LETSHUOER DZ4

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.