KZ Zenith

Intro

KZ done it again. They serve us another solid set from KZ after the super cheap KZ Saga. This is the best single driver KZ iem I’ve heard. A balanced-neutral tuned IEM that offers good and textured bass, nuanced and airy midrange and enough sparkle to enjoy this gear.





Disclaimer

I would like to thank KZ for arranging this unit for evaluations. My opinions are unbiased, and I haven't been influenced or instructed to praise these IEMs. Every detail in this review is actual experience made by listening for hours everyday.





Technical Details

Model
Zenith
Pin Type
0.75mm 2-pin
Plug Type
3.5mm
Impedance
41Ω
Sensitivity
128dB ± 2dB
Frequency Response
20Hz - 40kHz
Cable Length
120 ± 5cm
Inside the Box
•Zenith IEM x 1 pair
•Silver-plated cable x 1
•Memory foam ear tips x 3 pairs
•Silicone ear tips x 3 pairs
•Tuning lever x 1
•Premium storage bag x 1
•Warranty card x 1
•Exquisite packaging box x 1




Build and Comfort

This is a open back design in ear monitor that uses a metal material in body and faceplate ensuring good durability, to be honest the Zenith is the most unique design that KZ made. Comfort wise, it fit like a glove, due to its metal body this has some weight and can cause discomfort in some ears in long listening sessions.


Drivability

This is a single DD In ear monitor I found it lack dynamics when paired with weak sources like phone. Giving this enough juice will show the true performance of these zenith.


Paired with Onix Alpha Xl1

It open up the vocals while smoothening the midrange and treble.

Paired with Fosi Audio ZD3 and Boaleco PX2 Tube Amp

It offers better low end response and better technical performance due to more power output.





Sound Aspects


Source used :


IQOO Neo9s Pro
Onix Alpha XI1
Fosi Audio ZD3
Boaleco PX2 Tube Amp


This iems spend 40-50 hours of burn in using pink noise before taking details of this review

The Zenith has balanced sound profile means that theres no dominant frequency in the spectrum. But wait? it doesn’t mean that these Zenith lacks enjoyment to the user. When paired by a decent amp it exhibits clean low end, nuanced midrange and non offensive treble.


Bass

The low end presents clean and textured response but it doesn’t go deep. It has enough slam depends on the tracks is played. The subbass doesn’t shows long and thunderous rumble just enough to present the bass what it is, nothing is special here except when I used these to my ZD3 and PX2 combo it improved the low end a bit with engaging and meatier slam.


Mids

The airy and nuanced mids of Zenith it reminds me of the midrange of ZS10 Pro 2, it remains transparent while delivering open and detailed vocals. Midrange timbre is excellent for the price. It doesn’t sound metallic which is great. If you’re using these on weak sources you will find it relaxed in vocal section.


Treble

The treble is airy, detailed and non offensive. You can listen to these for hours without sign of fatigued. It has decent treble extension for the price. One thing I want to point out is the treble have occasional thin note weight based on tracks played. Overall, it is resolving, great and fun.


Technicalities

This is where it excels. It offers excellent technicalities for the price. To be honest I really enjoying watching live performances using these Zenith because of its excellent imaging and spacious soundstage when driven properly, Instrument separation is average in quality but with a decent amp it improved a bit.





Conclusion

KZ’s recent releases of IEM have decent performance. Zenith is one of them, from clean and textured bass, detailed midrange and smooth and inoffensive treble also considering the build quality made of metal I suggest to prepare a decent amp to open up its driver a weak sources hinders its performance. I easily recommend these Zenith for those people seeking for chill listening session, sufficiently good performance and durable build that last. Recommended!



Non affiliated link below :
https://www.kztws.com/products/kz-zenith

KZ ZENITH REVIEW: THE BEST OF THE ZENITH​

PROS:​

• The most refined KZ single DD
• Good unboxing experience and accessories
• Unique design
• Premium construction
• Neutral to balanced sound
• Versatile tuning
• Good technicalities for the price
• Great reference KZ set

CONS:​

• Crappy stock cable
• Not the best quality eartip selection
• Occasional electric zaps when paired with a high powered amp
• Not the most exciting IEM
• Not the smoothest treble presentation
• Not class leading in terms of technicalities

WHO THIS UNIT IS FOR:​

• People who want the best single DD KZ
• People who like a reference neutral tuning
• People who like a well-built IEM
• People who want a versatile sounding IEM

WHO THIS UNIT ISN’T FOR:​

• Treble sensitives
• People who don’t like QDC connectors
• People who want a more fun and exciting set’
• People who want the most technical IEM for the price

RECOMMENDED GENRES:​

• Vocal pop
• Jazz
• Funk
• Modern Pop

SHORT REVIEW:​

KZ’s “flagship” single DD finally means something as Zenith achieves what the D-Fi aimed to achieve 2 years ago. Well-balanced KZ “neutral” sound signature with an actually compelling unboxing experience, solid build and a solid technical performance that allows for it to compete with its single DD peers. While it can’t totally compete with the single DD gods, you can’t deny that KZ have considerably improved upon their single DD formula considerably over the years. RECOMMENDED!

FULL REVIEW:​

The butterfly effect is something that many attribute to “what if’s” in not only their lives but in others. What if this one thing did or didn’t happen and completely changed the course of history?

That’s what I personally imagined with KZ if they had only started off with the tuning they’ve been making in the last few months. But the more I think about it, the more I see it as a “what if” and more as a “how far can they grow” as management seems to have shifted from trying to follow trends to refining their existing products and innovating new products.

The Zenith is one such product that aims to refine the tried and tested “flagship single DD” formula that started way back in 2022 with the D-Fi. I touted that as the best KZ IEM ever tuned, but the Zenith seems to be the IEM to finally dethrone that.

A TO ZENITH​

To talk about the Zenith, we must talk about those that preceded it. The KZ D-Fi was the first in line with this “diffused field” style tuning that seemed to be alien to the usual v-shaped tuning that KZ had. The D-Fi was, for all intents and purposes, the pioneer to what KZ is today.



This was eventually followed by the Krila, a set that divided the community as it followed the same “DF” tuning but added in an extra BA that hailed from their other sets like the ZS series of IEMs. This added a level of technicalities that the D-Fi could not achieve, in exchange for a clearly worse timbre.



Then came the cheaper but still equally “neutral” Polaris that, at one point, was the best budget IEM that KZ has in terms of tuning. Same tuning switches, same DF tuning, plastic body and under $10? It sounded like a dream, at least until the EDC Pro took that place by having no tuning switches and a flat b-pin connector for even more affordable.




KZ then had a series of hybrids and more “fun” tuned IEMs like the Saga Bass and the weird Merga and Vader High Resolution single DD that was more akin to the brighter leaning Pianist. Not my favorite from their single DD.

And finally, their current flagship DD, the Zenith. This boasts more than just improved sound. They’ve improved nearly everything in this IEM.

UNBOXING​

Figure number 1, the unboxing. I was weirded out at first when I noticed that the box that KZ sent over was larger than usual. I thought to myself, “is this a different IEM? I’m not expecting a product other than KZ today, what could this be?” Lo and behold, it was the Zenith with its massive packaging, which only meant one thing:

HERE’S A FULL LIST OF THE ACCESSORIES:

• IEMs
• Cable
• Carrying Pouch
• 6 pairs of Eartips
• Tuning Tool

This is a monumental moment for KZ. I know they did this too with the Sonata, but the Zenith is my first time experiencing a KZ with an actually compelling unboxing experience. Do I think they’ll keep this up? Not at the budget segment, that’s for sure. But I’m just glad to see that after all these years, they finally gave you a decent amount of accessories and a freaking case.



The foam eartips aren’t very good, though. Paired with the case that holds the eartips, you’re guaranteed to rip apart the foam eartips that come with the product.



The case is good, but it follows old Dunu-style cases where it doesn’t open all the way. It’s stupid and I hate it, but beggars can’t be choosers when they’ve literally never included a case in their modern IEMs ever.

BUILD & FIT​

Another similarity that the D-Fi and Zenith have is its build. Bask in the Zenith’s full-metal-glory and an actually mesmerizing faceplate that competes with the PR series of IEMs for having the best looking aesthetics. Mainly because there’s no stupid font on the IEM.

Before I proceed with the build, I want to mention the internals of the KZ Zenith. This is because they’ve spent a considerable amount of ink talking about how different this DD is from other DDs.



This full range ultra linear “Driver X” has a larger voice coil and larger neodymium magnet that apparently allows it to produce less distortions and a cleaner overall sound. Does it do that? We’ll talk about it soon. But seeing them R&D their DDs out of everything is something I’m glad to see because that means it’ll eventually begin to show up in the sub $20 range and provide an even better value for the consumers.



Continuing with the build, the Zenith’s overall shape is in the medium range for KZs. Not as small as something like the Saga, but not as massive as the Symphony. I quite like it. It’s not super snug nor does it seal perfectly, but it’s comfortable enough for long listening sessions without any fatigue or discomfort.



I will choose to not talk about the cable because quite frankly, out of all the things KZ could have improved, the cable was NOT one of them. Am I disappointed? Yes, but I’m not surprised either.

SOUND​

Sound Signature​

The KZ Zenith follows the “diffused field” tuning of its predecessor and refines it to the level that I never knew KZ was capable of. Impeccable timbre, great detail retrieval, consistent tonality and tuning switches that mildly changes the overall sound. It’s just a really well-tuned IEM. At least, with the small issue of KZ’s treble still causing a bit of edge which in turn gives the Zenith a more prominent detail retrieval.

Drivability​

One thing that these series of KZ’s IEMs is just how hard they are to drive. A friend of mine measured the D-Fi’s impedance and it reached a whopping 112 ohms. That’s insane for an IEM, but understandable considering how well it scaled. The same can be said with the Zenith as pairing this with a balanced cable and good power brings the best out of the IEM’s sound characteristics and further smoothens the edges. This IEM is also a blank canvas for sources and perfect to compare between darker, brighter, smoother and more nuanced sources. This, unfortunately, means that lower quality amps won’t bring the best that the Zenith has to offer.

Volume Scaling​

Due to that impeccable tuning, the Zenith has great volume scaling. I can crank the volume knob on the Zenith on my DAPs on high gain and go 60-70 with little to no fatigue. There’s a bit of edge in the treble, but generally tolerable even at higher volumes

Listening Experience​

My first few days with the Zenith seemed a little lackluster as I had been simmering in pricier sets like the DK3001BD and NX8 with impeccable techs and tuning or weirder IEMs like the Kotori IEMs. The Zenith completely breaks free from that by… being boring?

Okay, boring is not the way I’d describe the Zenith per se, but this tuning has been done countless times. The main difference between those that came before and the Zenith is how refined it sounds.

The bass is very clean and the slope is just perfect for most genres, the mids bring most vocals and instruments in a very linear way that avoids unnecessary recessions or overemphasis and the treble is crisp but natural sounding. The only pain point that I could realistically point out is that treble being a little too edgy.

The albums I spent the most time on the Zenith are Time and Pace by flu and Geordie Greep’s The New Sound. Two very contrasting albums in vibes and complexity but two albums that I slowly grew to love over time as I disliked both of them at the start. Time and Pace changed the recording and mixing of the original songs released a few years ago and The New Sound just sounded so weird and not vibey. But the more time I spent, the more I appreciated both albums for what they were.



The Zenith performed majestically on both albums, but I particularly loved it on Time and Pace because of how much I’ve listened to this album on the Zenith. I was essentially losing my passion for the album a few weeks prior to getting the Zenith and the Zenith brought back that passion. The tuning is, once again, nothing special, but the “normalness” made me appreciate just how well-mixed this album is. The Zenith’s tuning was perfect for Time and Pace’s less complex but musically rich mixing. It’s not the most nuanced or tactile IEM I’ve heard for this album as you’ll see in my comparisons, but it does the album justice in more ways than one. The only gripe I had was on brighter sections with sharper cymbals and hi hats, the Zenith can get a little hot. Details are fantastic in turn, but fatigue can be induced if you really push the volume or you’re just that sensitive.



The New Sound, on the other hand, showcased its capability to play complex tracks while sounding quite natural and clean. The self-titled track's rather complex composition was quite a treat to listen to on the Zenith, but also showcased the Zenith’s limitations when it comes to its technicalities. It’s no slouch, especially for the price, but there are definitely better single DDs to handle complex tracks. What the Zenith goes for is how consistent it sounds. Edginess be damned, I never found myself feeling like something stood out more than it does on other IEMs I’ve listened to with a similar neutral tuning. And most of those IEMs are far more expensive than the Zenith.

So aside from being pushed to the edge on complex compositions and the occasional edge in the treble, the Zenith is a solid IEM overall. Tactility is acceptable, especially for the price and consistency is phenomenal. It doesn’t distract from the music that you listen to which is perfect if you just want to plug and play. That also means that this IEM is not for those looking for a specialized sound with bigger, boomier bass or sharper and snappier treble. But that’s the beauty in the Zenith’s sound. It just works and it works really well.

COMPARED TO THE OTHER TUNING MODES​

I enjoy the simplicity and logic behind the tuning switches of the Zenith and its predecessors because it just makes sense. You flip the far left switch and the bass goes up, almost like a 4 band EQ. Well, exactly like a 4 band EQ.



Unfortunately, the Zenith falls under the same issues that those kinds of tuning switches have which is that it barely changes the sound. I normally talk about it more in depth, but the real-world experience is so minor that I can just chalk it up to “it increases the subbass a bit”

COMPARISONS:​

vs KZ D-Fi​

Obviously, I HAVE to compare it to the grandaddy of KZ”s single DD. And as you might expect almost 3 years after the first, the Zenith is a far better sounding IEM. Bass is far tighter, cleaner and more consistent, the mids doesn’t get as congested and the treble is smoother and more refined with better resolution. It’s fascinating to see the growth of the “flagship” DD of KZ and how much they’ve actually improved.

vs Simgot EW200​

Compared to the budget single DD goat, the EW200 is still the “technically” superior IEM between the two but the timbre of the Zenith is just more consistent overall. Nuance is better on the EW300 from bass tactility to treble definition, but the Zenith is an IEM that you can listen to for much longer. So it then comes down to whether you want a tech budget DD or a timbre budget DD with both ends completing each other’s cons

vs EPZ Q5/Q5 Pro​

Basically the same story as the EW200, but the Q5 leans closer to a brighter tone than the Zenith which would cater to trebleheads better. The same can be said for the EW200, but the Q5 is a brighter and more “detailed” overall set compared to the Zenith. More fatiguing too which would make it a very clear decision between the two

vs EPZ Q1 Pro​

The Harman god doesn’t stand a chance in terms of timbre and consistency against the Zenith, but does beat the Zenith out in raw details and resolution. Externally, the fit of the Q1 Pro is also far better than the Zenith while the Zenith is better built, but I wanted to mention the fit specifically as it saves the Q1 Pro from being totally outclassed by the Zenith in every regard.

vs Kefine Klean​

Compared to the little brother of the Delci, the Klean is a far warmer, more relaxed but equally flawed in the treble region. Unfortunately, the Klean’s lower eargain emphasizes that peak far more than the Zenith does and causes than “low-res” sound that budget single DD’s with low eargain suffer from. The Zenith doesn’t have nearly as much musicality and warmth as the Klean, but the upper mids mask that treble region a bit better. Technically, they’re about on par with each other

vs Truthear Zero RED​

Compared to the universal sub $100 competitor, the Red is a far smoother, more musical but also slightly less detailed IEM compared to the Zenith. The Zenith’s detail retrieval is a half step up better than the Red while the Red’s tonality is much warmer and fuller, especially when throwing an impedance adaptor.

vs Simgot EW300 on Silver nozzle​

I wanted to specifically mention the silver nozzle variant of the EW300 as, quite frankly, the EW300’s silver nozzle follows the Zenith perfectly. Now you might expect that they’d sound exactly the same, but the difference in driver configuration and implementation means the EW300 will be a more “relaxed” and “refined” set compared to the Zenith. The bass is more “nuanced” on the EW300 with smoother but less defined treble details and better technicalities overall.

CONCLUSION:​

On one end, KZ’s improvement and refinement of their single DD formula gave birth to probably their best single DD IEM to date. I cannot think of a single IEM that KZ has released with a single DD that captured my heart as much as the D-Fi did, at least until the Zenith came out. Impeccable tonality, an actual decent unboxing and phenomenal build quality.

But take the Zenith into the real world and you see that it’s bound to be a small fish in a big sea. I don’t want to discount the efforts KZ have made to make the Zenith as good as it is, but IEMs in this price range really have to stand out to be worth getting. The Zenith is worth getting, but there are IEMs like the EW200 breaking sub $100 IEMs ankles and the Red continuing to be THE sub $100 reference along with the Hexa. It’s a safe set to get and one that KZ lovers would absolutely fawn over, but a set that plays by KZ’s mentality of slow and steady wins the race.

Thank you for reading my full review on the KZ Zenith. If you would like to order one, you can use the non-affiliated link below:
https://kz-audio.com/kz-zenith.html

WATCH FULL REVIEW HERE:

Introduction​

KZ has been changing something in the direction of their products lately, and the KZ Zenith is another one that popped out from nowhere during this silent revolution of the brand’s portfolio.

Disclaimer: the KZ Zenith were sent to me by KZ so that I could write an honest review. This review represents my personal opinion on the set, it isn't promotional or paid content and I don’t get any revenue from the sales of this product.
At the time of the review, the KZ Zenith were sold for about €70 at KZ-audio.com.

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Technical Specifications​

• Driver Configuration → 1 x DD
• Impedance → 23 Ω
• Spec-sheet Frequency Response → 20Hz-40kHz
• Sensitivity → 108 dB
• Cable → 1.25m OFC cable with QDC 2-PIN connectors
• Plug Type → 3.5mm

Packaging​

The packaging of the KZ Zenith represents a steep change of direction in the packaging. It’s a well done packaging considering that we’re talking about a KZ set, and it’s much better than their classic packaging. The box contains:

• The KZ Zenith
• The detachable cable
• One set of starline silicone tips (S, M, L sizes)
• One set of foam tips (S, M, L sizes)
• Hard carrying case
• User manual

Design, Build Quality, Comfort and Isolation​

The KZ Zenith are probably the best-looking KZ IEMs to date, especially when it comes to the design. The manufacturing is honestly excellent as well and I struggle to say something wrong about it (in fact, there aren’t any complaints in that regard).
Unlike other KZ sets, it’s the first time KZ speaks about the ventilation and the grills underlying the faceplate look like they are perforated. Since this should lead to a semi-open back design, this would explain why the isolation from external noises isn’t excellent with the Zenith in the ears.
The earpieces are also pretty comfortable, even though the angle near the golden screw could probably bother those with very small ears during prolonged listening sessions (no issues at all in my case).

Cable​

The cable is the same low quality cable all over again, and I really suggest KZ to upgrade it. It’s not only about the appearance, it’s also a matter of perceived quality and absence of a chin slider (which is usually good to have instead).

Sound​

GEAR USED FOR THE TEST

• DAC: Topping E30
• AMP: Topping L30, Fiio A3
• Mobile phones: Samsung Galaxy S7 Edge, Xiaomi Mi A3, Samsung Galaxy S23 Ultra
• Moondrop May’s DSP cable with PEQ=0
• Dongle: Apple Type-C dongle, Fosi DS2, Hidizs XO
• Portable DAPs: Benjie S8/AGPTEK M30B
• Bluetooth Adapters: KBEAR S1, KZ AZ10
• Other sources: Presonus AudioBox iONE, Elgato Wave XLR

Amplifier needed?
An amplifier is not strictly needed but I felt like the Zenith were performing slightly better with a tighter and cleaner low-end and better overall dynamics while using a good quality dongle with respect to the average jack port of a laptop or older phone.

Let’s speak about the sound.
I will refer to the 1110 configuration since I really think it’s the most attractive for this set. I will then speak about the impact of the various positions so that you can have an idea on how the sound changes when the switches are used.

The Zenith are the result of what KZ has been changing lately: it’s a well balanced, full-sounding set that never feels overly bright nor too dark, not lacking bass without being bassy, not lacking treble without being annoyingly bright. And yes, the mids are there!
Starting from the low-end, in fact, we get a proper sub-bass extension that is far from sounding exaggerated: it retains nice control even when reaching very low notes, and even though it’s not the most surprising set you can buy if you want to dig super deep, you won’t feel it’s lacking something.
The bass has good weight, it’s present in the mix yet not to the point of being the star of the show, which is surprising if we consider that this is a KZ set. The bass texturing is nice for the price, there’s enough punch to the bass and what surprises me more is the overall naturalness and realism of the bass (I have never heard such good bass quality on a KZ DD set).
The midrange is not as recessed as on other KZ sets, and thanks to the well mannered bass you get the benefits of the added warmth in the lower-midrange without having a bloated midrange. Male vocals are well done with the right amount of warmth and female vocals sound natural without becoming hot nor sibilant. If anything, a touch more air during the reproduction of female vocals would have been the icing on the cake.
The treble is another selling point of the Zenith being non fatiguing, very smooth and natural. The Zenith aren’t detail-monsters but they aren’t even treble cannons like KZ IEMs used to be, and this natural manner of managing the whole treble (and its extension) without extracting artificial detail is probably what really distinguishes the latest KZ sets from their older products.

The technical performance is pretty good for a single DD set, with a well-rounded soundstage, on point imaging and enough space between the instruments to have proper instrument separation. If anything, the layering is only average as it struggles a bit with multiple instruments’ layers (its peers in the same price range are almost on the same level).

How do the switches affect the sound?
Basically, all the switches off mean basic curve with a very linear bass. I think that the basic curve lacks some depth and weight in the low-end, but maybe those who don’t really dig a thicker low-end will like it.
Then this is how it works:

• First switch ON → +1dB bass boost
• First and second switches ON → +2dB bass boost
• First, second and third switches ON → +3dB bass boost.

The last switch, in combination with the other switches, provides for a full range boost. So if you have all the switches ON you will basically boost the low-end also and have a louder sound.
If you use the first 3 switches separately, then you still get small bass boosts depending on how many of the 3 switches you're activating, and if you activate the 4th switch alone then you just make the earphones louder no matter the position of the other switches.

I think the basic curve has its own advantages, such as a tighter and slightly speedier low-end, and maybe the upper end has slightly more recognizable smaller nuances. However, the +3dB bass boost with all the three switches on provides for a fuller, richer and more mature sound with better note weight and depth, even though some tightness and speed are partially lost.

Are they something I would use considering my taste and preferences?
Yes, of course.
It’s a well done IEM overall: solid technicalities for the price, natural timbre, smooth treble, enough bass and good midrange presence. It’s a set of IEM that does most things right and I would really struggle to find reasons not to use them if I didn’t have more expensive (and well tuned) sets around me.

Some Comparisons​

KZ Zenith (UUUD) vs KZ Saga Bass

Upgrade or not? Well, if you like the super energetic and fun-sounding Saga Bass, you may find the Zenith “too balanced” at times, but in terms of timbre and technicalities the Zenith are way above. Comfort is good on both sets, isolation is better with the Saga Bass in the ears. Even though the Zenith come with better packaging, the cable is the same and this is weird.
I find the Saga Bass more fun to listen to, but the Zenith are technically superior and this is undeniable.

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KZ Zenith (UUUD) vs Kefine Klean

The Kefine Klean have a touch more extension in the sub-bass region and slightly more treble energy, so the Zenith actually end up being “thicker” in comparison since the smoother and more rolled-off upper end provides for an overall warmer sound. Bass quality and textures are better on the Zenith, female vocals are more energetic and emotional on the Kefine Klean.
Imaging and instrument separation are mostly on par whereas the soundstage is bigger on the Zenith. Build quality is good on both sets, Klean’s stock cable is better, comfort is better on the Zenith and isolation is better with the Klean in the ears.

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KZ Zenith (UUUD) vs Sivga Que

Go with the Zenith.
The Sivga Que are nice and kind-of unique in their price range but in terms of technical performance and overall sound, the Zenith sound fuller and more mature with a smoother and more versatile tuning. Technicalities are also slightly better on the Zenith.
Build quality is very good on both sets, comfort is better on the Zenith and isolation is better with the Que in the ears. The Que come with a much better cable.
It’s not that I don’t like the Que, in fact I actually do, but you get a higher value for a similar price if you buy the Zenith.

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KZ Zenith (UUUD) vs Simgot EW200

The Zenith sound pretty warm, the EW200 sound pretty bright.
The low-end response is kinda similar but the emphasis on the mid and upper treble on the EW200 make the Zenith sound a bit thicker overall. Male vocals and acoustic instruments are better on the Zenith, whereas female vocals, violins and electric guitars are better on the EW200: pick your pill.
Technical performance is on par more or less, even though the resolution of the EW200 is still amazing for the price, especially considering that spring 2025 will mark their 2years anniversary. The soundstage, however, is bigger on the Zenith, as they can offer better width, depth and height.
Build quality is good on both sets but the Zenith have a unique design. EW200’s stock cable is better. Comfort goes to the Zenith, whereas isolation is a tad better with the EW200 in the ears.
As a small sidenote, I’d really like to point out how good the EW200 are, being able to compete with recent IEMs without struggling too much. Hopefully we’ll see more sets like it in the future as we really need stuff that stands the test of time.

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Final Thoughts​

The Zenith were a surprise, both thanks to the tuning and to the technical capabilities. It’s a set that has so many good things, such as the timbre, the bass quality, the treble tuning and everything lead to an IEM that is hard to dislike or criticize.
If anything, the basic curve isn’t very attractive or particularly inviting and female vocals aren’t the most refreshing out there, but I really struggle to find real cons and it wasn’t usually the case with KZ.
I really like the new roads that KZ is exploring and hopefully we’ll see better and better stuff from them.