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.
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.
4/5
Pros:
- Shell quality and materials are exceptional
- Premium packaging
- High quality cable
- High quality Tips
- More comfortable than many IEMS
- W-shape tuning
- Layering / image
- 3D sound feeling (on some tracks)
- Good details & vocal focus (mid-centric)
- Easy to drive (you don’t need anything expensive)
Cons:
- It may sound thin at times
- Narrow/intimate soundstage
- Genres and tracks dependent
- Not always pleasant high frequencies