timbre though but cleaner on the ZP.

Treble: Linkin Park – Shadow of the Day (03:24-03:42), electric guitars are brighter and more fatiguing on the ZP, a bit better timbre on the NRA.

Hiroyuki Sawano – Lose (string version) (01:22-01:59), Cello tonality, texture and timbre are better on the NRA similar detail but a bit cleaner on the ZP. Violin tonality is better on the ZP, similar detail, treble-extension and detail.

Hiroyuki Sawano &Z (02:18-02:57), better tonality and timbre on the NRA,

Technicalities: Shiro Sagisu – Hundred years war (02:24-02:57), similar width but a bit deeper on the NRA. Imaging and detail are similar but better separation on the ZP. NRA has a bit better timbre.

Overall: They have similar technicalities, but the NRA is tuned better and with slightly better timbre to me.



Conclusion: I honestly can’t really recommend this, the issues that the 8k area is causing is a big dealbreaker, timbre is off and upper-treble air is really lacking. Doesn’t help that the technicalities are on the same level as the cheaper KZ´s.

Of course, if you can use PEQ, pretty much all my issues with the tonality (and some of the timbre) is fixable. The rating with PEQ would instead be a 4.5/5:

Peak: 4200hz, Q: 2, gain: -3db
Peak: 7000hz, Q: 5, gain: -3db
Peak: 8000hz, Q: 3, gain: -5db
High-shelf:11 000hz, Q: 0.7, gain: 3db

Graph:


Cable source:

https://docs.google.com/spreadsheet...zTm4ei7HEfP8AI1zxswrMw2ho/edit#gid=1801072063

Reference/test songs:

DISCLAIMER:
The ZEX PRO was sent to me by linsoul in exchange for an honest review. No monetary exchange took place. This is 100% my honest opinion.


Link to buy:
https://www.linsoul.com/collections/all/products/kz-x-crinacle-crn-zex-pro


Official website of KZ:
https://www.kztws.com/


Technical Specification:

IMPEDANCE: 16Ω
SENSITIVITY: 104dB
FREQUENCY RESPONSE: 20Hz - 40KHz
CABLE LENGTH: 1.25M
PIN TYPE: 2-PIN QDC-TYPE CONNECTOR
PLUG TYPE: 3.5mm
DRIVER UNITS: 1 DYNAMIC DRIVER, 1 MAGNETOSTATIC AND 1 BALANCED ARMATURE DRIVER.


Sub-Bass:

The sub-bass is clean-sounding and decently rumbly making it detailed but not aggressive. Sub-bass has a tint of warmth and has a decent reach in terms of extension.


Mid-bass:

The mid-bass is well-textured and clean thus giving a satisfactory thump and slam for the bassdrum.

Mids:

The mids sound great and soothing. The piano is well-present and has a rich and lucsious ambience. Vocals sound natural and textured. Guitars are detailed and strums are soothing.

Treble:

The treble sounds sparkly but not too bright. The treble is also peaky in some tracks and overall on the brighter side. Treble also decently detailed.

Sound-Stage and Imaging:

The sound-stage is pretty intimate which is like being in a smaller than average bedroom. Imaging is decent as the positions of the instruments can be located well. But due to the intimate stage, the instruments are congested and narrowly spaced. Seperation and imaging between instruments are ample and are able to distinguish between each instrument pretty well.

Verdict:

The zex pro is a well-valued IEM at this price range and it is honestly a solid pick. It has good detail retrieval, solid mids and rumbly and thumpy bass. Although the stage is pretty intimate and the treble might be a bit bright for some, the overall listening experience is relaxing and clean. I would definitely recommend this pair as you can't find anything like it at this price point. ($33.99usd)




For reference, you can check my Youtube video here:

​

KZ x Crinacle CRN(ZEX Pro)
Relaxed tuning with great mids
V shaped/U shaped
KZ x Crinacle CRN(ZEX Pro)
is KZ's new offering after their release of the warm welcomed ZEX.
In this review the
KZ x Crinacle CRN(ZEX Pro) will be addressed as ZEX Pro.
ZEX Pro indeed bring new things to the table and can be owned side by side with ZEX. This is not just an upgrade but a totally different iem signature focus.

Disclaimer: The test unit of this review was provided by KZ earphones in return for an honest review of the ZEX Pro. All of the impressions on this review is mine alone. Your experience with the iems may vary with the conditions you will subject it into.

Fit, Design and inclusions
ZEX pro comes with a metal plate stamped with the KZ Logo. the underside is a tinted resin like material that shows the insides of the iem. the fit is great, it is flush and comfortable. It is light and can be forgotten that you are wearing one. The design is beautiful with the KZ logo on emphasis on top and a demonstrator style view from the undersite. The wire included is ok. Similar to those that is supplied with ZEX and CCA CA16 Pro. The tips are starline tips which performs well with the ZEX Pro. You can change the tips as for your preference but out of the box ZEX Pro is already good.
4/5

Bass
The bass region of ZEX Pro is on a weaker side this time. The sub bass has presence but not very heavily implemented, carrying a "just right rumble" to present the sub bass. The midbass has a good body, weaker but has enough hardness in its presentation. It is not imposing making the pair sound natural and relaxed. Both are well controlled and can still be satisfying. Overall, I could say that bass is not the main attraction of this pair. This iem is not for bass heads or those who look for deep rich bass. Although applying different tips can boost the bass, but it will not change much.
3.8/5

Mids
Despite being a V shaped pair, the mids of the ZEX Pro are excellent for the price. It is clear, and dynamic without being offensive. Voices sound natural for both male and female. It gives an impression of perceived feelings with the presentation of the texture of the voice keeping the luscious ambiance created by Anri's voice or the relaxing summer vibes produced by Junk Fujiyama voice. The stringed instruments have great presentation. The sound of the piano has a soft caress feel while keeping the ample presence. The guitar is clear and has ample ring to represent the instrument properly. Some other instruments such as the shamisen being used in some wagakkiband's tracks also captures the right vibe which makes these pair truly enjoyable. Although when compared with higher priced iems, ZEX Pro still has room for improvement I would say they are great at this price point
4.5/5

Highs
The treble area of the ZEX Pro is well controlled. the sparkles, hisses and strikes on treble region instruments are present but never offensive. Brass instruments such as cymbals and hihats are present and clear. They are rendered naturally, with slow decay, it has enough body to present itself without sounding like a can while keeping the peaks in check. The trumpet peaks on you've got to have freedom isn't offensive but is well represented. the flutes on wagakkiband's sasameyuki sounded smooth.
4.5/5

Soundstage, Clarity and Layering
Soundstage is average. The pair sounded like a studio/auditorium setting with the music at the front opening horizontally. While the clarity is great but these pair are non-tolerant on bad tracks. The layering of ZEX Pro is also on the average side together with its separation. Although some of these could be adjusted by tip rolling. For this price I don't consider these as cons for the iem. Yes, there is room for improvement compared to other iems but that will also increase the price.
4.2/5

Overall ZEX Pro is a great starting iem. Signature wise I would get the ZEX and the ZEX Pro as they have different flavors of focused area. Then added with the low price of these iems they are indeed beginner friendly or if you're just looking for a great sounding iem without breaking the bank.
Overall score: 4.3

If you are interested you can get them here:
https://bit.ly/30yBi3c
You can also find these at this website.
https://www.kztws.com/products/zexproxcrinclecrn

Hi guys, this is my full review of the KZ ZEX-PRO. This unit was sent to me my KZ. Rest assured my impressions are not affected by the generosity of KZ. I am not a professional reviewer, but I have heard of some expensive IEMs in the place where I am at. My impressions might not match your preference because this is a subjective hobby. But I will try my best to be accurate and unbiased as possible.

SETUP:
-Shanling M3x
-TRN T2 16 core cable 4.4 bal
-Sony EP-EX11 tip, random wide bore tips
-Hiby player

SOUND PROFILE
These are fairly balanced with subbass emphasis. Bass is not bloated, and it does not bleed to the mids. Mids are not that recessed but lacks the overall clarity. Treble can be peaky with the wrong tips and cables. Enough sparkle, but not airy enough for upper harmonics. Timbre is near natural but never metallic nor dark. Soundstage is very wide for my ears, but not deep and has an average height. Surprisingly above average technicalities like the layering, imaging, positional cues and separation. Very good tuning for my preference, but can be dry sounding, lacking enough bite and aliveness to a track.

SHOULD YOU BUY THEM IF YOU ALREADY HAVE THE ORIGINAL ZEX?

It depends. If you find the bass of the OG ZEX to be bloated for your taste, you might like this presentation. However, if you already like the OG ZEX, then you might find the midbass punch to be lacking for your taste.

WHY WOULD OTHERS BUY THE ZEX-PRO?

Because for me, it is the most balanced tuning KZ has made. In this price range, you rarely see sets that are tuned like this. I’m sure you have already seen ZEX-PRO graphs being compared to more expensive IEMS like the B2D and monarch. But hey, the ZEX-PRO does not sound like them. Tuning wise, quite similar, but the experience is different. To give an analogy, it is like watching a slipknot concert on youtube, as compared to being there. Same music, same sound mix, different experience.

PROS

✔nicely done subbass.
-In the track “nice to know you” by Incubus, the subbass at the intro bassline is so good. It rumbles and reverberates, and never bleeds anywhere.

✔speedy lower transients and attack
-In Yorushika’s “burglar”, the bass slaps are so quick, and punchy. The decays are just enough to fill your bass desires. Feels like Davie504 hitting my throat with those bass lines lol

✔Very good technicalities like imaging, layering and separation.
-The wide stage can be a pro to some especially for monitoring and games. This might be the star of the show for ZEX-PRO
-In the track “blue” by YOASOBI, the male tenor voicing around 0:30 is so well layered and separated.

-Another track from Yorushika, “church in the forest”, the positional cues of the bird sounds are unbelievably accurate.

-the panning of the synth effects of YOAOBI’s “tsubame” is very good. Left to right accuracy of positional cues are very well done due to its wide staging.

-In Reona’s “Anima” at 1:50, guitar imaging and separation is surprisingly good for the price. You hear the rhythm in the background with enough clarity that is never mixed with the other instruments.

-Coheed and Cambria’s “Eraser”, this tribid setup, especially the electret driver, gives a different flavor of layering. I can pick up which cymbals are simultaneously hit.




CONS


Although the treble can be sparkly, it is sometimes rough for my taste. It is not smooth
-I’m sure you know Taylor Swift. In her track “I know you were trouble”, at 3:00, those synth effects can be unbearable for me. It is the same with “Sick Sad Little World” by Incubus, during the instrumentation bridge at around 4:00, the cymbal strikes are not so defined, and it can be really piercing for someone like me who is sensitive to that 8k region.

-In the track “firs of summer” by Urbandub, the cymbal strikes also sounded digital. It lacked the overall extension of splashes.

Mids lack body and clarity
-The mids are forward in the overall presentation but it actually lacks resolution. The cymbals in the track “idiot box” by incubus sounds like tambourine LOL.

lack of upper harmonics
-the intro guitar riff of “psychosocial” by slipknot was very satisfying with Heart Mirrors. But for the ZEX-PRO, it just lacked the additional bite and detail in that region. It lacked the resonance.

Timbre can be dry sounding
-Although it is balanced in tuning, it might not be engaging for some. One of the instruments I am very keen on is the snare drum. If the snare does not sound right, I can guess how an IEM would sound. The snare of the track “magic medicine” by Incubus, sounded so dull.

Detail retrieval is average
-at around 0:34, you can hear drumstick counts from the track “unwell” by Matchbox twenty, and the ZEX-PRO was not so good at retrieving those counts. There are three counts on that track, and if you can hear those three clearly, then I say a set is good at retrieving details.

FOR COMPARISONS, YOU CAN CHECK MY YOUTUBE VIDEO HERE:



FINAL THOUGHTS:

THE KZ ZEX-PRO is a budget set, tuned for people who has a matured taste in music. I’m not saying that people who like bass are inexperienced, it is just that, most beginners like bassy sets. But the caveat is, if you have already been in this hobby for a long time, chances are, you are already aiming for more expensive and refined IEMs. KZ ZEX-PRO nails a matured tuning but lacks the finesse of more expensive internals, drivers and BAs.

I could have given the ZEX-pro 4.5 or 5 stars if it was not for the 8k peak. Many people might be fine with it, but I cant just have long listening sessions with them without turning down the volume.

It is good for beginners who want to transition their tuning preference and taste, or just want to try a different tuned IEM.

It is also good for people who want a near “harman” tuned IEM without breaking their wallet.

The ZEX-PRO is a double-edged sword, KZ fans might not welcome this new approach,

but for some, it may be a gateway to taste what an expensive IEM would sound like in terms of tuning.

Where to buy:

https://www.aliexpress.com/store/910329131

https://kz-audio.com/

https://shopee.ph/ccaofficial.ph?categoryId=100535&itemId=10962565586

Oi mates! and welcome to my another IEM review article. This is my Yuletide season post, Thank you for your time on reading some my review articles here in Head-fi for the past months.



What I have here is the next reiteration product from Knowledge Zenith on their ZEX series, The KZ ZEX Pro. As we all know that previous ZEX was the first new generation of hybrid drivers as it has a single DD and a magnetostatic drivers but this particular set is a bit different one. KZ added an additional driver, a balanced armature driver, as they try to rectify those inadequacies of the KZ ZEX based from the feedbacks of some reviewers and customers.








If you want to checkout my review on KZ ZEX, click the link below:

http://euphoniareviews.blogspot.com/2021/10/knowledge-zenith-zex-v-is-for-viably.html

KZ ZEX Pro is hybrid set-up IEM with three different drivers. It has a dynamic driver for lows, magnetostatic driver that handles for mids and highs and an balance armature driver as a supplement to improve the mids and highs. The shell that is encapsulates the drivers is made of three sections, a polycarbonate base cavity part, a zinc alloy on its face plate and a brass nozzle. The face plate is very noticeable as its design cues was taken from the previous and recently released products from KZ's sister company, CCA. These particular design were found on CCA CSN, CCA CA24 and the recently CCA CA16 Pro that I’ve previously review before. Good thing that KZ give some choices on its customer to choose a colour on this one as it available in Black, Pearl and Rose Gold (I choose the later colour as I want something new in my collection).





KZ still implemented that 2-pin QDC C-type connector (some of you are already aware on my standpoint on this type of connector). There are also two vent holes on this unit of each shell for escaping excess sound pressure generated by the drivers inside.



The shells are in medium-size as when it comes to fitting of this IEM, they are snugly and comfortable in my medium-size lug holes. The bulge part that holds the cymba concha was intendedly design as a stabilizer to provide more secure fitting.





Just like its predecessor, The KZ ZEX Pro has an identical set of included accessories inside of its white packaging box. The items included are the following:

• A pair of ZEX Pro IEMs.
• A white 4-core SPC parallel cable with 3.5mm L-shape termination jack.
• An extra pair of white tips of different sizes.
• A small quality control card.
• An instruction manual.

KZ ZEX Pro are easy to drive IEMs as they only demand a decent power to power them. Smartphones, Laptops, PCs and other media devices, you named it as how KZ ZEX Pro will easily scaling on those devices.





The tonality of KZ ZEX pro is more of slight V-shape or U-shape tuning. The bass and treble are emphasis and some elevation over mids which stay at bit notch on the audio frequency spectrum. In general, they sound more balanced and an un-KZ tuning that people will notice especially on more familiar on a typical KZ tuning.



Here are some of my observation and description in its characteristics of each audio frequency spectrum.



LOWS/BASS:

The quality of its bass is articulate, punchy and clean. The sub bass has faint presence on the bass region as it shows some decent reach to show at least a gentle rumbling.

Mid bass has a decent texture to give an ample body and weight note on some bass oriented instruments and male vocals. Because of its satisfactory texture, it gives a good thump on bass kicks, a more mellowing yet sustaining bass guitar and a reasonably depth on the bass baritone vocals.



The transients speed is an agile as it is gives sudden decay on its performance.



Overall, bass quality on this one is worthwhile to be consider, not a hint bass bleeds that spells out on the other audio frequency, clean and well-controlled.



MIDS:

The mids are clean, pristine, smooth and translucent but it is still a bit recessed in my preference if I measure it on my mid-centric tonality scale. For sure that vocals are well-done on this IEM as to its more on natural approach rather than being more detail focus.

Male vocals are less prominent than female vocals. I find soprano, falsetto and tenor a bit lacking of that depth, a bit narrow and power but still acceptable to be a good one. Female vocals has at least a decent reach and enough clarity but not the best on resolution as I find it just average but still is pleasant and sweet to hear them.



As for instruments, the percussive like snare drums and congas has that penetrating, precise yet a little bit soft thudding, strings instruments such a guitars and harps has enough crisp and “ringy” tone, I almost forgot to mention that velvety and somehow a vibrant sound of violin and lastly, that mellow and lustrous sound of piano.



For a KZ set, this is one of the crack tuning that I really lauded them on how they try to put an importance on improving the quality of the mids of the KZ. Well-done, just keep improving.


HIGHS/TREBLE:

Treble on this one is more leaning on a brighter side, has a bit lacking of airy extension and just more of an average detail retrieval.

Upper mids/ lower treble has a discernable peak that in some sibilant-prone tracks, it gives a bit an abrupt hissy, noticeable but not the point of being irritating.



Cymbals strikes has a shimmering sound and yet a bit controlled and crammed as it has almost the same muted quality of hi-hats as I really what my cymbals sounds more well-extended as it was sounds more natural and give a scintillating feel.



The treble needs more further improvement in this set but for a price point, it is decent enough.



SOUNDSTAGE, IMAGING AND OTHER TECHNICALITIES:

The width of perceived sound field is just an average to above average, a decent depth and satisfactory height, It is like that you are in small pub with at least a 3 meters of ceiling.


I give a score on imaging performance an above average as I can locate the source of a sound decently in a typical stereo spatial panning. Separation and layering is a just an average as placement and spacing of instruments is a bit narrow that in some multi-instrument complex tracks it gives of a sense of compression and congestion.

Coherency-wise of its three drivers system, they have a good synchronisation as they show the output in a cohesive manner without any phasing issues.



My verdict on this one, That KZ finally stepping off from their comfort zone of a typical V-shape tuning as they try to explore and venture on other possible new kind of tuning that its doesn’t sound redundant compare to their most product. This is so far one of the most balanced, more closer to neutral that KZ's ever produce.

Surely, that it will still take more steps on improving their product's quality on both aesthetics and tuning and I think that KZ ZEX Pro is just an introduction on what KZ products will release in the future.



KZ ZEX Pro is now available to all e-commerce sites and it is currently around $35.00/£26.00.





SPECIFICATION:

MODEL: KZ ZEX Pro

IMPEDANCE: 16Ω

SENSITIVITY: 104dB

FREQUENCY RESPONSE: 20Hz - 40KHz

CABLE LENGTH: 1.25M

PIN TYPE: 2-PIN QDC-TYPE CONNECTOR

PLUG TYPE: 3.5mm

DRIVER UNITS: 1 DYNAMIC DRIVER, 1 MAGNETOSTATIC AND 1 BALANCED ARMATURE DRIVER.





Some 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 *'*



P.S.

I am not affiliated to Knowledge Zenith 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 thank Jeff Yang for providing this review unit, I truly appreciate on his generosity towards me and other reviewers.


If you are interested this IEM product from Knowledge Zenith (KZ), Just check out the link below:

https://www.kztws.com/products/kz-zex-pro

Summary

Budget End Game……oh? you need more?..okay…
The best IEM I’ve own so far, the sound signature is neutral with sub-bass boost you can hear every detail in the music, there’s no discernible frequency that is too much or lacking, everything is laid out naturally. Excellent soundstage and imaging, imagine as if you’re in the studio with the singer, the instruments can be easily pinpointed and has enough note weight to them, it’s like they are physically around. Bass is tight, clean and fast, there’s no mid-bass bleed, rendering vocals with enough definition and clarity, it’s quite lovable. Moreover, I can’t detect any driver incoherency, its smooth as butter for a tri-bid, the three-drivers are all fast making the ZEX Pro quite enjoyable with fast and complex tracks.

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Finally, I’d like to congratulate KZ for this IEM, they really outdone their selves. Thank you for bringing this IEM to the budget section.

Disclaimer

• I like to thank KZ for providing me a review unit of the ZEX Pro.
• Jeff from KZ sent this unit for my honest opinion and assessment.
• Rest assured that this review will be bias-free.
• As always, since our ears have different shapes and resonances, your mileage may always vary.
• You can also visit my site for the nicer version of my reviews: XerusKun Archives
• This review will be quite long, apologies in advance. hehe
• And don't forget to take my review with salt and always cross reference

Preliminary I __φ(．．

• Unlike my other IEM reviews, I didn’t test the ZEX Pro (ZP) for at least 1 week, this is due to the reason that it sounded near perfect for my ears, I love ZP so much that I want to share my thoughts to other people immediately.
• I tested the ZP with Nicehck 8-core OFC cable and Sony-ex 11 tips, cable rolling is a must for ZP, so please before trying the ZP read the Preliminary II first. Cause, I’ve seen some people not enjoying their ZP and I kinda experience the same when I first tried it out of the box.
• My library mainly consists of Japanese music, so if you’re a fan of them like me, then we might have the same taste. I also listen to various genre like hiphop, rap, orchestra etc. but not that often compared to the Japanese ones.

Preliminary II __φ(．．
My experience with ZP is a roller coaster, out of the box (stock cable and eartips). ZP sounds lifeless, un-engaging and flat. I tried to understand its signature for an hour but I just can’t seem to like it. The sound is hazy, peaky and just MEH out of the box, its like I’m missing something. I also thought that the OG ZEX is better than the ZP at that point (like what other users also reported in Facebook).
However, as I replace the stock cable with my Nicehck 8-core cable, magic happens…everything became vibrant, dynamic and engaging while also retaining the neutral signature, like what?? Am I still listening to ZEX Pro?? With that I recommend the buyers of the ZP to do the following.

• Change the stock cable and throw it in the trashcan (just kidding..hhahaa), treat the ZEX Pro with love and it will sing with poise and finesse, put a nice cable to it, any high-quality cable will work 4-core, 8-core or even 16-core (I highly recommend a Nicehck cable).
• If the upper treble is somehow peaky specially at the 8kHz region, use narrow bore tips like Sony EX-11 to reduce it. Wide-bore will intensify that region but will also give more sparkle to ZP, the choice is yours.

Epilogue to Preliminary II ___〆(・∀・)

(This section will contain a lot of hopium so skip this part if you don’t want to hear some BS. However if you’re interested with my experience then continue reading..)

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After my honeymoon with the ZP, I’ve tried to test the stock cable again and from that something bizarre happen. I can’t detect any differences between my stock cable and my 8-core cable anymore, like wth. My theory (take this with a bucket of salt) is that the 8-core cable energizes something in the ZEX Pro that makes it sound more dynamic and energetic, like the stock cable is not enough to drive that certain driver. I think, the driver in fault is the magnetostat driver, it seems that the stock cable can’t charge it properly making the out of the box experience kinda MEH since there’s no dynamics and energy that should be provided by the fast magnetostat, I think the 8-core cable awakens the magnetostat making the ZEX Pro dynamic and just plain amazing. After waking up the magnetostat you can use any cable you want even the stock one.

My Target Sound Signature
My target sound is the ZEX Pro…ahhh. I mean I like IEMs with neutral leaning to bright or Harman 2019 signature. However, V-shaped or U-shaped will also work as long as there are sufficient technicalities. Congestion, bass bloat, and muddiness are a big no for me.

Equipment

• Avani DAC (Realtek ALC5686)
• Samsung Galaxy Note 9
• CX-31993

Thy Frequency Spectrum
This is the best IEM I have tried to date, if this is what TOTL tuning is, then thank you very much KZ-sama for bringing this blessing to us, peasants. That’s it! No introductions needed for this part.

Bass: 5/5
Fast, clean and tight, midbass bleed is non-existent. Bass rumble is still audible and isn’t overtaking any of the melodic frequencies. Bass is also full of texture, the tapping of the drums, bass riffs, kick drums, etc. like every instrument that lies within the bass region is clearly audible, defined and replayed with poise. This is the cleanest bass I’ve heard in an IEM so far. Superb.

Midrange: 5/5
I’m in love with how ZP portrays the midrange, like the fundamentals of the instruments are clearly defined and nicely weighted. Like they are physically within my headspace, I’m exaggerating but to me it feels like I can touch them. The vocals…hmmmm..how can I describe the vocals….its freaking fantasticccc!!! I can’t…..am I listening to a KZ IEM anymore? The male and female vocals are just replayed with smoothness, nuance, weight, naturalness and sparkle, like everything I want with the vocals is portrayed by the ZP, the vocals are also not too forward nor recessed, like wth. If I have to nitpick, the female alto voices needs more push since they are kind of recessed, but for the asking price this type of midrange performance is in another level.

Treble: 4.75/5
Organic, natural and sparkly. The lower treble is tuned so well that I can’t detect any harshness in the treble region, instruments like piano and strings are not that bright like Heart Mirror but still properly nuanced and is very detailed. ZP also has enough 10k above energy to contribute to its wide staging. I didn’t rate it as high as 5 since there’s a peak at 8kHz making cymbals crashes unnaturally forward at times. Fortunately, the 8kHz peak can be reduced with a narrow silicon eartips like Sony EX-11.

Technicalities

• The coherency between the Magnetostat, Dynamic and Balanced armature are quite smooth; truth to be told I can’t detect where the BA actually plays in the frequency spectrum, like is it even turned on? There’s still a magnetostat flavor but not as noticeable as the ZEX.
• Soundstage is impressive and feels so natural, imagine as if you’re in a studio with the artist, the stage has an above average height and width, while the depth is below average. It isn’t holographic like what other people may prefer, but it’s so natural and real…. like this soundstage is something you will only hear in higher end gears.
• Separation is superb. Instruments have their own space in that natural soundstage and is portrayed with physicality. Instruments are easy to pinpoint while vocals are centered. Instruments does not bother the vocals whatsoever and each music element has their own space in that wide soundstage. If you’ve watched a live band performing, the experience is kind of the same.
• Driver speed is fast, like real fast. ZP can handle my complex metal and trance songs with finesse and accuracy like what? I can’t detect any congestion even with the bass hitting as hard as it can, vocals are still clear and well-defined.

The Radar Chart

The charts below show how ZP performs, this is still a subjective approach but the chart can give you a bigger picture of what you're trying to purchase. Moreover, the chart only takes into consideration all of the IEMs I have tried so far which is around the price range of $10 to $80. If you want to see a comparison to higher priced gears kindly check other reviews.

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Music Analysis


1. Pale Blue by Kenshi Yonezu (Played in Tidal Masters)
[Male Vocals, Staging, Imaging]
Kenshi voice at the start is so weighted and feels so real. The “zutto” is quite sharp in some iems like Heart Mirror but reproduced quite naturally by the ZP. The piano at 0:15 is so detailed and nuanced, I can’t detect any over-sharpening or harshness, the instruments are also placed properly on that wide stage and I can easily differentiate each of them. The fundamentals of the drums, piano and guitar throughout the track are so natural, it feels like I can touch them. Moreover, Kenshi’s voice throughout the track remain poise and finesse even with the hard-hitting bass appearing frequently in the track. Amazing Replay.
Replay Rating: Superb


2. The Clouds and the Ghost by Yorushika (Played in Tidal Masters)
[Female Vocals, Staging, Harmonics, Bass Response]
One of the tracks that made me fall in love with ZP. The replay is quite unreal. The clock, chime, bells, guitars, gentle whisper and water droplets at the start and throughout the track feels so real, like I can clearly locate them one by one without any efforts at all, plus the harmonics (echoes) decays so naturally like arrggghhh,, its so beautiful. Don’t forget Suis’ voice, it’s not that sharp like Heart Mirror but, like, it’s very natural I can’t explain it, I freaking love how ZP plays this track, I’m speechless……
Replay Rating: Superb


3. Afire Love by Ed Sheeran (Played in Tidal Masters)
[Male Vocals, Stage, Treble Quality, Bass]
The piano arrrghhh, so beautifully portrayed by the ZP, like the attack of the piano keys, the decays I can clearly hear them. The lower frequency instruments like drums and bass guitar also retains its tightness and cleanliness throughout the track, very good punch and texture. Ed Sheeran’s voice is also lovely, it never feels lean or lacking, it’s quite emotional to say the least. The staging of this track is also quite good, it feels like I’m in the studio where Ed is singing in front of me and the instruments are placed around me. The violin also sounds so natural like, it never feels too sharpened or too muted. Again, another superb replay by the ZP.
Replay Rating: Superb


4. Sololique by ShibayanRecords feat Milka (Played in HibyMusic)
[Female Vocals, Treble Quality, and Imaging]
The..the piano again…like it’s so detailed I can’t explain it… And also daamnn, Milka's voice in this track is soooo natural. Quite in-love with her voice like arrrghhhh. The bass is also textured and clean, it rumbles but it does not overshadow the melodic frequencies. Moreover, the stage in this track is also wide but not too wide like CA16 Pro. The flute, drums, and piano are weighted and nuanced and like they are physically within the stage. The macrodetails and dynamics are just unreal…Why does it feel like I’m watching a studio performance, like what the….No comment, I can’t explain it even more…
Replay Rating: Superb


5. Binary Star by SawanoHiroyuki[nZk] feat Tielle (Played in HibyMusic)
[Guitar Timbre, Female Vocals, Treble Quality, Staging]
Come on ZP, you can’t do this to me, its already the 5th track like why can’t you stop being too good like wth?! The starry night atmosphere at the start is so detailed and clear, the fundamental details of the guitars and piano are so good and properly nuanced..The vocals are properly weighted and has enough sparkle. The bass remains clean even if the kick drums hit so hard…and..and..This is just witchery at this point. ZP needs to be stopped.
Replay Rating: Superb


6. Just Be Friends by prkr feat Nagi Yanagi (Played in HibyMusic)
[Guitar Timbre, Female Vocals, Lo-fi Test]
The replay is still acceptable, the guitars and cymbal crashes are still rendered wonderfully with details, even if the track has a foggy atmosphere to it. Nagi’s voice remains controlled throughout the track and does not show any harshness or shrillness whatsoever. The drums and bass guitar are still quite punchy and detailed even if the mastering is not that clean. However, the cymbal crashes are too much with the stock tips, with sony ex-11 its quite bearable.
Replay Rating: Excellent


7. Camomille Moody Afternoon by ShibayanRecords (Played in HibyMusic)
[Timbre, Imaging, Staging]
The ultimate test for timbre, staging, and imaging by the legendary ハム (Hamu). This the first KZ that I’ve tried that handles this track with naturality and finesse. The instruments are so natural-sounding I can almost touch them. The warmish atmosphere is also fantastically portrayed by the ZP, it feels so real….. like the instruments never mushed together instead they have their own spaces/layers on the stage and just blends wonderfully to create a fantastic melody. The bass also retains its tightness and somehow rumbly nature while being clean and poise. The upper frequency instruments also sound so detailed and clear, there’s no harshness or over-sharpening happening, quite unreal replay by ZP. Can’t explain it even more. This is an END Game material for my music taste, it’s a bold statement, I know, but this ZP is just in another league, it does not belong to the $35 range truth to be told..
Replay Rating: Superb

Comparison
ZEX Pro vs ZEX
These are two different beasts; one will give you clean and natural replay while the other one will give you a unique warmish flavor to your music. As for me I like my music to be as natural as possible and that’s why I liked Harman tuned iems, the unique warmth that the OG ZEX provides is just unnecessary for certain type of tracks. ZEX Pro is just cleaner, more natural and lovable to listen to. ZEX Pro also portrays my library so well that its quite unreal. OG ZEX in my opinion only works for certain genres and the midbass bloat is just quite irritating sometimes. For this reason, ZEX Pro wins, because of my library and how I like my music to be replayed.

ZEX Pro vs CA16 Pro
Finesse vs Fun. If you want an upgrade to the KZ sound signature or you’re one of the persons who like bassy energetic sound, just go for the CA16 Pro and be contented. However, if you’re like me who like poise and naturalness in their music, then look no further and buy the ZEX Pro, it’s a no brainer for people who like to hear the proper tone of the instruments. ZEX Pro wins.

ZEX Pro vs Blon BL-03
BL-03 is already obsolete when the Heart Mirror arrives, the only thing that the 03 has is its timbre and natural midrange. However, ZEX Pro takes that timbre and refine it even further while also giving you above average technicalities. No competition. ZEX Pro wins.

ZEX Pro vs KZ EDX
Same comment with the CA16 Pro, if you’re tight in budget and you need a bassy energetic set just then go for EDX, it still has that KZ DNA. ZEX Pro is nothing like the other KZs, its tuning is made to replay music as natural as it can be while also retaining the staging of their old offerings. ZEX Pro wins.

ZEX Pro vs Heart Mirror
This is the hardest decision I have to make, I love both of them, but I’m leaning more toward the ZEX Pro, like think of ZEX Pro as a refined Heart Mirror, with lesser upper treble energy and sub-bass extension. Like all of the things I want in my Heart Mirror is already in the ZEX Pro. However, HM still has that sparkle and enticing female vocals that’s just hard to ignore. The thing I hate with my HM is that it sounds thin in some genres like rock and lo-fi tracks, and the instrument fundamentals are not portrayed properly at times, like its weightless and just harmonics.

Unlike HM, ZEX Pro balances the female vocals and makes it more natural and weighted, male vocals are also a delight compared to HM. ZP is also friendly to all genres unlike HM. There’s also a proper sub-bass boost with the ZP which is lacking in the HM.

Overall ZEX Pro is just an anomaly that crushes the HM in some areas. With the improvements that ZP provides I’m kind of wanting its signature more compared to HM. Let’s just use the analogy that HM just became the girlfriend of the ZEX Pro. ZEX Pro wins.

Mods
Treat the ZEX Pro with a nice cable and it will show you its prowess immediately. Any high-quality cable will work, just please treat him right and he will give you the sound that you want. For the tips, listed below are the ones I’ve tried.

1. Sony EP-EX11
Best eartips for me, removes the 8kHz peak while retaining the neutrality of the ZP.

1.5. KZ ZEX Default Eartips

Seen someone saying that the 8kHz peak can be offset to 10kHz by deep inserting the IEM, the default ZEX tips does that.

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On par with 1, but brighter by a bit.

2. Generic White Wide Bore Tips
Will give ZP more sparkle, however 8kHz will became more intense. Kind of recommended if you think that ZP lacks clarity or sparkle.

3. KZ Starline Tips
Average, shows the 8kHz peak, most balanced eartips for the ZP.

4. Reverse Starline Tips
More treble, don’t….

5. Foam Tips
Removes the sub-bass, makes the male vocals leaner, not recommended.

Cables
Any nice cable will work. Just, let the stock cable have its peace.

Source
Stock Smartphone: There’s some fuzziness and the sub-bass are more audible than Avani and CX31193. Staging is also smaller and much more compressed.
Avani (Recommended): The most dynamic pairing so far, cleans out the fuzziness while also providing sufficient details in the vocals and instruments. Stage is also wider and taller by a bit.
Abigail (CX31993) (Recommended): Makes the ZEX Pro separate instruments more distinctly while also having the same stage as Avani.
CX31993: Cleanest pairing, extracts more details from the ZP. Stage is smaller than Avani but sparkles are more nuanced.

Tested Synergies

1. ZEX Pro + Avani (ALC5686) + Sony EP EX-11 tips (The Pleasure Set)
Favorite synergy so far, Avani widens the stage and adds more midrange weight and nuance to the ZEX Pro. Cymbal crashes are still compressed but still passable due to the warmish nature of the source. Very pleasing pairing if you're looking for a smooth and organic sound. Sony EP EX-11 tips also makes sure that the somehow compressed cymbals is tamed down and will not bother you throughout your entire listening session.

2. ZEX Pro + Avani (ALC5686) + OG ZEX Default Tips (The Balancer)
Same with 1, with the OG ZEX Default tips making the tonality a little colder than the sony tips. 8kHz or the cymbals crashes are still subdued but vocals specially male vocals are more leaner than 1. If you think that the ZEX Pro is too sub-bass focused or lacks the bite, this synergy is a good option.

3. ZEX Pro + Abigail (CX-31993) + Sony EP EX-11 tips (Technicalities Enabler)
This is my most recommended synergy if you want more details and separation with your ZEX Pro. Abigail makes the whole ZEX Pro tonality colder than Avani. Bass will be more tight and controlled, highs will be more sparkly and vocals will be less intimate than 1. Moreover, instrument separation will also be more distinct and harmonics will pop out more often than Avani. The staging is almost the same as 1. Sony tips are recommended in this synergy, since Abigail makes the cymbal crashes more defined, sony tips will make sure that cymbals crashes are still palatable even if its compressed.


Recommend Tracks/Genres

1. Anything...except tracks that contains a lot of cymbals and non properly mastered tracks.

Shop Links
Official Website：https://www.kztws.com/products/zexproxcrinclecrn

Overall Rating
S (Currently one of my tops)

See my rankings here : My IEM Rankings

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A (Relative to Price)
Recommended.

Final Words
Hey, thanks for reaching this part! Hope you enjoy the read, even if it is quite long....
Also, I'm so proud with KZ..this..this IEM is just beautiful..

Addendum
Crinacle Treble and Bass Equalization Preset for Wavelet
If you think that your ZEX Pro lacks the treble bite or the cymbals are too thin or it lacks the mid-bass. You can refer to the drive link below to download the converted Wavelet preset (GraphicEQ) for the treble fix and bass boost PEQ recommended by crinacle at official KZ discord.

https://drive.google.com/drive/folders/1nGDUU28HM-A6R364E-kYCY8wnDOHe_nG?usp=sharing



crinaclefix - default treble fix
crinacle fix + palatable air - default treble fix but 12kHz is reduced to 6dB
crinacle fix + bass - default treble fix with bass boost at 150 Hz.

Honeymoon Phase
This is the only IEM, where as soon I insert it to my ears, my dopamine levels immediately go up, because I just can’t believe what I’m hearing, like is this real?? For $35 dollars??? The replay is just so natural I’m speechless….

PS: 3rd Week of using the ZEX Pro, yeap still inlove with it. Superb replay with japanese music with magical or symphonic vibe to it.

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Accessories
Barebone, which is okay since you’ll get a semi-end game IEM. However, I hope KZ release a version with an 8-core cable cause the stock cable won’t cut it.