LETSHUOER DZ4

Quick Disclaimer: I'm beginner and just casually listen to music without thinking much about it. I may use terminologies that are more personal but will do my best to describe it. These are also my own opinions, I did not read any reviews prior to making my own(basically going in blind) so if you have your own comments or perhaps any feedback regarding my review or the IEMs, please don’t hesitate to share your thoughts.

The gear I’m using is just really simple: ASUS TUF Laptop, Roseselsa 9039 Amplifier and DAC(review coming soon!) and the LETSHUOER DZ4.

Big thanks to LETSHUOER for sending the DZ4 to our local community for the review tour. Looking forward to working together with you!

I’d also like to extend my thanks to Sir Mars, Sir John and Jhetner for giving me the opportunity to be part of the review tour and extend a helping hand in writing reviews and testing the gears, without them I would not be making this review. I cannot thank you guys enough.

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So let us begin.​

The LETSHUOER DZ4 is definitely a game changer; if you’re a newbie/beginner like me and just casually listen to music without the technicalities you’d probably think that a 69$ IEM wouldn’t make any difference and you’re better off spending less than 20$ but oh boy I was wrong. This is one of those rare occasions that money does indeed go together with quality.

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The Unboxing Experience​

The outer box sleeve has Z which goes well with the fact that this IEM is called the “DZ4”; it's even textured on the orange parts so plus points for that.
The Hi-Res Audio certification is also present so you know that you’re in for a treat; unlike the IEMs that I’ve bought(Salnotes Zero, Wan’er, Chu 2 and Castor Bass), they don’t have the Hi-Res certification but still sound great otherwise.

Flipping the outer box sleeve over you can see specs of the IEM. From the frequencies, impedance and build material.
No frequency response graph was included though which isn’t a big deal but is needed for a better reference in case you need to compare it to different IEMs and their sound signature.

Unboxing feels like a brand new iPhone, the IEMs and the carrying case are the first to see and inside the case is where the cable and ear tips are stored. I do appreciate that they included a strip of velcro to not only to keep the cable from unwinding but also keep the IEMs stored neatly should you put them aside for a while.

I'd also like to mention that the IEMs have a metal faceplate and the chassis/shell is 3D Printed Resin which gives it a nice matte finish.

At first I thought the carrying case was made out of metal but it's made out of plastic though it doesn’t feel cheap and inside the case has a thin layer of rubber.
The only thing I dislike about the case is that it smudges easily and cleaning it doesn't seem to restore it back to it's flawless state.

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Specifications​

Cable is 1.2m 0.05m*216 silver-plated monocrystalline copper.
And the IEMs are equipped with three(3) 6mm titanium dome dynamic drivers and a 6mm passive radiator.

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Listening Experience​

The DZ4 is like hearing music within music(if that makes sense), the statement “you get to hear a different dimension” applies in this case. Have you ever had the experience when using higher quality headphones you'll hear some parts of the song you've never heard before? Yeah it's that feeling. While it doesn’t make you hear celestial beings or the 5th wall, it opens a new gate when listening to music and gives it more dimension.

Wearing the IEMs for a long period of time doesn't cause any fatigue, the weight and fit of the chassis adds to the listening experience that you don't have to constantly adjust because over time it gets loose.

The flexible cable doesn't tangle even if you roll it up loosely or tightly, it unwinds very well; did I mention that it doesn't make noise as you move around? Gone are those days that you hear the cables brushing over your shirt or the surface and just focus on the music.

Instruments really pop off in these IEMs, it’s as if you’re in the studio when the band is playing. You get to hear the strums and strikes which adds to the immersive experience. You’re not only just listening to the music, you’re actually there when the music was recorded; which is something I would describe this feeling.

The Treble and Mid-range frequencies are on point, even if the volume goes up there is no audible distortion and doesn’t hurt your hearing(though please listen at safe levels).

Sound staging, imaging and depth are also worth mentioning here since there is a decent amount but could be improved; you’d have to go back and forth looking for the right song and listen closely which I find a bit of a hassle but when you do then you'll know the difference. I guess that’s the “different dimension” I was talking about.

As a bass head I can say that there is a minimal amount of bass but lacks in sub-bass, you won’t get that "feel" that would shake your eardrums but is enjoyable to listen to. While some songs do have a punchy bass, the IEMs don't make up for it.

My standards have definitely gone higher after using these since I only have experience with budget IEMs within the 15 to 25$ range, spending a little more will yield different results and this is one where it is super worth spending more.

Again I would like to thank LETSHUOER for sending these over to our local community for a review tour and giving everyone a chance to listen to this 69$ IEM and compare it with the other IEMs in line for review or the existing ones we've bought.

Disclaimer:​

I’m more of a Tech head than audiophile and I use Youtube Music for 99% of my listening. Take everything I say with this in mind and please don’t come after me for not having refined taste. This is purely from my silly little point of view, of which you might be interested in.

Gear Used:​

Streaming Platform: Youtube Music Premium (Bitrate: 256kbps AAC & OPUS)
Dongle: USB to Lightning JCALLY JM08L

Box:​

For $89, everything is there. A small box with all the fixings inside, I’d rather have these compact packages with everything inside to be honest. It makes it easier to keep the box while still being able to appreciate it. They come with a hard plastic circular case with a screw on top which is honestly a first for me. I wouldn’t call it impractical but as a carrying case it definitely becomes a point of friction if you plan to store and bring the IEMs around in them. The whole plastic case also has the matte black finish on it which I know will just love oily fingerprints and marks on it. I still prefer my little carrying case with all my dongles than the included one but if these are your first pair I suggest you look for a more practical alternative than having to unscrew your way to your IEMs everytime you just want to chill at a cafe. Definitely more of a storage box than a carrying case.

Inside the case there are also the included ear tips in this circular holder of sorts which is cute but definitely takes up way too much space. It comes with 6 pairs of tips, 3 sets for a white set which is soft and another 3 for a stiff set. I ended up using the soft set since it provided the nicest seal for me while being comfortable as well. This will obviously vary from person to person, but it was a little fun going back and forth between the sets dialing the fit down for maximum comfort.

Build:​

After holding and feeling the pair for the first time () what immediately came to mind was the initial confusion as to what the actual material itself was. It honestly felt like one of those magnesium alloy built the same type they use in more expensive laptops because of how lightweight it was while seemingly still being metallic-ish. Although after checking the specs I found out it’s actually resin 3D printed for the inner shell and aluminum for the outer side. It’s honestly pretty cool that something of this footprint can weigh this much. I don’t know if this 3D printed resin is a newly used material in the IEM space but if it leads to cool outcomes like this then I’m all for it.

The included cable is this nice metallic silver looking braided cable that’s got this inner foil like material inside it. It matches the pair pretty nicely and it’s not noisy or heavy at all so if these are the only cables you have then I don’t see anything wrong with them for day-to-day use.

Sound:​

The main thing I appreciate about these are guitar strings and higher register.The guitar strumming in Chivalry is dead - Trevor Wesly can be clearly heard and appreciated. The drums do sound a little lackluster but still there, nonetheless.

The backing vocals sound especially crispy in Missin You Crazy - Russ. These seem to be very good within that range of vocals being clearer and not missing any details in place of a deeper bass. So if you’re an official bass head then these probably won’t do it for you but if you like to lay down a bit of country and folk then these might be your partner.

Honestly the tuning itself isn’t for me but I can appreciate it in certain songs, nonetheless. While the overall sound stage is very nice, I can't help but feel this sense of distance from me and the sound itself. Not sure if it’s an actual feature but there are some song vocals that sound like they have this layer in between them and the mic. Either that or it’s because certain things just sound so more pronounced that it puts certain ranges on the backburner.

Nitpicks:​

My biggest personal gripe with these is for how lightweight they are, you still feel very aware of them while wearing them. I don’t know exactly what it is, it might be the fit or the overall shape, but these just don’t disappear after a minute. Fitment is comfy overall, and they create a good seal for me but every time I wear them, I can’t help but be very present with them. The best way to describe it would be if you’re suddenly aware that you’re breathing and now you’re breathing manually (I bet you just did).

Final Thoughts:​

If you listen to a lot of Pop or EDM then these might not sound very fun to you but if you’re on the flipside of that spectrum then I don’t think you’ll find a lot of things to complain about what you’re getting for the price. I do think that this price point is extremely competitive right now and these don’t exactly offer anything outstanding aside from the unique-ish material choice. But if you thought they looked nice and already ordered them then rest easy because these won’t break your heart like that girl that every country singer seems to talk about in the back of their F150 pick-up truck.

But remember, music is a personal experience, and you should find the gear that makes you enjoy your music the most regardless of what a graph says.

Disclaimer
Please note that I am not an audiophile, and this review does not delve into the technical aspects of the IEMs. My impressions are based on my personal preferences, and others may have different experiences with this product. I also have a very limited experience with audio products so please take this review with a grain of salt.

The Letshuoer DZ4 was lent to me as part of a review tour in the Philippines.

Price: 69 USD (nice )
Link: https://letshuoer.net/products/lets...sive-filtering-module-edc-hifi-in-ear-monitor

Part 1: General Product Details

Package Inclusions:

• IEM shells & cable
• Carry case
• 6 pairs of eartips

The IEM Shells

• The shell body is made of a flesh-colored plastic. The plastic does not feel cheap. The faceplate is made of a rose gold-ish colored metal with a lightning bolt-like opening (a stylized “z” perhaps?), revealing an orange mesh inside.
• The earpieces weigh ~5.2g. They don’t feel heavy despite being about 2g heavier than my daily drivers

The Carrying Case

• The carrying case is a small round cylinder with a twist-to-open lid. The lid has the name logo of Letshuoer front and center.
• The carrying case is made of a matte plastic covering material that is prone to marks, so you have to be careful or you might scratch it easily.
• It is also very bulky as a carrying case, weighing at 76g and has a dimensions of 8cm x 8cm x 3.5cm. I think it would be better called a storage case

The Cable

• The cable is pretty good! It doesn’t feel cheap at all, and is wound and braided very well. There are no kinks or bends to it and does not tangle easily. It has a straight 3.5mm jack at the end.
• The cable has a Letshuoer-branded cable tie near the jack. Though is nifty, I wouldn’t want to use it as it keeps getting caught on my deskmat, pulling out the stitches. It’s a good thing it is removable.

Part 2: Subjective review


General Usage Impressions

• It fits perfectly, even a millimeter more and it would become too tight for my ear canals.
• I can definitely use these for long periods of time without being fatigued easily

Sound Impressions

• There’s some soundstage in the DZ4, but not enough to give you taht “airy” feeling, or immersive experience
• The tuning seems to be brighter, good for vocal tracks but I’m not really a fan for this sort of tuning.
• I need to bring up my volume higher than normal to get a good bass rumble, but when it’s there, it’s good.

Final Thoughts

The DZ4 is an okay IEM for its price. It gives great value with its good quality build, carrying case, and the freebie tips.

Will I buy the DZ4? Frankly, no. While I’ve only tried listening to a limited number of IEMs, I’m pretty sure the DZ4 has a lot of competition in the same price range that will fit my preferences. Still, I think it will fit many other peoples' preferences so this still gets some high points from me.

Besides, after coming from the Project M and Pilgrim, it definitely made me want to hear more of those kinds of IEMs.

PS: Thanks for the free candy!

Introduction

Letshuoer DZ4 here…Hello everyone!!! Today I’m reviewing and writing about the Letshuoer DZ4 – A triple dynamic driver configuration with a single R-Sonic passive filtering module. The same PFM that was later adopted in their excellent Letshuoer S15. The 3 dynamic drivers are 6mm each with Titanium built. The PFM although not a mechanical driver connecting to the 3 DDs, however, works in tandem with the drivers boosting the overall frequency response. The IEM comes with a beautiful shell design and a color that is hard to find with many IEMs these days, which I find to be very attractive in the first place. Letshuoer is in collaboration with HeyGears for 3D-printing and they did a terrific job with this IEM. DZ4 appears more attractive in terms of color, design, and aesthetics than the S15 – just my opinion. For the price, you will get a well-built and attractive cable with a 3.5mm termination only.



The case is like that of S15 in a round resin-coated box but comes in Black – For the price, it is more than just decent. The case size is adequate for the IEM and the tips, which are neatly assorted within the case – well done. 2 varieties of tips included – Vocal and balanced. I tend to use the balanced tips the most including Softears UC tips. I did not notice a big difference between the two and stock tips do the job very well – Most of my impressions are based on stock-balanced tips only. At the time of this writing, I spent around 80 hours of listening. The IEM has a neutral tone with a moderate sub-bass boost. Before diving in, I would like to thank Letshuoer for arranging this review sample for which I’m very thankful and greatly appreciate their gesture. As always, to the best of my abilities and intentions, I will be as honest as I can be. So here we go:





Specifications

• Three 6mm Titanium Dome Dynamic Drivers and one “R-Sonic” passive filtering module.

• Four-way Acoustic tubes, two-way crossover circuit

• Semi-open faceplate design – A fusion of metal and Resin

• Drivers connected to a dual-pin receptable via a flexible printed circuit (FPC) crossover board.

• Four cores of 216-strands, 0.05mm in diameter silver-plated copper cable.

• Standard 0.78mm dual-pin design with 3.5mm single-ended termination.

• CNC-milled anodized aluminum casing with a semi-open design

• Sensitivity: 104dB

• Frequency response: 20Hz – 40KHz

• Impedance: 12 Ohms




Disclaimer:

• The review is my own based on extensive and critical listening and was not influenced by any written or video review.

• The review is subject to unit variance and my personal listening preferences.

• The review is subject to the gears I used for testing – DAC/ DAP/ Tips/ quality of the track

• Last but not least, I have no affiliation with the supplier of the IEM.


Gears/ Audio used for testing:

• S24 Ultra

• HPZ x ddHifi 3.5mm USB dongle DAC

• Tempotec V6

• Cayin RU7

• Topping NX7 Amp paired with the above 2.

• Spotify premium




Driveability/ Scalability

The DZ4 is a fairly very easy-to-drive IEM. It played well with all my sources from ddHIFI dongle to pairing with V6+NX7. All the sources that I have are neutral ones. But the best-sounding dongle with the DZ4 was the Cayin RU7. RU7 provides a little more body/ note weight to the slightly thin-sounding DZ4 complementing and turning it into a more musical and engaging listen. For the Indian audience though I would suggest the HPZ x ddHIFI dongle which is more than sufficient to drive this IEM at its best. In fact, for this review, I did not for the most part switch over to any other source. It was that efficient. The only problem was the lack of independent volume controls. Fiddling with the volume controls on the mobile can be tiring and exhausting on certain tracks – the volume can be either too high or too low due to a lack of precision and control on the Mobile volume levels. Aful Snowy Night was very neutral and transparent and sounded in line with the Tempotec V6 – Not a big difference but excellent, nonetheless. The best-sounding one goes to RU7 but the cheapest dongle in the Indian market is equally pleasing as well.


The Sound Impressions:

Bass

Sub-bass has the quantity, physicality, rumble to it, and a good depth but does not touch the lowest of the lows. However, the sub-bass has a good texture and I find it to be very adequate giving a satisfying and engaging listen when the track calls for it. Mid-bass has a decent body, slam, and very good tone to it and PFM performs its job boosting the bass region, however, at times it does sound inadequate in the overall body. It’s kind of hit and miss – In certain tracks, it is very good, and at times not so impactful. It is not a bad-sounding bass by any degree, but I wish there was more quantity and consistency to it.

Overall, the bass region lacks a bit of authority in the overall sound profile. The IEM has a decent bass profile with quality sub-bass over mid-bass, but I wish the mid-bass could have been more authoritative. This results in a super clean and clear mid-range, and this is what this IEM is all about where things start to fall in place. Overall, a decent bass performance but left me wanting for more at times.



Mids

The note weight is slightly on the thinner side of things at times due to the tamed mid-bass but not recessed by any means. Don’t expect much warmth here as the tuning intentions are very clear now – keeping the midrange as clean as possible without sacrificing the musicality – I would say Letshuoer has achieved it with precision. The clarity and details from the vocals are fantastic. These are vocal-centric IEMs where vocals are not way forward nor pushed back as well. The male vocals have good energy, clear sounding, and do not sound dry. The instrumentation in the mids sounds crystal clear with excellent tone, timbre, and details.

Female vocals have a very good energy and are not shouty for the most part. On very rare occasions in certain tracks, I did notice the aggressiveness, but I don’t call them shouty. Lead instruments do not get aggressive in their presentation as well. Upper mids to lower treble transition is well controlled here. However, getting a grip on the correct volume level for your ears is still important here as the sudden increase in volume can be piercing – upper mids are still elevated in the overall mix.



Treble

The upper treble is less boosted compared to the lower treble. There is a Letshuoer house sound with the treble that I find with all their products (S12 and S15) and DZ4 is no exception. The upper treble lacks full extension to the sound however there is smoothness and openness in the treble region making it a very good-sounding treble. The airiness present is decent and makes the overall presentation smoother and engaging, however, with moderate spaciousness in the treble notes. The treble still sounds moderately energetic in its presentation without any inhibitions and can be very good for treble-sensitive listeners. Overall, I liked the treble performance with DZ4 being open-sounding with good details.

Technicalities

Resolution and details are a highlight of this IEM at the given price point. Excellent resolution and fantastic details here. Dynamic transients are seamless and play a part too. Layering is again done excellent considering the price point – very adequate and can’t think of more for the price. The soundstage is spacious molding to the venue and has a very good height and width. The depth is lacking though making it more of a 2-dimensional sound. Stereo Imaging is very good at the price point with a decent accuracy. Following the audible trail isn’t an issue here. Finally, the tone and timbre appear very natural sounding.

Comparisons:

Letshuoer DZ4 (89 USD) vs Hidizs MS3 with Bass filter (119 USD)

Fit, comfort, looks, and accessories:

➢ Both will fit like a glove for most people and are excellent for me. Comfort is excellent on both however, I should mention that the thick cable of the MS3 tends to pull the IEM a little out. It happens to me but, I don’t see it as a big issue in terms of overall comfort.

➢ In terms of looks, they are contrasting but excellent in their own way – Both are champs in the looks department. The build quality of both are very good. Honestly, I liked the cable quality of MS3 by a notch above. It’s kind of bulky, textured, and a looker. DZ4 is not bad and is excellent at its very good-looking price point, matching the IEMs, sleek, and comfortable for long wear. Both have a good assortment of tips. MS3 has 3 tuning filters but I tend to prefer only the bass filter. DZ4 comes with an excellent round carry case whereas MS3 comes with a decent-sized pouch – easy to fit in the pockets.

Sound:

The comparison is done with HPZ × ddHIFI dongle only – It is sufficient to drive both crazy good. I preferred only the bass filter on the MS3 as the upper mids elevation on balanced and treble filters is too much for my tastes. The only con with the Bass filter is that the resolution is not so crispy, and details are muffled in comparison to the other 2 filters. Stock-balanced tips are used for both the IEMs.

➢ Hidizs MS3 has more sub-bass quantity but is less focused whereas DZ4 has a good control and has a focused sub-bass and texture, but less quantity in comparison. Depth wise both do not go very deep.

➢ Mid-bass is strong and slamming on the MS3 with more quantity and great authority but is slightly less resolving. Comparatively, DZ4 has a lesser Mid-bass impact, slam, and authority, again focused but more resolving. I think Bass heads enjoy MS3 more than DZ4 even though MS3 is a tad less resolving and bleeds into lower mids. I liked both for their respective traits in various use cases.

➢ Instrumentation in mid-range is more resolving on DZ4 but is thin-sounding in comparison. MS3 sounds warmer and there is a slight bass bleed with bassy tracks that makes the instrumentation slightly bloated, less resolving, and not so crispy – probably due to the Bass filter.

➢ Male vocal clarity is excellent on both sets. Can’t say which I prefer more. Female vocals exhibit good energy and are not shouty on the DZ4. Upper mids/ lower treble is more elevated on the MS3, and female vocals do sound very energetic and at times shouty. But with the Bass filter, it is much more manageable. The lead instruments do sound on your face with MS3 and can be fatiguing for a longer listen in comparison to DZ4.

➢ Treble is more open sounding, smoother, and airy, with better resolution and detail on the DZ4 compared to MS3. However, the energy on treble is more with MS3 compared to DZ4 but better controlled with DZ4. For treble, it is a very easy pick.

➢ Tonality is very good with DZ4 compared to MS3. MS3 is good but there is a slight BA timbre which isn’t very natural. Timbre is better on the DZ4 with more clarity to the notes.

➢ The soundstage is open and spacious on both sets. Imaging appears accurate but not pinpoint accuracy on both sets. Both do a good job here. Stereo separation is slightly better with the MS3. Height is a bit better on the DZ4 and both the IEMs lack the stage depth.

➢ Resolution is better on the DZ4 with crispy note weight definition and better detail retrieval compared to MS3. Layering is the same, but the resolution in the bass-heavy tracks makes a difference. DZ4 maintains the better crispiness among the two resulting in a better layering overall.

Comparison Conclusion:

“To sum up, DZ4 is better than the MS3 in most of the aspects and is relatively cheaper as well. I would go with the DZ4.”


Letshuoer DZ4 (89 USD) vs Aful MagicOne (109 USD)

Fit, comfort, looks & accessories:

➢ Both the IEMs have an excellent fit. I don’t have issues with either of the IEMs but I’ll slightly lean towards the MO as it is relatively small and gives a deeper fit of the two. Comfort again goes to MO as it stays snug in my ears and provides more isolation from outside noises as well.

➢ In terms of looks, I would go with DZ4 as I find them more attractive compared to MO. I’m specifically fond of the color of the DZ4, often not so used/ found. Accessories that include tips, cable, and a carry case are decent for both sets. We get a balanced cable with MO and single-ended with DZ4. It is justified as DZ4 is quite easy to drive when compared to a Mamooth-like MO. I find the cable quality similar, but I will slightly lean towards DZ4 – Better looking and textured. Tips are better with the DZ4 as I used their stock-balanced tips for most of my listening whereas I can’t say the same for MO. I use the third-partytips W1 from Spinfit which suits the MO quite a lot better.

Sound:

The comparison is done using the V6+NX7 combo as MO is a power-hungry IEM and I’ll be dishonest if compared otherwise. DZ4 is also tested at the same power output of 1400mw at 32 ohms in medium gain. So, both are at their absolute best as far as the driving power/ scalability is concerned.

➢ I perceive better depth and texture of Sub bass from MO compared to DZ4. Also, the bass execution and decay are exhibited faster on the MO making it more focused and clean compared to DZ4. Even in the quantity, I find the DZ4 slightly behind the MO. One thing the DZ4 has is the physicality in sub-bass which is more felt compared to MO. In the other aspects of the sub-bass, DZ4 is not lacking but MO is slightly better overall.

➢ Mid-Bass is weightier, impactful, and fuller on the MO compared to DZ4. PFM helps the bass performance of the DZ4 trying to keep it very clean, but it sounds on and off at times. Sometimes fuller, weightier, and sometimes not so much. Whereas MO has been consistent with the mid-bass, I liked the DZ4 mid-bass performance at times on par with MO, and at times not so much. Not a full-bodied mid-bass on the DZ4 in comparison.

➢ Instrumentation has better note weight and body to the MO than DZ4. Mid-level instruments sound fuller in comparison to MO. The instrumentation on DZ4 is slightly crispier and more detailed at the cost of slightly lesser note weight if that’s your preference.

➢ I can’t say which I prefer more for the vocals as they both excellently render the vocals. But I very slightly prefer the MO as I find them slightly more emotive compared to DZ4. Female vocals have very good energy and can be more aggressive on DZ4 compared to MO. The lower treble is way better controlled on the MO compared to DZ4.

➢ Treble is slightly more energetic, airy, detailed, and extended on the MO compared to DZ4. Other than that, both are treble are smooth sounding in general for me. MO tops the treble here but the DZ4 has a very good treble performance as well. Honestly, DZ4 comes close here.

➢ Tonally I prefer both. They both sound natural to my ears. Both sound very crispy with good separation and have a very good timbre. Musically I prefer MO slightly over the DZ4. DZ4 is excellent here however, I feel the MO has great consistency across the frequency range due to the single BA cohesiveness.

➢ The soundstage is almost similar on both sets. There is adequate spacing in both the sets and the width is almost similar. Height is very good and similar on both sets. There is more depth to the stage on MO compared to DZ4. Depth on DZ4 is kind of lacking. Imaging is more precise pinpoint accuracy on MO compared to DZ4.

➢ Resolution is kind of similar on both sets. Slightly better on each of them at times. I slightly prefer the MO over DZ4 since MO is comparatively fuller sounding especially in the mids producing better details at times. Both have crispier note weight but less bodied mid-bass on DZ4 favors more details at times as well, but not by much in comparison to MO. Layering is excellent on both sets. I don’t notice a big difference here as well. Since both have adequate spacing throughout, details can be easily perceived on both.

Comparison Conclusion:

“To sum up, I prefer MO over the DZ4 for most of the aspects but DZ4 has come close to MO in most such cases. Also to note, MO is my favorite IEM reviewed in 2023. This makes me conclude that DZ4 is an excellent value for me at a 20 USD lesser.”

Letshuoer DZ4 Review Closing Thoughts:

DZ4 is an excellent all-rounder at its price point. I found them a little boring and not so exciting to listen to, initially, but it has grown on me over time and started loving them the more I listen to them. DZ4 is an engaging and musical set with excellent details and resolution. It is different from the sets that I previously owned at this price point like the Moondrop Aria, and it is a good thing to have a different perspective to your listening. DZ4 comes with a new patent technology that has been well-translated to the sound. The same proprietary technology that was later implemented in their excellent S15. I recommend the DZ4 for what it is, and I trust you will not be disappointed. Give it some time to grow on you.

Letshuoer DZ4 review.


Better late than never, because I am late in reviewing the Letshuoer DZ4, which surprised me with its excellent midrange performance and overall good sound quality, with a selling price of $65.

I would like to thank Letshuoer Audio for sending the DZ4 for a review as a part of a review tour encompassing only my local area, and after the tour is over, the DZ4 will be raffled among the participants. Thank you, Letshuoer Audio.

The packaging is simple, and the unboxing experience is good. It includes high-quality eartips, a cable, and a carrying case.

The DZ4 utilizes three smaller drivers and a passive radiator on each side instead of a single big driver. The shell is medium-sized, the build quality and finish are top-notch, and the fitting on my ear is among the best fittings in my memory.

I used the pre-installed eartips for this review, as I find them to sound optimal. The sources I used are my Fiio M15s DAP and Letshuoer Audio DT03 dongle DAC.



Sound signature:

Neutral, with a very slight elevation in the upper midrange and treble. It has an excellent midrange and vocals. It is clear-sounding yet non-fatiguing.

Technicalities:

The soundstage is above average in size, almost spherical in shape; it has nice depth, but it is slightly more wide than deep. The imaging is good but lacks definition and accuracy. It can take a good amount of power and can go very loud without distorting. The dynamics are also very good, and I hear great dynamic contrast in most music. The overall technicalities are above average for the price.



Bass:

The sub-bass is neutral and has a quick and clean decay; the midbass is also neutral but has a slight thickness, which I assume is caused by the passive radiator; and because of that, the bass detail and definition are not the bass, although it still sounds clear and clean.

Midrange:

The best part of this IEM is that it sounds neutral, clean, and well balanced; there is no shoutiness or distortion, even at loud volumes. There is a slight elevation in the upper midrange, and I noticed it favors the female vocals slightly. But overall, the midrange is clean, clear, and fatigue-free.


Treble:

It is smooth, slightly elevated, and has good macro details, but the micro details are not the best; the upper treble sounds slightly relaxed. The overall treble sound is smooth, clear, and non-fatiguing.



Compared to the Letshuoer S08 (99 USD):

The S08 is a planar IEM and a newer model coming from Letshuoer Audio.

The S08 has a mild U-shaped sound signature, while the DZ4 is more neutral and slightly mid-forward. The S08 has fuller and deeper-sounding bass and a more extended upper treble with more micro-detail. The soundstage is bigger with the S08, and the imaging has slightly more definition. The DZ4 has better vocals, and I recommend it more for vocal lovers.



Compared to the Dunu Titan S2 (80 USD),

The Dunu Titan S2 has more bass and treble than the DZ4. The bass on the Titan S2 is fuller-sounding and more textured and defined, while the midrange and vocals are more recessed. The treble is more extended in the Titan S2, but both have similar resolution. They have similar soundstage size and imaging performance. The Titan S2 is tuned for a more casual type of listening, while the DZ4 is more specialized, but it can still be enjoyed by everyone.




Compared to Simgot EA500 (70 USD):

The old Simgot EA500 has more mid-bass; the DZ4 has slightly more midrange and is thinner-sounding in comparison. The DZ4 has a deeper soundstage and more laid-back imaging, while the EA500 has a flatter soundstage with more intimate imaging.




Pros:

- great vocals sound
- clear overall sound
- good resolution
- build quality
- bass has fast decay



Cons:

- micro-details are not the best
- bass has fast decay
- not for warm heads and bass heads

Conclusion:

The Letsuoer Audio DZ4 may not be for everyone due to its tuning; bass heads will not be happy with it, but the midrange is so good that it makes this set unique among the competition; it has very good-sounding vocals, making this a memorable IEM for me. I recommend the Letshuoer Audio DZ4 to people who love vocals.

Happy listening! Cheers!

Disclaimers

I bought this iem with my own money. This review is completely subjective.



Accessories

Dz4's box comes with a hard plastic carrying case, eartips, cable and iem itself. Ok accessories for price.

Build

Dz4 has a good quality plastic housing and have a metal faceplate with a orange Z mesh. Pretty interesting and good looking design that coming with a good build quality.

Sound-Tonality and Technicalities

Dz4 comes with 3 titanium dome 6mm dynamic driver and a 6mm passive radiator (According to tests, passive radiator is not much of use) I really don't like this iem because it's too warm and dark for my taste. It just sounds lifeless. It lacks sparkle and detail. Detail production is below average and soundstage is quite narrow. Imaging is ok tho. Bass impact and rumble is decent and bass dyanmic are pretty good. This thing have a good mid bass texture and good sub bass depth. Midrange is just... Ok i think. Have enough instrument seperation and clarity. Thumbs up for that.



Conclusion

Should you buy this iem for 80-90 dollars? No. Because you have better options like tangzu fudu, moondrop aria 2 and tinhifi t5s. These are just examples, you have bunch of other options too. But still, if you like warm, dark character... this is a still good buy for you.

Letshouer Dz4, a pair of IEMs that boast natural, clean vocals and, in my opinion, are one of the best in their class. But there's something unique about these IEMs, so read the review until the end.

Oh yes, firstly, thank you to Letshuoer Audio for giving me the opportunity to review this product.

Note: This review is based on personal listening experience, so it remains subjective, but nothing is exaggerated or diminished for specific reasons.






Starting with Packaging & Cable: The packaging for these IEMs is simple, with a round case inside the box containing small, medium, and large ear tips, totaling 6 pairs. In my opinion, the ear tips are somewhat hard and not very comfortable to wear, so it's better to get aftermarket ear tips. The build quality of the cable is quite good, with a thick braided design and an elegant silver color. However, despite the nice appearance, the stock cable doesn't deliver the best sound for the Dz4 IEMs, which I'll discuss below.




Build Quality & Fitting: In terms of build quality, these IEMs use a combination of metal faceplates and resin throughout the shell. The design is simple and attractive, with a broken white color and some semi-open back with the letter 'z' on the faceplate. Although slightly bulky, the IEMs feel lightweight. However, when using the stock cable, I felt some pressure on the upper part of my ears or the ear hook, as if it was pressing too hard. It might vary for different ears since everyone's shape is different, so it's subjective.

Now onto the sound, starting with the Low: The bass on these IEMs isn't overly deep but still maintains a decent punch, with drum beats sounding clear and good texture with enjoyable rumble. The decay is sufficient, even for faster songs, but don't expect too much since these IEMs aren't specialized in bass. Tested with songs like Meghan Trainor's "All About that Bass" and Paramore's "Anklebiters."

The Midrange is where these IEMs shine: They possess natural, clean, and pleasantly sweet vocals. They're not too thick to feel muffled nor too thin to be piercing or boring. In my opinion, the vocals sound very natural and pleasing. There's a hint of sibilance, but it's not bothersome; it adds energy and clarity to the vocals, stopping at the right moment, which is surprisingly unique and enjoyable. Tested with songs like BabyMonster's "Sheesh" and ILlit's "Magnetic."

Moving on to the Highs/Treble: The IEMs deliver energetic, crisp, and airy highs without being piercing or fatiguing even during long listening sessions. This is my second favorite aspect after the vocals. Listening to songs with many instrumental trebles is very comfortable and fun, with guitar plucks, violin strings, and cymbal strikes sounding clear and smooth. Tested with various songs from an audiophile sound test playlist on YouTube Music.

Lastly, Technicalities: These IEMs have a fairly wide soundstage thanks to their passive driver and semi-open back design. However, the 3D imaging with the stock cable feels a bit odd, lacking focus in instrument placement. But don't worry, replacing the stock cable solves this issue. Regarding gaming, these IEMs are excellent for pinpointing enemies accurately; sounds are directional, making it easy to locate threats. Tested on Apex PC. The timbre is also very natural, and instrument sounds are rich and lifelike. Above-average resolution with a good sense of clarity.

Conclusion: These IEMs are worth buying if you're looking for clean, natural vocals with fun and energetic highs. However, keep in mind that some may find the stock cable's sensation a bit odd or peculiar, so you might want to try third-party cables like Tripowin Zoe or Xinhs Cooper. That's all.

If asked what's the best IEM for vocal under 1.5 million rupiahs? I'll honestly answer this IEM.

Some say they don't quite like its warm sound and somewhat ethereal imaging, which "can be fixed with a new cable." And DZ4's sound is indeed somewhat warm, maybe not for those seeking energy... even the passive radiator seems to make the IEM feel even warmer or more relaxed.. its bass quality doesn't make you go "wow" but the mids are seriously pleasant, everything sounds smooth without any weird upper mid or treble spikes... its musicality is very comfortable with heavy dynamics... Letshuoer achieves a somewhat unique Harman target where the mids aren't thin, which I think is very important in the market... if not all Harman IEMs will sound the same with somewhat recessed mids with increased upper mids that are more noticeable + the presence of instrument-vocals is more noticeable than richness and natural musicality.

Vocal sound needs warmth and airiness in it, if not, the people you talk to will sound somewhat boxy in the real world, and that's not the case here.

**Rating:**
- Low: ★★★★☆
- Mid: ★★★★★
- High: ★★★★✮
- Technical: ★★★★★ (changed cable -1 stock) (4.8/5) {☆ 0 point, ✮ 0.5 point, ★ 1 point}

Letshuoer in Indonesia seems to have gained popularity since the S12 Pro. The reason is clear, an IEM Planar that falls under the "Indonesian student budget" category and tonally favored by many audiophiles, namely V-Shape. I remember auditioning it and indeed the Mid part sounded far from satisfying because of its positioning which is more towards the back and not natural.
Then around mid-2023, Letshuoer released an IEM that I've never seen its driver configuration, and in Indonesia, it doesn't seem as popular as its predecessor. So, the question arises, is it less good in terms of sound at around $85 (1.4 million Rupiah)?
Let's discuss it, here's the Letshuoer DZ4.

==DISCLAIMER==​

All impressions and reviews are subjective and follow the belief of "just my little lies, of course, reviews should be honest." Agreed? Alright. Different? Okay. Because I review because I want to and just enjoy it, not because I need to haha.

• But if you say this, it must be because you're just using it now? Oh, absolutely not. I'm a true audiophile hobbyist who will always be honest without bias. Don't believe it? Read until the end, and we'll discuss the pros and cons.
• But if you say this because it's new, probably just in the "honeymoon" phase, right? In this "dark and poisonous" hobby, it will remain so until the end of the world. Human desire is endless. Hahaha.

But it's better to just listen, right? You're right.

Important!! I suggest you still audition it yourself, maybe my ears need an ENT doctor or maybe you need one (haha).

Click to expand...

==THIS POST IS FOR==​

• What's an IEM with a 3DD + 1 Passive Radiator configuration like? (for God's sake, I don't know if this passive radiator is like a car radiator or what. but what's certain is that it moves passively based on the impact of the other 3DDs)
• What's a good IEM for vocals and acoustic music?
• Just want to read a review

==DESIRED SOUND==​

• Crispy treble, with a bit of spice if possible
• Good quality and quantity bass, but not for bassheads
• Technicality, imaging, and clarity are top-notch
• Wide soundstage

==TESTED WITH==​

• Youtube Music
• Tidal
• Hiby M300
• Fiio Q15
• Lenovo Office Laptop (What series)
• Letshuoer DZ4

==SAY IT WITHOUT SUGARCOATING==​

Unboxing:
For its price range, I think the box is decent. The box material isn't too thick so it doesn't feel special. But what I like is the simple packaging, so there's not a lot of unnecessary design and placement. The contents of the box are sufficient:

• The IEM itself
• Carrying case (The case has a matte finish, smooth, comfortable to hold, and I think it's useful. Although it's not too big inside)
• Cable 3.5mm jack (The cable is similar to the S12 Pro, it has a metallic feel and I have no problem with it at all. It suits its price)
• 2 types of ear tips with 3 sizes each. (Ear tips that suit its price. Useful for those who don't have other ear tips, you can use the ones that come with it)
• Manual

Fitting:
Letshuoer really knows how to make IEMs with good finishing. As for the design it's simple with broken white color, but the metal + resin material used gives a strong impression with a nice matte finish.
The nozzle, which is standard in size and length, makes it comfortable to use and suitable for the ear tips that come with the box.

Bass:
If you like deep bass but not too powerful like bass heads, this IEM will suit you. In terms of texture and bass quality, it's very good in its price range with decent power.
Unfortunately, this aspect is not supported by the sub-bass, which is less than optimal. The sub-bass has a too quick impact, so it's less enjoyable for sub-bass lovers.

Mid:
Melodious~~. The most appropriate word to describe its midrange. Not only melodious with natural male and female vocals, but its presentation is also more advanced than other aspects, making the sound produced very enjoyable. However, the sound produced feels a bit lacking in airiness and boldness.
This is why I say this IEM has a specific purpose, namely created for slow acoustic songs with good bass tuning and super melodious natural vocals. So, how about the treble? read the next section!

Treble:
The treble part is really good. The impact when plucking guitar strings feels right with a crispy sound without hurting the ears. But when it comes to the upper treble, you will feel the treble is not clean enough and the sparkling sensation is lost in the middle.
For those who listen to slow and acoustic songs, this won't be too bothersome because it focuses more on vocals and the beginning of the treble is quite good.

Clarity, Soundstage, Imaging:

• Clarity: The lack of power and sparkling in the upper treble makes it feel less clear. For other parts, there's no problem with micro-detail presentation that can't be complained about in its price range.
• Soundstage: In its price range, it has an above-average soundstage.
• Imaging: The sound feels 3D which is very good and can present instruments and sound separation well. But because of the less clear upper treble, that part feels more recessed.

Specs:

• Three dynamic drivers + single passive radiator in-ear monitor HIFI earphones.
• Four-way Acoustic Tubes, Two-way Crossover Circuit.
• Semi Open Faceplate Design, A Fusion Of Metal And Resin.
• The drivers are connected to the dual-pin receptacle via a flexible printed circuit (FPC) crossover board.
• Joint Effort With HeyGear, The Leading 3D-Printing Supplier
• Four cores of 216-strands, 0.05mm in diameter silver plated copper cable.
• DZ4 comes with a standard 3.5mm single-ended plug, featuring a standard 0.78mm dual-pin design.
• High precision in 3D Printed chassis production to meet ergonomic principles.
• CNC-milled anodized aluminum casing with semi-open design.

Honestly, I don't understand much about its specs, especially its drivers haha. But this IEM is a bit above average in terms of difficulty to drive.

=CONCLUSION=​

• Letshuoer really understands how to make IEMs with minimalist designs that are beautiful and comfortable to use.
• Perfect midrange presentation with good bass and treble tuning is not supported by the minimum sub-bass impact and the recessed upper treble.
• From its pros and cons aspects, Letshuoer seems to target a specific segment for vocal lovers with slow acoustic music genres.
• Is it worth it? If your music genre is mostly like that, I think it's cool. But if not and you still want to buy it, it's okay too, it's your own money haha.

That's it.
Trust your ears.
Bye.

INTRO


Hello everyone! This is my full review of Letshuoer DZ4. The unique configuration of this IEM stands out among of its competitors. Let see how it sings!


Disclaimer


I would like to thank @Letshuoer for arranging a unit for me. 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.



Specifications


Driver configuration : 3 x 6 mm titanium diaphragm dynamic drivers + 6 mm passive radiator

Impedance : 12 Ohms

Frequency response : 20 Hz - 40 kHz

Sensitivity : 104 dB

Cable : 2-pin, 0.78 mm; 4-core 216-strand silver-plated monocrystalline copper cable : 3.5 mm

Price at $89 USD







Packaging


The packaging comes the IEM itself, a premium cylinder case. The two sets of silicone tips "Vocal ear tips" and "Balanced ear tips" The cable has an excellent build and quality.


Build and Comfort


The build is sturdy, and the sleek design gives a more premium feel than expected in this price range. The earpiece are lightweight, making them comfortable for extended use.





Sound Aspects


Source used :


Realme 9 Pro

Jcally AP7

Ibasso DC04 pro


This iems spend 50-60 hours of burn in using pink noise before taking details of this review


The unique configuration of this DZ4 is really interesting. I'm really expecting the passive radiator will help the bass to give more punch perhaps I found if you give it enough power the subbass man it will give you that visceral feeling I discover this experience when I'm burnin this DZ4 with the pink noise its not the usual pink noise experience there's an air blowing rumbling inside your ear.


Bass


It has controlled and clean presented bass. The sub-bass shows more body than midbass.
The passive radiator gives that sub-bass visceral feeling. This is not for basshead people out there. The midbass lacks punch and texture. It has good subbass extension and impact.


Mids


The mids are forward, clear and detailed, the male vocal sounded a little lacking in terms of body and texture. Female vocals does sound fuller and richer compared to male vocals. The midrange instruments are lush and engaging, the strums of guitar in acoustic songs is tastefully done, it doesn't get harsh even at high volume.


Treble


The treble is smooth and safe, energetic enough but not excessive to the point where it get harsh. Treble extension is good and but it has lack amount of air. The relaxed presentation of treble contributes to a long listening session.


Technicalities


Soundstage is wide and spacious with good sense amount of width and height and depth as well. Imaging is good as for the asking price. Separation is quite good. You can easily distinguish the placements of instruments.


Comparisons


Vs. Truthear Hexa


Hexa has better bass quality. Mids in hexa is like artificial sounding for me some sort of hifi experience than the more natural presentation of DZ4. Highs is airier and sparkly in Hexa. Technicalities is ahead on hexa but not in the wide soundstage of DZ4.


BASS

DZ4 << HEXA

MIDS

DZ4 >> HEXA

TREBLE

DZ4 << HEXA

TECHNICALITIES

DZ4 = HEXA

SOUND TIMBRE

DZ4 >> HEXA





Conclusions


The Letshuoer DZ4 provide impressive audio quality at a budget-friendly price. A solid choice for those seeking great vocal clarity, smooth musical presentation, relaxed and smooth treble for long listening session and great reliable performance without breaking the bank.

DZ4 the first model of its kind from this manufacturer. In this case, I'm talking about the layout and material of the shell

In short, this model has three dynamic drivers and one chamber called a passive radiator

It turned out very interesting, considering its low cost layout and non-standard materials

Let's start with the equipment: one earphone has three dynamic drivers and one passive radiator. Shell has a very interesting body, made of plastic, apparently. This is not 3D printing, most likely it is casting, but at the same time the material itself, namely plastic, has an interesting structure, color and density. This material is lightweight, apparently very durable, pleasant to the touch and quite interesting visually.

The cable is ordinary for your budget, but at the same time it is moderately soft and quite good, and it sounds very well assembled

Im note the interesting design uh, both the shell and the faceplate. Uh, they play very interestingly from a design point of view. It is original, unusual and futuristic

Let's shower, like some, respected manufacturers have finally come up with a universal shell shape that fits almost all ears. They fit me very comfortably

They're very comfortable and I don't feel any discomfort from wearing them for a long time and listening to music. It is really very comfortable and anatomical

The main thing about the sound is that the sound has a very balanced tuning with good separation of high mids and low frequencies, high and low frequencies do not touch the middle, coherence is at a very high level

The driver coordinated three dynamic drivers of the same diameter very well. Each driver is responsible for its own frequency spectrum, in addition to the three drivers, as I wrote above, there is a passive radiator

It’s difficult for me to say what physical role it plays in terms of sound, but apparently it plays a significant role in coordinating the three drivers. That is he is engaged in cutting off unnecessary frequencies, unnecessary pressure or make deep bass, meybe...))

I often came across the fact that it is famous manufacturers who cannot coordinate uh drivers in multi-driver and e-mom systems

Be it hybrid circuits or circuits with the same type of drivers. In this case, the LETSHUOER perfectly coordinated the three drivers

In general, the presentation is very comfortable, detailed with the presence of a sufficient amount of bass, a solid midrange and quite beautiful high frequencies

These high frequencies are very comfortable, not sawing, not rattling, not screaming. The overall presentation is very comfortable and melodic for this price segment - this is a very good proposition

I highly recommend this model for people who want to get acquainted with magadrivers. Or, for example, they want to get acquainted with multiple drivers of the same type, drivers in a given price segment. This is a great deal and this model is a very strong competitor in this budget

#LetshuoerDZ4 #LETSHUOER LETSHUOER Letshuoer Audio

Three dynamic drivers + single passive radiator in-ear monitor HIFI earphones.
Four-way Acoustic Tubes, Two-way Crossover Circuit.
Semi Open Faceplate Design, A Fusion of Metal and Resin.
The drivers are connected to the dual-pin receptacle via a flexible printed circuit (FPC) crossover board.
Joint Effort With HeyGear, The Leading 3D-Printing Supplier
Four cores of 216-strands, 0.05mm in diameter silver plated copper cable.
DZ4 comes with a standard 3.5mm single-ended plug, featuring a standard 0.78mm dual-pin design.
High precision in 3D Printed chassis production to meet ergonomic principles.
CNC-milled anodized aluminum casing with semi-open design.
Its outstanding sound performance brings exceptional adaptability and compatibility, catering to various usage scenarios from music reproduction, gaming, to basic monitoring needs.

Packaging and accessories:
Earphones
Carrying case
Two types of ear tips in three sizes each
Silver-plated copper cable
3.5mm single-ended plug
Warranty card and instruction manual

Specifications:
Sensitivity: 104dB
Frequency response: 20Hz - 40kHz
Impedance: 12 ohm
Chassis material: 3D printed resin
Cable: 1.2m silver-plated copper
Drivers: triple 5mm titanium dome DD + 6mm PR (passive radiator)

The DZ4 is a truly unique configuration. The packaging is beautifully simple. Inside is all the great accessories included. The DZ4 themselves are light and comfortable. They are a sturdy 3D printed shell and I really like the look as well. The case is very sturdy but on the smaller side, still it works good enough. The cable is both pretty and well made, it also comes with tips of good quality.

Sound:
Bass: presents neutral with a little Sub-Bass boost but tastefully so. Bass in general is more quality than Basshead. The speed and details are excellent but is a little less in texture than the average Harman.

Mids: midrange shows off the DZ4s neutral tuning mids sound fantastic and have a nice natural sound with plenty of energy and details. vocals are forward and female vocals sound a little better in my opinion.

Treble: The highs have air and sparkle without harshness and over extension, good energy and details in general things sound crisp.

Soundstage: Is accurate and open but the Width is much more impressive than depth. Still, it doesn't suffer on busy recordings.

Afterthoughts: The DZ4 offers an exceptional value for someone looking for a neutral IEM with good quality Bass, Mids, Stage and non-offensive treble.

Disclaimer:​

I appreciate Letshuoer for sending me a review sample of their Letshuoer DZ4!
However, the review will remain unbiased and entirely honest.
I do not consider myself to be an audiophile; rather, I am just a guy who enjoys trying out various IEMs and DACs and listens to music frequently.
Consequently, I will not review it using a lot of technical terms, but I will try to describe them as best I can.
Being my first product from this company, I will not be able to compare it with their other products.

Letshuoer DZ4 Tech Specs:​

• 3 x 6mm titanium dome dynamic drivers + 6 mm single passive radiator in-ear monitor HIFI earphones.
• Four-way Acoustic Tubes, Two-way Crossover Circuit.
• Semi Open Faceplate Design, A Fusion Of Metal And Resin.
• The drivers are connected to the dual-pin receptacle via a flexible printed circuit (FPC) crossover board.
• Joint Effort With HeyGear, The Leading 3D-Printing Supplier
• Four cores of 216-strands, 0.05mm in diameter silver plated copper cable
• DZ4 comes with a standard 3.5mm single-ended plug, featuring a standard 0.78mm dual-pin design.
• High precision in 3D-printed chassis production to meet ergonomic principles.
• CNC-milled anodized aluminum casing with semi-open design.
• Its outstanding sound performance brings exceptional adaptability and compatibility, catering to various usage scenarios from music reproduction, gaming, to basic monitoring needs.

Letshuoer DZ4 Packaging:​

For its price range, the DZ4 has one of the most complete packaging.
High-quality packaging has been used. White cardboard with a front graphic that is slightly embossed. Finding such a complete and well-made package makes me happy every time, especially in entry level iems! It has a great cable and, more importantly, very good tips, just like the Kbear 07 tips, which are my favorites.






However, I don’t think it’s important for the packaging to be expensive; instead, I think the focus should be on the product’s quality.

• Hard carrying case
• High-quality Cable
• 6 pairs of tips (Similar to Kbear 07)
• Manual and warranty

Letshuoer DZ4 Design/Build quality:​

The shell was made in collaboration with HeyGears, a leading 3D printing company. The build quality is definitely excellent, and the resin and metal fusion are absolutely perfect. To the touch, the resin shell feels satiny. The nozzle is a bit big and integrates two dampers. No ventilation holes are visible in the shell, but the back, where we find the CNC faceplate and the orange grille, is semi-open (which I deduce allows the passive radiator to work). Internally, from the photos that appeared on the web, the construction is excellent and clean; we see 3 drivers connected by a crossover via a flexible printed circuit, and all the drivers are separated with acoustic tubes.

Cable details
After being worn, the comfort is superb. Even after hours of consecutive listening, no pain is felt. Choosing a matte finish helps keep fingerprints off the shells.

Initial sound impression:​

Right from the start, the sound is different from the mass of IEMs on the market. Being unfamiliar with it, one feels a little out of place. The sound is bright but never sibilant, W-shaped but oddly mid-centric. The voices seem to be in the foreground. The bass is very track-dependent, and even the perceived quality seems very genre-dependent. Tracks that are too complex seem not to be the favorites of this IEM. Being the first impression, I do not express myself regarding the functioning of the passive radiator.

Equipment used for testing above:​

Device:

• iMac
• Redmi Note 7 (MIUI-based)

Software:

• Foobar2000 24bit 192khz (iMac)
• Amazon music UHD 24bit 96khz (Both)

DAC:

• F.audio KS01 (ESS)
• EPZ TP20 3.5 mm (Dual Cirrus)
• Hidizs XO (Dual ESS)
• EPZ TP30 (Dual ESS)
• Less DA1 (AK4493)

Letshuoer DZ4 Final sound impression:​

My ears too need some burn-in time before moving on to final impressions. I stayed with them for a few more weeks so I could figure out how they sound.

I’m not listing all the tracks because they’re too many, but with Billie Eilish’s albums, this set sounds spectacular.



I have listened to Jazz, RAP, R&B, Pop, EDM, and Chill music, and I think it is also the most suitable for DZ4.

It took me longer than expected to understand them. This is the first set where I don’t change the stock tips because they are exactly the ones I would have used.

Its sound and tonality have a neutral tendency; it is focused on the voices that always come first compared to the rest, or at least in 90% of the songs. Bass and sub-bass remain a mystery, and I would confidently state that it totally depends on the track you are listening to. Its soundstage is intimate but has a certain three-dimensionality to what you hear. It’s not a concert hall effect, but you can distinctly hear the individual drivers working on different frequencies, giving the sensation that the sound comes from several points, even if all at different depths. What I seem to hear is a sound that develops in height and depth. For example, in Billie Bossa Nova’s song, there is clearly a 3D effect, while in Billie Eilish’s Your Power, the guitar lacks musicality at the beginning but in other songs is completely fine.

I find them very detailed, but on some tracks they seem less coherent. But I have to say that they sound good, unlike many others.

Bass​

Personally, I really enjoy the bass; it’s punchy and tight, and the vibration or impact in the ear canal is definitely audible. Maybe the passive radiator helps, although it is impossible to say for sure, but the quality of the low frequencies makes me think so. The sub-bass is emphasized, and for a 6mm driver, it sounds really amazing but sometimes seems to be slightly thin.

Mids​

The mid-frequency region is excellent! I would say that this set’s strongest point is the midrange, with remarkable accuracy, transparency, and engagement. Voices are consistently audible, smooth, and focused. However, female voices are definitely better than male ones. I can feel the air in his midsection.

Treble​

The high frequencies are well refined and detailed; they are not tiring, but compared to the mids, they take a back seat. However, they are excellent even if the general tone is a bit strange, but perhaps it would be better to say something different! On some somewhat complex tracks, when turning up the volume, you start to feel a little tired, for my taste.

Soundstage and Imaging​

In comparison with other IEMS, the soundstage is really narrow; it develops more in height and depth but remaining on the sides, without wrapping you entirely.. It’s an IEM that depends a lot on the playing track but also on the genre you are listening to. The image is definitely accurate, it is slightly above average! You can clearly separate the instruments, even in more complex tracks. I sometimes have a three-dimensional feeling probably due to the excellent driver separation. it is a decidedly strange sensation, difficult to describe.

Comparison:​

vs Whizzer HE10



Two completely different souls the Whizzer HE10 is definitely warmer and more relaxed sounding. At their convenience, they are both very comfortable, but the nozzle and shell of the HE10 make them one of the most comfortable. Its warm, relaxed note doesn’t compromise on quality or detail, and it remains one of my favorites. If you are afraid of high frequencies, these are some of the smoothest on the market.

vs Hidizs MS3



Right now, my favorite is the Hidizs MS3. There is extraordinary detail here throughout the frequencies. Micro-details abound in the highs. It is an IEM with a lot of energy and a price that is unquestionably appealing, but it costs twice as much as the Letshourer. Read my Hidizs MS3 review on Head-Fi if you are interested.

Conclusion:​

It is unusual to hear something with a different tuning, and I personally enjoy hearing the Letshuoer DZ4. The choice of 3 small titanium drivers and a passive radiator has resulted in something that stands out from the crowd. I can’t say for sure that this passive radiator is a game changer as it doesn’t have extreme bass, but the sub-bass is felt as well as the vibration in the ear canal. Obviously, they may sound strange to many, but at the same time, they appeal to just as many people. Personally, I advise using them with a DAC that has a warm sound, such as the EPZ TP20, to enhance the low frequencies.

So I recommend them to anyone looking for a headset that emphasizes the voices and, above all, to those looking for something different.

More information & Where to buy (no ref link):​

• LETSHUOER Official Site
• Aliexpress Official store
• Amazon UK
• Amazon USA

I’ve been quite a fan of LETSHUOER’s recent releases such as the S12 and Cadenza 12. They’ve had a harder time IMO breaking into the ~$100 price bracket. They had the D13 which I wasn’t a fan of and the ~$100 and under price point has quite the competition already. They would need to come out with something that was unique if they wanted to stand out in the crowd IMO. They definitely came out with something different for the entry level IEM bracket. The DZ4 is using 3 dynamic drivers and a passive radiator setup. It comes in at $89.

Quick shoutout to LETSHUOER for sending the DZ4 to check out and review. While I always appreciate the chance to test and review products sent in from manufacturers or dealers, it never affects the rating of my reviews.

The LETSHUOER DZ4 can be pickup below:
https://letshuoer.net/products/letshuoer-dz4-triple-dynamic-drivers-single-passive-radiator-edc-hifi-in-ear-monitor

Onto the review of the LETSHUOER DZ4! My personal preference is a hybrid/tribrid IEM where I get good hitting bass and have a detailed treble with decent mids. When it comes to an over ear headphone I prefer a spacious sound with a deep low end, the mids to be more forward and the highs to be a little bright with some sparkle. I listen to a lot of genres but I hover in the classic rock, blues and edm music with some rap here and there.

Gear Used​

IPhone 14 Pro Max with headphone adapter, Hiby R6 PRO II, Moondrop MoonRiver 2 Ti, Moondrop Aria, Truthear HEXA and Everolo Z8/SMSL SP400 stack

Looks and fit​

The DZ4 shell has a different design compared to the rest of the LETSHOUER lineup. It has a beige “hearing aid” like color that is softer on the shell. I like the way this feels against my ear and it makes for a comfortable experience on longer listening sessions. The faceplate has a close matching silver-beige color and an orange design that is vented. The vented design on the faceplate does make this an semi-open IEM design. I like the comfort and fit of the DZ4.

Isolation and sound leakage​

The DZ4 does passive isolation pretty well. It does however leak more sound than other hybrid designs. It seems that semi open faceplate probably helps with the passive radiator which has the benefit of a better isolated seal for the user but the trade off is a lot more sound leakage in quiet areas. I wouldn’t use this at normal or higher listening volumes in quiet areas.

Packaging and accessories​

The DZ4 comes in a nice and average size box. When you open the box up, it has the IEMs in some foam, under that is the set of tips on top of a circle style case. The tips come in small bore and large bore sets of 3 sizes. I think this works well as the DZ4 does benefit from tip rolling. The case is a screw on type so it does require a second or two to unscrew which is fine. A more secure case but I still really like their magnet style case from their more expensive offerings.

Sound(overall)​

These final impressions were done off the Eversolo DAC-Z8 connected to the SMSL SP400. These impressions are what the DZ4 sounded like to my ears. This was also using the Spinfit CP100+ tips. Things like ear tip selection and DAC/amp selection will produce different results and impressions vs what my ears hear on my specific gear.

The Dz4 has a neutral tuning which is surprising given the 3 dynamic drivers. I was expecting fun bass cannons but instead I was decently surprised and given a very balanced tuning instead. The Bass does have some decent slam/impact. The mid bass is full but it doesn’t have much weight to the bass notes. It just sounds neutral to my ears. The mids and vocals are nice and relaxed. They don’t sound super fast or artificial. They also don’t have any sweetness or warmth so we get a really neutral sound here. The vocals IMO could use a little extra energy since they blend in with the background instruments more than I personally like. The upper mids are really balanced here but I would say they do lean into a neutral-bright sound which gives a little needed energy to notes. The treble is really tame and it doesn’t sound metallic or lacking in sharpness. Once again, neutral. I would say the treble does trail off pretty quickly which makes sense for the dynamic drivers used. I tend to only like neutral and safe tunings in really high end IEMs but I do like the sound the DZ4 produces. It does feel like it could use a little energy either in lows or highs to make it sound unique but I think it’s fine given that it doesn’t sound bad at anything, it just doesn’t sound fantastic at anything either.

Soundstage/Imaging​

The staging is a little strange here. With my preferred tips, I get a wall of sound type of staging. The depth isn’t very good but I do get fantastic width and a little reverse imaging which does make it sound a little different. The imaging is very good which makes sense given how safe the tuning is.

Sensitivity/Drivability​

The DZ4 is very easy to drive and it doesn’t scale much with higher end gear so I think almost anything modern in the last few years will work well with the DZ4. Some super high volume output amps might be too much for the DZ4 and if you have bad channel imbalance at lower volumes, the DZ4 will possibly not be a good pairing with those specific amps. I also had zero floor noise issues with any of my current gear when run balanced.

Stock cable​

The stock cable looks a lot like the ones they include with the standard S12. I like the braid and cable material is a little thicker which I prefer. This makes for a really high quality feel. I also find it light enough to be comfortable when listening for longer sessions. I wouldn’t swap the cable unless you really wanted to run it balanced.

IEM comparisons​

Moondrop Aria​

The Aria is my favorite under $100 IEM. Does the DZ4 dethrone it? No, it's just a good alternate option to the Aria IMO. I would still pick the Aria for a more exciting listen with the drawbacks being I might run into some sibilance on some music. The DZ4 is just a safer listen for pretty much all genres. The Bass impact is stronger on the Aria and the mids are a little sharper as well. The DZ4 has a more balanced lows and mids and I find the vocals are a little more natural sounding on the DZ4. The Aria has a little more energy in the vocals however which makes them pop. The upper mids are much stronger on the Aria which will result in sibilance issues on some genres. The DZ4 never has this problem which can make them boring at times. The treble is tame on both but the Aria is still sharper but a little more metallic sounding. Both pull in good details given the price. Staging is a little more balanced on the Aria vs the wall of sound I get from the DZ4. Both are great. Aria is more fun and risky. DZ4 will play it safe and be more enjoyable.

Truthear Hexa​

The Hexy is another neutral tuned IEM and is a little more traditional with DD and BA drivers. Bass is stronger on the Hexa but the bass sounds a little more natural on the DZ4. The mids are a little more artificial on the Hexa where they sound a little more realistic on the DZ4. The vocals sound great on both with Hexa still sounding just a bit more artificial. The upper mids have a little more of a noticeable boost on the Hexa over the DZ4 but I prefer the Hexa here. The treble is way more sharp and brighter on the Hexa. The downside is that it also sounds somewhat splashy and not as refined. That being said, both are super neutral sounding in the treble, this in no way suggests the Hexa has a strong treble because it doesn’t compared to other IEMs. Both have about average staging but the Hexa has a more balanced soundstage. The DZ4 has a more pronounced wide but short depth to its soundstage. Both are good in my book.

Amping Combinations​

Moondrop Moonriver 2 Ti​

The DZ4 is a really nice neutral sounding set of lower cost IEMs. This is also a pairing I like with the MR2 Ti. The bass does sound like it has a little extra warmth and adds to the already decent bass performance. Mids and vocals sound accurate but they still sound a little on the sweet/warm side. The treble is about the same as other source gear and it performed the same to my ears. The staging was average(but wide) and imaging was spot on. A good pairing but it doesn’t have much of a sound effect from the small changes as some other IEMs I tested.

Eversolo DAC-Z8/SMSL SP400​

This combo is what I use to review all my current audio gear with. I found the DZ4 did sound a little more lively from my desktop stack. This might be due to the more powerful amp playing well with the 3 DD setup in the DZ4. I however got the same or close to the same results from my DAP as well. So I think an entry level DAC/amp will be good enough.

Overall thoughts​

I do like the DZ4 and I’m interested to see what they can do with this design if they pursue it going forward. A Semi-open design is always neat, even if it’s not quite a traditional semi-open setup. I don’t normally like safe tunings for entry level since it doesn’t normally do anything special. This is still the case for me. I don’t think the tuning is anything special but I do like the way it sounds and I have no issues with the DZ4 that I can think of. My preference for something unique in the ~$100 price range is just a preference and the DZ4 does perform well overall. As such! The DZ4 is an easy recommendation for those hunting a safe yet well balanced neutral tuning. LETSHUOER is willing to think outside the box and try new designs with their IEMs and I really like that mindset. I can’t wait to see what they come out with next! Thanks for reading!!!

Review Of The LETSHUOER DZ4​

Introduction​

Letshuoer is a well-known company that manufactures electroacoustic products. Founded in China, the company has produced many well-known and highly regarded IEMs such as the EJ07M, Galileo, and Cadenza, and continues to delight audiophile fans with their dedication to delivering faithful sound to their listeners. They recently released their new IEM, the DZ4, with a unique configuration never before seen in this audiophile realm, which I will be reviewing today. But before we go any further, I'd like to address a few issues.

Disclaimer​

*Since this unit tour was organised by the kindly people at Letshuoer, I am grateful to them. And as I've said in all of my evaluations, the same is true for this one: all of the concepts I've expressed below are entirely my own, original ideas that haven't been influenced by anyone else. If interested, go to this link.
*I am not associated with the connection, and I receive no financial assistance from anyone.
*For the remainder of the review, I will refer to these IEMs as “DZ4.”
*I am using different Ear-tips for convenience and better versatility.
*Finally, I will only evaluate the DZ4 based on their performance, even though I will explain how it feels and seems physically and aesthetically.

Specification​

The DZ4 contains four drivers, three dynamic and one passive, which are linked by a four-way acoustic tube and a two-way crossover circuit. The dynamic drivers are titanium dome 6mm dynamic drivers, and the passive radiator is also a 6mm unit. The shells are made of resin, and the faceplate is a CNC-milled anodized aluminum casing with a semi-open design. The shells are light weight and feel very comfortable in the ear; however, listening for a longer session causes fatigue. The cable is a four-core, 216-strand silver-plated copper cable with a 3.5mm termination single-ended plug on one end and a 0.78mm standard dual-pin connector on the other. Other accessories included with the package include a carrying case and six pairs of eartips of different types and sizes. The impedance is 12 Ohms, and the sensitivity is 104dB, according to the technical specifications. The frequency response ranges between 20Hz and 40kHz.

Sound​

The response of the DZ4 fascinates me because the overall presentation is neither new nor unique, yet it sounds so right in every way, especially when only dynamic drivers are pushing such intricate details. Without a doubt, these will easily compete with other IEMs in this price range and higher. The drivers do have a questionable effect in some areas, which I will explain later, but aside from that, it sounds almost perfect for my taste, which is neutral with sub bass boost. The response that follows does sound thin, but only in the sense that it maintains tonal decency and tries to sound natural regardless of whether it is bass, mids, or treble. The use of its drivers, which are three dynamic drivers and a passive radiator, distinguishes this IEM from others. The dynamic drivers provide a non-artificial sound that never allows the signature to sound off or strange, so no need to expect any off timbre or sibilance, I assume. When compared to IEMs like the Quartet and Kima, I find this to be more faithful to reproduction.But let's see what else it has to offer and dig deeper.

Treble​

When it comes to treble response, the DZ4 sounds energetic and expressive, even if there are some nuances that I find a little off due to its tuning, which is explained by what it has achieved thus far. It doesn't matter because the entire treble is detailed and clean. The upper treble is adequately extended, with clean and crisp details, particularly the cymbal crashes, which deliver a non-offensive sound while sounding expressive. Of course, either instrument sounds intricate and forward, but the vocals also seem to shine with good exposure in the mix, though they fail to stretch far enough to fill the entire response of upper treble sounds. This type of response reminds me of 7Hz Legato and Kima, but it provides different details. The lower treble is exciting and precise, with light notes that appear lean but keep the response as tonally decent as possible. The vocals sound forward and vivid, and the instruments sound prominent in the mix, not interfering with but complementing the vocals, keeping the sound vibrant and energetic. Overall, the overall presentation of the treble region sounds intricate, vibrant, and exciting.

Mid Range​

The mid range is extremely well tuned, with just the right amount of energy that I find enjoyable to listen to, though the nuances I mentioned make it a little difficult to sound right for me. Everything about the energy and positioning in this region sounds fantastic. The vocals and instruments sound a little light, which would have been more enjoyable to listen to if there was more warmth in the lower mid range, though I believe this level of clarity would not have been possible if that was the case. The upper midrange is as energetic and exciting as the lower treble, and it maintains the engagement. Because the presence is more dense, the delivery of the vocals and instruments makes it sound more expressive while also sounding a little more tonally acceptable. Now, the vocals may come across as forward and full of energy; the female vocals may be a little too strong for some, but the male vocals sound fantastic. The'ss' sounds are occasionally audible while listening to energetic vocals. The same is true for the instruments, as their response complements the vocals while keeping the response free of any overbearing or clustering mess in the mix. Though the clear response of the vocals and instruments may sound captivating, I prefer a little more dense response that may bring more warmth in the response, though I do not find it unnatural. The vocals and instruments have a clean response with no wobbling sounds or thick dense sound in the mix. Overall, the mid range is expressive, forward, and energetic.

Bass​

I feel the same way about the bass as I do about the midrange, as the response is to my liking with no complaints. However, when considering everyone, I believe the mid bass may lack the weight and organic vibe. When it comes to emphasis, the sub bass is heavily emphasized, whereas the mid bass lacks a lot of presence, though it is noticeable. According to the graph, the DZ4's fourth driver, the passive radiator, should've brought a lot of sub woofer-like bass into the mix with the bass dynamic driver, but it surprisingly sounds very clean and detailed. The reaction is very clean and precise; the punches hit you hard and quickly retract; it is strong but not heavy. The sub bass extension is deep, with a subtle rumble felt in the ear canals. The presentation maintains the flow of interest, making it sound conclusive. The bass delivery of this IEM is a unique experience, even though I was mistaken in thinking that the passive radiator doesn't provide that sub woofer explosive bass, but when only lower frequencies are heard, it radiates it so finely and brings the lows alive, where the sensation of rumble exponentially increases and gives a very thunderous response, which I find thrilling. When it comes to the mid bass, the bass lacks the slam and thick thumps that some may find lacking in organic response, which I agree with, but the bass guitar keeps the notes dense enough to make it sound natural, and the drums have the physicality of its frequencies. However, some would have preferred more warmth in the mid bass; the mid bass does not bleed into the lower mid range, which I find disappointing; if it did, it would have made it sound much better. The bass texture and details are fantastic. The bass region's overall performance is detailed, sub bass focused, and clean.

Technical Performance​

The DZ4's technical performance is actually good for the price, as it competes with other IEMS in this price range, particularly the Legato and the Quartet. The stage is large and open, with good separation between elements and clear imaging. The resolution and details are excellent, and the resolvability is fast.

Soundstage, Sound Imaging & Separation​

The soundstage is wide but not very deep because it is set on a flat plane rather than a 360-degree space, but the response is very spacious sounding. The separation between the elements is distinct, making them far enough apart to easily determine which direction their sound is coming from. The imaging is clear and sharp, which is excellent because a more complex response could have introduced irregularities.

Speed & Resolution​

The details, whether micro or macro, have a very expressive nature, which I find very up front and staggering. The attack and decay of notes are paced very quickly, resulting in a clear and transparent response.

Sound Impressions ​

Sources​

Tempotec V6 - When listening with the V6, the treble felt more energizing, while the mid range maintained the same level of energy. The bass sounded more controlled and clear, which I thought was a little weak. The overall energy was sufficient to allow the full pontential to emerge from the DZ4, but it sounds too lean for my tastes. The technical aspects remained unchanged, but the stage felt larger and deeper. The pairing with the V6 was acceptable but not appealing to me.

iFi Hipdac - While listening with the Hipdac, I noticed a lack of energy in the treble and midrange, which made the sound more pleasing while retaining as many details as possible. To me, the vocals sounded more natural, dense, and rich. The bass was more prominent throughout the region, particularly in the mid bass, which felt warmer and more natural. The stage, imaging, and resolvability seemed to suffer as the stage became more intimate, and the details weren't as sharp or expressive as they had been. However, I find the sound more appealing and pleasant, so the response is both acceptable and likeable to me.

Tracks​

Luna Haruna - Glory days
Luna Haruna - Overfly
Rokudenashi - The Flame of Love
LMYK - 0 (zero)
ORESKABAND - Jitensya
Marina Horiuchi - Mizukagami no Sekai
RADWIMPS - Suzume
Indila - Love Story
Indila - Tourner dans le vide
Earth, Wind & Fire - September
Tom Petty - Free Fallin'
Fleetwood Mac - Everywhere
Nirvana - Smells Like Teen Spirit
Blue Oyester Cult - (Don't Fear) The Reaper
Guns 'N' Roses - Sweet Child O' Mine
The Police - Every Breath You Take
Gojira - Amazonia
TV on the radio - Wolf Like Me
Bring Me To The Horizon - Can You Feel My Heart
Bring Me To The Horizon - sTraNgeRs
Avril Lavigne - Dare To Love Me
Travis - Love Will Come Through
Gotye - Somebody That I Used To Know
DJ Shadows - Six Days (Remix) [feat. Mos Def]
Lady Gaga - Just Dance
Lil Wayne - Lollipop
Flo Rida - Low
Sebastian Lopez & Flug - Electronic Measures
Federico Mecozzi - Blue (Da Ba Dee)
Wayve - Not Enough
Kai Wachi & TeZATalks - Ghost
NGHTMRE, Zeds Dead & Tori Levett - Shady Intentions
Zeds Dead, DNMO & GG Magree - Save My Grave
Skrillex, Noisia, josh pan & Dylan Brady - Supersonic
Skrillex & Nai Barghouti - Xena
Skrillex, Missy Elliott & Mr. Oizo - RATATA
Kaifi Khalil, Eva B & Wahab Bugti - Kana Yaari
A.R. Rahman, Javed Ali & Mohit Chauhan - Kun Faya Kun

Conclusion​

To summarize this review, I believe the DZ4 is a worthy competitor in this price range, particularly when it sounds like what I prefer, neutral with sub bass boost. If you're looking for a neutral sounding IEM that brings out great vocal energy with great details and a captivating response, this is the one to get. However, I prefer and recommend that everyone try these because of how well the dynamic drivers are tuned and integrated.

Prelude:
There has always been a lot going on in the headphone market, but manufacturers of IEM headphones, i.e. universal in-ear monitors, are constantly competing with each other in interesting ideas. Letshouer is a brand known for impeccable workmanship, exemplary approach to its products and innovations. This time they served us a quite unusual design, because their latest DZ4 model consists of as many as three dynamic drivers with a diameter of 6mm and an additional passive radiator with a diameter of 6mm, which, thanks to the semi-open design, is designed to strengthen the whole transmission. It’s all packed into a small resin case and priced at $89. It’s not an easy price range because the glut of products under $100 is huge.


Unboxing:
When it comes to unpacking, we have a cardboard box made of slightly cheaper materials than those used to produce the S12PRO packaging. However, it is still very pretty and attractive. Inside we find our headphones, a nice matte and tightly screwed case in the shape of a can, covered with rubber on both sides. It is nice and has the manufacturer’s logo on the cap. However, it is hard to finger and does not protect the headphones from scratches inside. Still, in this price range, the mere presence of a case is a feat, and the more the addition of a case of this class deserves huge applause. In addition, we find a couple of information leaflets, a great braided cable 3.5mm – 0.78mm similar to that of the gaileo model. And three pairs of vocal and balanced tips. Although in my opinion DZ4 are not particularly sensitive to tips. The set is complete and functional, personally I would only give at least one pair of wetsuits, but they are not mandatory for this tuning.


Sound:
DZ4 are headphones strongly focused on a specific style of musical presentation. They are very close to neutral with a slight mutra of warmth. They don’t play bass, instead they maintain a beautiful tonal balance. So let’s move on to a slightly more detailed description of the sound. Their extreme opinions are caused by rather unusual in this price range „audiophile approach to tuning”, instead of entertaining and warm, which is quite rare and may cause that many people did not expect such a move. After all, audiophiles with much more expensive headphones certainly began to look for similarities, and users of cheaper musical models were looking for the same. In my opinion, however, the DZ4 is a unique product that deserves a lot of recognition. First of all, because of its unconventional and correctness. It’s a specific sound for a specific audience. So who is the recipient and what is the sound you will find out in the next part of the article. So I invite you to continue reading.


Bass: Low tones are neutral, slightly warmed in the sub-bass, there is little mid-bass. Which translates into a certain sense of contour, but it is not a defect. Such a procedure helps to strengthen the analytical and technical nature of DZ4. Yes, the DZ4 are not overly selective, but they remain coherent and well-tuned. Bass is present, but still linear and does not stand out above the overall musical presentation. I will not agree with the opinion that the DZ4 does not have bass, but these are not headphones for lovers of low tones. They have much less bass than the s12pro. Its structure close to neutral works great for music monitoring. This is a rare and innovative approach in this price range. However, if the midrange of the bass was slightly strengthened, on the one hand, the whole would gain weight, but on the other, it would lose its analytical and unusual in the positive sense of the word transmission. These are headphones that play as the artist intended.
Diameter: DZ4 focus on direct and clear musical transmission, especially in the field of female vocals. The males are also well realized in a very direct way, but it is the female vocals that gain extra magic with a bit of warmth in the sound. Imaging and separation are at an average level, but in this price range it is acceptable and correct. When it comes to the separation of instruments, it is just right and it is not surprising that the headphones themselves sound above average well for their price and cannot be outstanding in every context, because investing 89 USD and not 200 USD we have to take into account a certain compromise. In this case, it will be a compromise in terms of instrument separation. However, what I want to emphasize is that the DZ4 still has good imaging, which does not stand out above the price, but is not a disadvantage either. This allows you to reduce the feeling of fatigue and just relax listening to your favorite music.

Treble: The treble is present, but due to the strong neutrality, it does not stand out above the whole, so we can have the impression of their reduced presence. It’s not that the DZ4 doesn’t have treble, because it is present. It’s more about how they’re set up. In rock or pop music, it brings very good results, eliminating the feeling of fatigue or sibilants. The soundstage is of average width, but with a nice and good depth, which I personally like a lot. The highs are clean and smooth to show our favorite music, plus we don’t have any impurities or sibilants here.


Comparison:

Letshuoer DZ4 ($89) VS Letshuoer S12PRO ($139)
At the beginning, I would like to point out that comparing planar and dynamic headphones is hard. The S12Pro are more resolving, faster, but at the same time they have strongly withdrawn vocals, which is not present in the DZ4. Of course, the S12Pro are more expensive and better headphones. However, if you have a limited budget and want to buy something neutral and entertaining, the DZ4 will be a good choice because they are a bit easier to listen to and do not require such a powerful amplifier.
Letshuoer dz4 ($89) VS QoA Vesper 2 ($79)
QoA are headphones with more detail, but also less neutral and balanced tuning. It’s all about our individual preferences. More bass will definitely be QoA Vesper 2, but if we are looking for a quiet tuning, it is worth reaching for Letshuoer dz4.
Letshuoer dz4 (89USSD) VS BQEYZ topaz (89USD)
Topaz are very good headphones that I really like. However, they are very bassy and have almost subwoofer bass. Their scene is similar to DZ4. The DZ4 are definitely more balanced, neutral and calmer in presentation. If we are looking for a quiet tuning, we will find it in the DZ4, and if we prefer entertaining and spectacular tuning, then the topaz will show more claws.


Summary:
The Letshuoer dz4 at $89 is a great deal. Great accessories and beautiful neutral tuning with minimal warming make them a great deal if you appreciate a calm and balanced tuning. The build quality is phenomenal and the quality control is excellent, which makes me strongly recommend this model. I was also surprised by the good isolation despite the semi-open construction of the headphones. It is worth considering buying the DZ4 if you are looking for inexpensive headphones to work with music or if you like neutral tuning. Let’s not look for $200 sound here, but remember that there are still few innovative headphones under $100. Thus, the DZ4 are a kind of unique, taking into account their advanced design and stunningly good build quality. In my opinion, it is worth taking a closer look at them and listening to them with your own ears.

TLDR version on YouTube: TDLR - Letshuoer DZ4

The Letshuoer DZ4 has been sent to me directly by Letshuoer in exchange for me to try it out and share my impressions in this review. Letshuoer have not made any requests or comments and I will do my best to be as unbiased as humanly possible.

You can find the official page for the DZ4 here: https://letshuoer.net/products/lets...ngle-passive-radiator-edc-hifi-in-ear-monitor

As always, this is a non-affiliate link.

To avoid being repetetive in my reviews, you can find all the info about how I create the reviews, equipment used, how I receive the products and how to interpret my reviews by visiting: About my reviews



Intro…

I first heard the DZ4 back in Munich, or at least I think I did, as my current impressions are slightly different to what I remember. This could be due to the fact that I listened to a lot of stuff in Munich and have listened to a lot more since, but I just remember the set being darker when I listened to it back then.

That is not to say that the DZ4 that I have is bright, I will get to my sonic impressions soon, just that it doesn’t seem to be as dark as I remember.

The DZ4 is a set that features 3x 6mm Titanium Dome Dynamic Drivers, along with a 6mm passive radiator. The addition of a passive radiator is an interesting concept, yet it seems to be implemented in a way that is different to what I would expect for a passive radiator. While I do not proclaim to be an engineer, far from it, I have had experience with the implementation of passive radiators in speakers and subwoofers in the past. I even put one together myself for a bass cabinet some time ago, after a lot of trial and error in WinDSD.

Without getting too far into the science behind it, let me briefly mention what a passive radiator is. It is basically a speaker that does not have a voice coil or magnets etc. and does not produce any sound on its own. In other words, you don’t connect cables or an amplifier to it as it is sort of a dummy speaker. This is used, at least in my experience and understanding, instead of a port in a speaker (the hole that lets air in an out) and allows more response in the bass ranges in comparison to a simple sealed cabinet design, although with a steeper roll off. There are obviously a lot more scientific things going on behind this simple explanation but I wanted to just share the basics.

Why am I saying this? Well, in the case of the DZ4, the passive radiator is not actually in a sealed enclosure (the IEMs are semi open), meaning that the way it is implemented is different to what I have learned about the implementation and functionality of this set up. While I can’t say exactly what the passive radiator is responsible for in the case of the DZ4, it would need to be compared to the same IEMs without the radiator, I will say that there doesn’t seem to be an extra boost in the bass and the roll off is not really steeper, in fact, if anything, it is less than on a lot of other dynamic driver sets.

Anyway, enough rambling on about what should and shouldn’t happen, let’s get on with reality and what my experiences have been with the DZ4.



Presentation…

The packaging and contents of the DZ4 are very respectable for a set of IEMs that cost around 80€. The external packaging is a simple white but elegant box, covered by a white sleeve that has some modern looking designs on it and basic info about the set.

Opening the box we find some paperwork under which the IEMs are sitting in their respective foam cutouts at the top, with a large round storage case below. I say storage case because it is rather large to carry in a pocket (although you can obviously transport the IEMs in it). The case is made of a plastic with a satin finish to it, which feels quite nice. The top screws off which is a nice touch but also takes many turns to open, which is not really a complaint but does mean it takes a little longer to open.

Inside the case we receive the cable, which is a very nice cable at that, along with a circular disc that holds 5 sets of tips, plus the ones installed on the IEMs themselves. The tips are labelled as “Vocal” and “Balanced”, 3 sizes of each. Personally I found I preferred the “Balanced”, as the “Vocals” tend to give a little extra harshness to the upper mids, something I find works against the sound presentation that the DZ4 are going for.



Build and Aesthetics…

The IEMs use a shell that looks like plastic, although it is shown by Letshuoer as being anodized aluminum. The shells are a creamy colour with a bit of a pink hue to them, with a metal face plate which has an aluminum finish to it, also with a hint of pink (matching the hardware of the cable). The face plate features a Z shape cutout with a red grille behind it and I have to say that I am a fan of the aesthetics. They look original and are not too “loud” about being different.

The nozzles are rather large but not large enough to cause any issues, at least for me, and in general I find the IEMs to be nice and comfortable. I spent some long sessions with these IEMs and found no issues with comfort at all but, as always, everyones ears are different.

The cable is reminiscent of the cable I received with the S12, although a little thinner and less bulky, something that I prefer. The IEMs use a normal 2 pin connection and in this case, the cable is terminated in a 3.5mm unbalanced connector. While some will miss the balanced option (which is easy to swap to), I have actually found that, when testing with a balanced cable, I didn’t really find the results to be an improvement over the unbalanced. In fact, as with the “Vocal” tips, the small change moving to balanced I think, again, works against the vibe of these IEMs.

In general they are well built, look good and are comfortable IEMs (all to me personally of course).



Sound…

All tracks mentioned are clickable links that allow you to open the reference track in the streaming service of your choice (YouTube, Tidal, Qobuz, Spotify, etc.)

Let me start off by saying that these IEMs have a vibe to them that I like but in certain contexts.

I have said many times that a lot of the music I listen to is simple vocal centric music with simple acoustic instruments and I find that the DZ4 give a special flavour to this. These are not the most detailed of IEMs, I don’t find myself focusing on string attack of guitars nor on minute details happening in the percussion section. I find them more relaxed, smooth, with a habit of making simple things sound a little fuller and more “rounded”. They sort of have a warm sound to them when reproducing simple stringed instruments but without the additional presence of bass.

Let’s take a look at the graph in comparison to my usual preference target as a reference:



You can easily see that they are close to my target and that is something that obviously puts them off to a good start for me personally. However, while I have no disagreement with the tuning, nor do I doubt it is very close to my preference target, I do find that the presentation is very different to the usual more clean and neutral response that the majority of IEMs tuned in this way present.

It is difficult to explain with words but to use a reference that I have used sometimes in the past, it is a similar presentation to a set of Sony speakers that I have had for many years. They (the speakers) are not the most detailed nor impressive of presentations, yet they have a relaxed way of making things seem warm and smooth (again, without additional bass presence). It is similar in some ways to that extra vibrance that a tube amplifier adds, where the frequency response may remain the same but the sensation is of more body.

This is something, as I just said, that I find works very well for my usual preference in music. Adding flavour and intimacy but without losing soundstage or presence. In this regard I have enjoyed the DZ4 very much.

However, moving over to my usual detailed listening session and focusing on my list of test tracks (available here, as always), these things that are beneficial to certain music I find to be detrimental to others. They can actually make the lower end sound thin and almost as if phase cancellation is occurring. So, to keep things consistent with all my reviews, here is what I experience when putting them through my usual tests.

Subbass is not rolled off but I would say that, for those looking for a bass head presence, these are not going to fit the bill. While I don’t find the subbass to be too weak for my tastes, in fact it is over my reference on the graph, the DZ4 does not give a sensation of a huge presence in the lowest of notes. “Chameleon”, as my usual reference, is not a track that I find to be impressive on the DZ4. There is rumble but it is not the cleanest and I get the sensation of more presence due to that than due to the amount of subbass per se. I would much prefer more presence but cleaner (or the same presence but cleaner).

Midbass is something that goes the same way. As far as the quantity, I find the DZ4 to be leaner than I would have guessed looking at the graph. Again there is some body to the bass on simpler tracks, with that almost pseudo-harmonic sensation, but with “Crazy” as an example, I find the lower end of the guitar to be a little boomy but lacking in presence at the same time. This is a sensation that I have not come across before in IEMs.

Moving to something more electronic, like “No Sanctuary Here”, again I find the bass to seem to lack presence yet still be a little out of control. It is not terrible, by no means would I say that the bass is loose and boomy, but I get a similar sensation to “Crazy”, where the bass seems to fill out but not present itself in a way that impresses those looking for a great bass hit.

The mid range is something that works much better for vocals and acoustic instruments than it does for electronically produced music. With something like “Sun Is Shining”, there is again this pseudo-harmonic response that makes things seem a little unclear and thin, whereas a track like “Happens To The Heart” the vocals get a lovely smooth body to them, the same with vocals by Dominique Fils-Aimé in “Strange Fruit”.

The upper mids depend on the tips used and here is where I found the “Vocal” tips worked to bring vocals forward and provide them with a little more clarity, for example “Whole Lotta Love”, whereas the “Balanced” tips sort of merge the vocals into the lows and mids on that track. While I would say that bringing vocals a step forwards may be beneficial, as I said before, it seems to work against the overall presentation of the DZ4. I find that when vocals are brought forwards, it makes them stand out against that smooth bodied signature, making them seem harsher than they actually are.

As we get into the upper ranges, the treble is quite tame and again smooth but with a slightly “off” sounding timbre. There is no sibilance, both “Code Cool” and “Diamonds On The Soles Of Her Shoes” are tamed in this regard, yet I do find that the upper ranges of pianos can come across a little unnatural. This is mainly because, in my opinion of course, the upper ranges don’t seem to have that same pseudo-harmonic sensation that the lower ranges do. This means that when instruments that extend well into the higher ranges, such as the piano, have a tonality that is slightly different to the tonality of the same instrument in the lower ranges. I don’t think that this is because the treble is actually wrong in it’s tonality, just that it is different (possibly more natural even) than the lower ranges, creating the sensation that something is not quite right.

Soundstage is decent. I wouldn’t say it is huge but it is above average for a set of IEMs. However, that extra body makes things sound fuller and as though there is more space around you, which, again, works very well for acoustic instruments and vocals. Detail and image placement is not great but I don’t feel that it is due to it lacking, more that it is smoothed over giving a general presentation rather than individual image placements for the smaller details.



Conclusion…

The DZ4 are a set of IEMs that I have enjoyed immensely for my day to day listening, where I found myself enjoying album after album of acoustic music from many artists. That feeling that there is a bit of tube flavour (sorry but I can’t think of a better description at this moment) going on in the lower and mid ranges is something that I find enjoyable for relaxing and enjoying the music. However, when moving over to specific more detailed listening tests with other genres, I didn’t feel that they were quite as enjoyable.

To be honest, I don’t think this is necessarily a bad thing at all. They may not be an all-round detail focused IEM but there are plenty of those already on the market, it is nice to see a different approach to the presentation of music.

I honestly think that if you are someone who mainly listens to vocal centric and acoustic stringed instruments, then the DZ4 are something that you are really going to enjoy. If your tastes lay in other genres and/or you are focused on detail retrieval, then maybe look elsewhere.

By no means is this a negative review, in fact, if I were to review these as a consumer with my tastes, I would say these are excellent. However, reviewing them from the viewpoint of a reviewer, there are things that are to be taken into consideration.

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As always, this review is also available in Spanish, both on my blog (www.achoreviews.com) and on YouTube (www.youtube.com/achoreviews)

All FR measurements of IEMs can be viewed and compared on achoreviews.squig.link

<small>All isolation measurements of IEMs can be found on achoreviews.squig.link/isolation

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Disclaimer:
- I don’t read FR graphs. I only use my ears, as how earphones should be used.
- Letshuoer sent this unit to me in an exchange for an honest, unbiased review. Rest assured that this review will do its best to devoid from any bias/es as much as possible.
- The following remarks and observations shall be made and owned only by me.
- No monetary compensation is/was involved before, during, and after the period of creation of this review.
- Your mileage may (and always, will) vary.
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(Additional note here: I have seen some discussions regarding this IEM’s unusual configuration and its implementation. I have to admit that those discussions are not my forte and will not be the focus of this review. I will review this IEM just like how I usually review my IEMs: hearing them personally and telling everyone what I hear.)
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Burn-in time: 4-8 hours per day, 5 days.

Source/s used:
- Hiby R3 Pro Saber
- Fosi Audio DS1
- Non-HiFi smartphone (Infinix Note 12 G96), PC.
- Local Files via Foobar, YouTube Music, Deezer, and Qobuz with UAPP.

IEM/Earbud/Setup configuration: stock large eartips, any form of EQ or MSEB off, 3.5 SE plug, 40-60% volume, low gain and high gain.
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Sound signature:
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- The Letshuoer DZ4 exhibits a somewhat “neutral” sound signature, with a noticeably forward mids, which makes it “midcentric” in sound to my ears. This certain sound is one of the unique ones under 100USD in my humble opinion, along with the Truthear Hexa and Celest Pandamon.
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Lows:
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• - The lows here in the DZ4 are fairly controlled, clean, have equal levels of midbass and subbass, and decay quickly. In some instances, the texture may lack and may sound “monotonous” to some. The DZ4 definitely is nowhere near enough for it to be a basshead IEM, but it caters most tracks, particularly the bassy ones quite nicely.

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Mids:
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• - This is where the highlight of the DZ4 is at - its forward, clean, lively mids.It managed to exhibit a somewhat lush, non-fatiguing timbre while keeping sufficient details during my tests. Lower mids show a good amount of thickness and texture. Some would prefer a thicker approach in this region but I’d say that the thickness of the lower mids of this IEM reminds me of my Etymotic ER3SE. It is close, but not quite because the the mids of the ER3SE sounds more natural and uncolored. Upper mids are forward, showing very good clarity, air, and sparkle. Despite being forward, it never sounded sibilant or harsh to my ears. However, in very rare cases, it may sound “shouty” to some sensitive ears. Overall, I love how the DZ4 presented the mids as it reminds me of a somewhat similar approach just like the Etymotic ER3SE and ER2SE sounded to my ears. But if you prefer the profile of the mids of most recent IEMs at this price, you may find this “odd”.

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Highs:
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• - As for the treble, it is well extended and has a good amount of presence albeit not being the highlight of the DZ4. It isn’t as airy as what I would prefer, but it doesn’t sound dark to me nor lifeless either. It managed to avoid any form of harshness and sibilance in this area, while showing a very good amount of macro and microdetails for its asking price.

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Soundstage, Imaging, and separation:
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• - The soundstage is the first thing that I have noticed in this IEM, along with its forward mids. The stage is rather intimate in width with a very good amount of height and depth. The DZ4’s soundstage isn’t compressed nor cramped by any means, and it is comparable to the Truthear Hexa’s soundstage. Layering and separation is average for its price as it is able to render heavy passages neatly most of the time. Imaging is above average in my opinion and leans to the precise side of the spectrum rather than accurate.

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Comparisons!
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VS Simgot EA500 (Black nozzle filter)

• - The EA500 is noticeably brighter and more neutral in the mids when compared to the DZ4. With that being said, the EA500 is also more prone to sibilance and peaks unlike the DZ4. Lows are a bit thicker on the DZ4, but the EA500’s bass is cleaner and tighter. Technical performance is better on the EA500.

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VS Truthear Hexa

• - The Hexa is better on bass performance, particularly on the quantity. Mids are more upfront on the DZ4 but very negligible unless compared side-by-side.The Hexa has an airier and more extended treble as well. Technical performance is better on the Hexa except for the soundstage as that is the region where the DZ4 and Hexa are more or less the same in terms of width and depth.

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VS Celest Pandamon

• - The Celest Pandamon is thicker and more balanced in sound when compared. It has better lows in terms of both quantity and quality while not sacrificing any speed and detail. Mids are a tad bit forward on the DZ4 but the Pandamon has its mids thicker. Treble extension and air of the two IEMs are more or less the same. Technical performance goes to the Pandamon, mainly because of its Square Planar Driver (SPD) and versatile tuning.

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VS Simgot EW200

• - The Simgot EW200 is definitely more airy, engaging, spacious, and technically competent when compared. The mids on the DZ4 are more forward compared to the EW200, but the EW200’s mids are more “well-placed”.Highs are definitely brighter on the EW200 and are more prone to sibilance. The soundstage is definitely wider and taller on the EW200. Layering, separation, and imaging are miles better on the ew200.

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Pros:

• - Unusual“neutral-midcentric” sound signature.
• - Very good, detailed, forward mids!
• - Controlled, adequately thick lows.
• - Non-fatiguing upper frequencies.
• - Average technical performance.
• - Unique IEM design! (highly subjective)
• - Matte, pseudo-rubbery finish (subjective)
• - Very good fit, comfort, and isolation.
• - Visually-pleasing packaging and accessories!

Cons:

• - The overall sound may be perceived as “thin/lacks body” to some (but if you are a fan of Etymotic type of sound, it’s alright, more on that later).
• - The stock eartips do not isolate well (highly subjective)
• - Female vocals may sound “too forward” on some tracks.
• - Bass may lack texture at times.
• - Mids may sound “too forward” to some.
• - Soundstage is intimate.

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It’s quite refreshing to hear a sound like the Letshuoer DZ4 has. While may not be the best in technicalities and timbre for its asking price, what made this IEM stood out or at the very least make this unique among the rest is its forward, lush yet detailed mids which is quite rare in today’s saturated, harman-dominated Chi-Fi market. Do I recommend this IEM? To me, it depends on what type of sound you prefer within the 100 USD range. If you want a mid-forward sounding, non-fatiguing IEM with a quite unique design, consider the Letshuoer DZ4 as one of your choices!

Pairing recommendation/s:

• Source: This sounds just fine when plugged straight to a phone, but is vastly better when used with a proper source.
• Eartips: The eartips are alright and enough for the most part. However, it did not fit my ears well. You may always use your preferred eartips. I find the KBEAR 07 eartips work well with this IEM.
• Cable is really good, and robust. You may always use your preferred cable.

Thank you for reading!

Non-affiliated product link here!: https://letshuoer.net/products/lets...ngle-passive-radiator-edc-hifi-in-ear-monitor

Additional Photos Here:

Introduction!
Today we’ll talk about headphones from LetShuoer, the model is called DZ4 and their cost is $89 !!!
They come in such a very attractive medium sized white cardboard box, and on the front there is the letshuoer logo, the model name is dz4 and such an interesting drawing with circles that reminds us that this model uses 4 drivers, and of course there is a logo hi-res audio.

Well, at the back, the technical characteristics for the sound are 3 6mm dynamic drivers, and one 6 mm passive radiator, and the sensitivity of the headphones is 104 dB and they received 12 ohm impedance.

Let's take a look at what's included.
Now let's look at the package in more detail.
And the first thing that greets us is a product certificate, a card with advertising of the company's social networks with scanning QR codes, and a card with after-sales service, well, this is a rather beautifully designed instruction manual and cable connection in three languages.

Well, here these wonderful headphones are very neatly located and they look quite attractive for my taste and they have such a beige color of the case itself and they are quite light, and they are made of a very smooth and pleasant resin made to order by HeyGear, and in front they have such a metal an insert with an orange grille and a pattern, which we also saw on the box, and they also have a standard 2-pin connector next to which the inscription dz4 letshuoer and the marking on the right and left earphone, respectively, and this is how their nozzle looks and here you can see three such holes, two are slightly larger with a white mesh inside, and one is of a smaller diameter.

Ergonomics and convenience.
Well, as for the fit, everything is in order here, they fit very tightly to the ear and provide excellent sound insulation, you can use them for literally hours.
Accessories and handy organizer.
Well, in this black jar there is an excellent 4-core copper cable, which I immediately liked and it definitely makes no sense to change it, it has 216 threads and a silver-plated coating and 2-pin connectors are installed, and very conveniently shaped earplugs and a standard jack connector 3.5 mm.
Well, in such a convenient organizer there are branded ear pads from lethuoer, such black vocals and such balanced vocals are more dense and I recommend using headphones with them.

How do these headphones sound ?
Well, now friends, let's talk about the most important thing, namely the sound of this model !
Low Frequencies :
At low frequencies, the headphones demonstrate a very precise and neat and cheerful rise with a great emphasis on the sub bass, which has excellent weight and volume filling the space, and I was very pleased with the smooth and well-controlled transition to midbass, due to which the bass is perfectly controlled and literally allows the middle frequencies to breathe and open up completely without interfering with them.Yes, of course it's worth saying right away that I was very worried about the midbass that it wouldn't really be enough for me, but in fact everything turned out quite well for me since the mid bass is quite dense, assembled and attacking with good textural elaboration, but of course it doesn't feel super massive, especially if you switch to these headphones after more bass models with a more pumped mid-bass, and at first it will really feel a little strange and unusual and the bassheads will definitely not have enough punch here, but for all the other guys who are familiar with this setup it will be just right.
Mid Frequencies :
Well, the midrange frequencies in these headphones are a real madness stunning from the first listening, they are insanely smooth and correct and clearly focused, I would say that this is literally their calling card, there is also an insane transparency and airiness because of which everything sounds clearly separate and detailed on overtones, there is no box effect or closed space,this whole range literally breathes, and despite the fact that it is very smooth, it did not get excessive overt monitoriness and dryness because of this, but on the contrary everything sounds exciting and emotional, you literally live with music.
And the vocal part is just wonderful that male and female vocals are very clean and insanely transparent and clear, and of course it's worth saying that it's immediately noticeable that the vocals focus on themselves and are pushed forward along with the drum part and everything sounds literally next to you and this gives a very pleasant immersion effect and additional bounces due to clearly emphasized percussion drums that have excellent transients.
High Frequencies :
Well, high frequencies have a very good and correct approach to tuning, there is also sufficient technicality and there is a good bias in analytics and there is a good amount of air for better separation of cymbals and percussion in this range, and of course it is worth saying that headphones are great for heavy and high-speed genres that require a good attack and very little pleasant by ear underlining plates, I am glad that they do not merge the sound into a porridge and a single whole, but on the contrary, on the tops of all the plates, each long after-dinner sounds very detailed and separate, that is, the images are not lost in the mix and are drawn very accurately and informatively.
Stage and stereo panorama :
In Letshuoer DZ4, in my opinion, everything is in perfect order here, the scene itself is wide enough and has an excellent slope in depth, that is, the space and instruments do not feel flat, but on the contrary have good weight and volume, and all images are drawn in great detail and separately from each other.
My conclusion on these headphones :
LetShuoer Dz4 turned out to be very interesting emotional accurate and quite technical headphones that give only positive emotions, yes, it's definitely worth saying that they do not have the most typical tuning at low frequencies for fans of powerful mid-bass punch and basheads, but otherwise everything is in perfect order!

Icygenius was with you, I will be glad if you subscribe to my YouTube channel and watch this full review on Letshuoer Dz4!
Review: