General Information

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Configuration: 10mm+7.8mm Dynamic Driver
Diaphragm material: PU + LCP composite diaphragm
THD: THD@1KHz≤1%
Sensitivity: 117.5dB/Vrms (@1KHz)
Impedance: 10Ω±15% (@1kHz)
Frequency Responce: 20Hz-39500Hz (IEC61094,Free Field)
Cable: Oxygen-free silver-plated

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Latest reviews

Hablmet

New Head-Fier
Truthear Zero: A Complicated Position
Pros: Light, interesting shell design.
Good overall bass impact and texture, especially for the price.
Takes relatively well to EQ.
Stock cable is pretty light and isn't bad for this price range.
Cons: Harman IE is just a bad target for an IEM like this.
Upper mids/treble far too shouty, requires EQ for a lot of genres to sound palatable.
Mids smothered by the bass+treble combo, EQ mandatory to let them breathe.
Crossover recess is not that easy to EQ out and you can sometimes feel that recess too!
Staging and imaging is slightly below average, instrument separation suffers as well.
Zero:Red is just a better buy at five bucks more.
Introduction
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Truthear probably does not need any introduction. Starting off with a bang with the Zero, then the Hexa and then the Hola, neither of these IEMs can be outright called bad or a poor start, as all three sold quite well and with the advent of the Red, it seems that so far, Truthear is on a winning streak. But how does the old Zero now fare in the current market? If you've seen the star rating, in my opinion, it's lost a bit of that luster it needed to last.
This unit was passed down to me. Packaging will be as such absent from this review, as half of it is missing. Ah, the woes of being poor.

Look, build and comfort
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Truthear Zero with the Letshuoer DZ4 cable and puck case.
I cannot deny that the Zeros look quite appealing. That color-alterating resin is always wonderful to look at, and the shells are overall quite light, with a slightly recessed 2-pin connector that might be polarizing, depending on opinion. I unfortunately had to swap the hefty but otherwise excellent DZ4 cable for the Tripowin Zonie, as the connectors on that one were too stubby and were prone to popping out. The shells are quite large and my already slightly smaller-than-average ears had to get used to the feeling of these sizable fellas. There is a bigger problem, however; the nozzle is quite wide and that restricts not only some of my tips being used, but also long-term comfort. On the other hand, the tips that fit on the nozzle ensured a very good seal and fit security (my usual test is vacuuming with an industrial Kärcher at the same time, and these passed the test quite well). For those with smaller ear canals, these might be problematic (and anything else with larger nozzles, such as the Blessing series). Overall, I cannot complain about the looks, but the fit is more polarizing.

Sources used
The usual stuff on my end. For those familiar with my reviews, my usual equipment is my interface (M-Audio AIR 192|4), the FiiO BTR5 2021 and my phone (Poco X3). I tried plugging them into the Moondrop Click for a bit and just stopped as that felt like a very compromised listen. An Abigail dongle or Apple dongle would be far more fitting in this case. All sources needed very little effort to get the Zeros to a high listening level; more so than my previous Tripowin Leás. There were no issues with hiss on any source involved. As this does not fit great into most other sections and would disappear in the Comfort section, my testing involved the KBear 07 tips being used, alongside the stock tips. The 07 tips provided a better grip and fit security for my ears. Your mileage may vary.

Sound performance:
Bass

The bass is absolutely the stand-out performer on the Zero, thanks to the dual dynamic driver setup, with one serving for sub-bass frequencies only. The stock bass performance is quite solid and a great performer in the range; there is plenty of impact, a decent slam and texture is also overall decent. That is not to say that the bass quality is flawless, however; I found the crossover point at ~170Hz to be noticeable in listens and an EQ point placed there resolved that tiny issue. For a typical basshead, this is surprisingly quality bass. Budget sets keep getting better.
Bass rating: 80/100
Mids

This is where it falls apart a bit. As I have mentioned in the quick bullet points at the top of the page, they are kind of drowned out. This is a little unfortunate, as I am a big fan of vocals and this set does them quite an injustice with its stock tuning. Even something more instrumentally-focused such as Battle Tapes kind of sucked listening to, which is a big shame. Vocals feel a bit grating, and overall are not pleasant to listen to, there is no reserved feeling, only aggression. This sort of brings me into the treble...
Mids rating: 50/100
Treble

I hate Harman treble in general. That probably would've been better to state at the start, but given my star rating, I felt it wouldn't have been hard to figure that out. There is, however, a good point about this treble before I go off tearing it a new one, and that is that electric guitars with these mids and treble feel genuinely striking, aggressive and kinda rad to listen to. That's my only good point about the treble. It is simply a bit too overboosted and needs to be about 5dB lower for my tastes. Truthear and Crinacle seem to have agreed with that, as the Red has quite more tame treble, at least on squigs. One other thing to note is that the treble has no grain, which would've been a complete death knell to the stock treble performance otherwise.
Treble rating: 40/100

Imaging and staging

As with many budget sets, staging and imaging is not great. I feel that with these, the Tripowin Leás were slightly better, as the staging felt decent on those even at the $27-odd bucks they used to cost. Imaging is decent, but that is mostly due to the fact the stage is already set so small, that vague imaging would have been quite annoying.
Imaging and staging rating: 50/100
Instrument separation

Just like with the Leá, the instrument separation lacks a certain degree to sound good. Busy passages can get smoothed over, which is a little disappointing, but not to be unexpected in this price range.
Instrument separation rating: 45/100

Versus: Letshuoer DZ4 and Tripowin Leá

A little bit of a weird comparison, given that the latter is impossible to acquire and I have recently lost one of them! However, I have had a couple moments with the DZ4 of my brother's, and let me tell you, does that completely stomp on the Zero in most qualities. It is a polarizing set from what I have been led to believe, but the DZ4 has superior treble and mids, and considerably better technical performance as well, for about $25-30 more. It is definitely a set to consider if you're doing EQ often and wanna add just a tiny bit of a thump to your signature the DZ4 otherwise lacks. The comfort is also way, way better.

The Leá is a bit more interesting as it was nearly half the price during its release. I would say that tuning-wise, the Zero wins out on the bass, whereas the Leá wins out on mids and treble (where it is still slightly hot and might need a slight tempering-down). Technical performance is actually kind of neck-and-neck, though Leá has slightly better staging. It is also way easier to fit into your ears.

Overall rating and conclusion
It is difficult to say the Zero is worth getting in the current market. If you feel that Harman IE is a thing you wanna try out, I think this is one of the few sets in the range that does that reliably, given my reservations to this target. The bass is also quite nice, but there is one massive problem: The Red exists. At five bucks more, you're getting the same body, but with superior sound performance. I'd say at that point you might as well cop the Red. If you don't like this price range at all and maybe you're welcoming towards some EQ..the DZ4 is also here to stay for a while. I'm not disappointed with the listen at all, especially after EQ, which the Zero takes surprisingly well to. You can temper the treble by a large enough margin where the mids have a chance to breathe and perform with a decent amount of effort.
Overall rating: 60 (without EQ)
The keep rating is a new thing I am adding to my reviews. Simply put, on a scale from 1-10, how much is it worth it to keep this set? Under 6, I would not suggest to keep most sets unless they appeal to someone in a certain funky way.
Keep rating: 5.5/10
The Zeros still have potential, but the Reds just blow them out the water in many aspects nowadays.

In conclusion, Zero alright, Red better. Quite a competitive price range, this.
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Des99

New Head-Fier
Fun and affordable but niche
Pros: Fun tuning
Accessories
Bass
Energetic upper midrange
Treble
Affordable
Cons: Slightly shouty
Recessed lower midrange
Separation
Details
Bulky
Background
  • I’m super new to this hobby, previously/currently I own: KZ ZS10 Pro, Intime Sora Light 2019, Moondrop Quarks, Samsung Galaxy Buds 2, Truthear Hexa
  • Borrowed Truthear Zero from a friend for 1 week.
  • Listens to J-POP 99.99% of the time, but with a fair amount of different genres like rock, pop, classical, soundtracks, relaxed/slower-paced.
  • Have demo-ed a fair selection of IEMs
  • This is purely my impression of the Truthear Zero, please only take it with a grain of salt.



Source(s)
  • Truthear Shio
    • Adds some warmth and body to vocals, making them sound a little fuller.
    • Tames a bit of treble, making them sound less peaky.

Ear tips
  • SpinFit CP145
    • Adds some air and energy to the treble.
    • Opens up the soundstage slightly, making them a little wider.

Packaging
  • Comes with a decent amount of accessories
    • IEM.
    • Soft pouch.
    • Wide selection of eartips.
      • 3 pairs of narrow bore silicone tips (S, M, L)
      • 3 pairs of wide bore silicon tips (S, M, L)
      • 1 pair of memory foam tips
    • Cable is alright, tangles a bit sometimes.

Build Quality
  • Lightweight.
  • Bulky body.
  • Plasticky.
  • Pretty blue/purple-ish face plate.

Fit
  • Fairly large nozzle.
  • Fit is honestly not bad for me, fits quite well, but do note that the shell and nozzle are quite large.



Tonality
  • Tuned to Harman target
  • Fun tonality
    • Plenty of bass and aggressive upper midrange

Bass
  • Highlight of this IEM, very well done.
  • Well separated and controlled, props to the 1 DD that is dedicated to bass.
  • Has more mid bass slam compared to sub bass rumble.
  • A little one-dimensional, lacking in depth, but decent enough for $50.
  • However, the quantity is a bit too much for me.

Mids
  • Lower mids are recessed, this is fine if the track is not busy.
    • When tracks are really busy, some male vocals and certain instruments just get overshadowed and left in the background.
  • Upper mids are elevated, female vocals are really forward and energetic, to the point of slightly shouty to me.

Treble
  • Treble is alright, but not outstanding.
  • Not much sibilance or peakiness.
  • Details are a little underwhelming.



Technicalities

Detail Retrieval
  • Resolution is slightly underwhelming even in this price range.

Soundstage
  • Soundstage is slightly on the narrow side but it’s acceptable for the price


Imaging
  • Imaging and accuracy is surprisingly quite good.
  • Gaming
    • Apex Legends: Sound of footsteps and gunfire can be pinpointed in terms of direction, but have a little problem in pinpointing the exact location.
  • Overall, it should be good enough but I would not get this specifically for gaming.

Separation
  • Sounds congested, especially for busier tracks, sound just gets blended together, and not in a good way.

Verdict
  • If you want a really fun IEM that is tuned to Harman Target, you can consider demo-ing this before making a decision to purchase.

Thanks for reading!
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Cessnas172
Cessnas172
If you can find a 75ohm impedance adapter it changes the sound in a great way
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kmmbd

500+ Head-Fier
The Hype and the Aftermath
Pros: Build and accessory pack
– Comfortable fit
– Proper “subwoofer” driver configuration
– Sub-bass response is unique, with more focus on the density of notes than impact
– Good layering
Cons: Sub-bass has softened impact, might be an issue for those expecting robust bass
– Truthear Zero has thin, lifeless lower-midrange
– Scooped mid-bass region hurts impact of snare hits and thins out baritone vocals
– Dark, grainy treble
– Upper-mid shout may sound more pronounced due to lack of treble presence
– Middling technical performance
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INTRODUCTION

Reviewer collaborations are all the rage now. At the beginning, it was more of a novelty than a marketing shtick. At present, it’s rarer to not see a “tuned by X influencer” tag instead.

Truthear is a relatively new brand, but they chose to collaborate with Crinacle for their very first mainstream offering. Crin has been tuning IEMs for a while, and some of them have been quite popular e.g. the Blessing2 Dusk. Truthear Zero is the latest in the line of Crinacle-tuned IEMs and has a rather unique dual-driver setup where one driver acts as a true “woofer”.

Does the novel driver setup and Crinacle’s signature tuning manage to elevate the Zero above the rest of the competition? Or is another flavor-of-the-week that will soon have the spotlight stolen? Let’s find out.

Note: the ratings given will be subjective to the price tier. ShenzhenAudio was kind enough to send me the Truthear X Crinacle Zero for evaluation.
This review originally appeared on
Audioreviews.

Source used: Questyle CMA-400i
Price, while reviewed: $50.

PACKAGING AND ACCESSORIES

The packaging of the Truthear Zero has the trendy “waifu” cover art. In fact, the unit I received also came with an acrylic replica of the pictured character, named “Virgo”.

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Otaku-fanservice aside, we also get 6 pairs of silicone eartips (2 types), 1 pair of foam tips, and a nice carrying case. The stock cable is good for the price, though the memory hook is stiff. The carrying case looks and feels nice, but offers little protection.

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BUILD QUALITY

The entire shell is made out of resin with a glittery faceplate. I quite like the hue of blue on the Truthear Zero.

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There is one vent near the 2-pin connector, which are recessed thankfully. Crossover circuit can also be seen near the connectors. While the build is generally good, the shells are smudge prone and slippery. So keep a cleaning cloth handy.

COMFORT, ISOLATION, AND FIT

The Truthear Zero are very comfortable due to their pseudo-custom shape, and they offer good isolation.

SOURCE AND EARTIPS

The IEMs were tested with stock cable and eartips. Questyle CMA-400i was used as a source. The Truthear Zero is fairly easy to drive with any budget dongle.

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DRIVER SETUP

Truthear Zero uses two dynamic drivers in an asymmetric orientation: one near the nozzle (tweeter) and the woofer is closer to the center of the shell.

The larger 10mm “woofer” uses an LCP diaphragm with a PU suspension. The smaller “tweeter” clocks in at 7.8mm, and while the diaphragm and suspension material remains same, the voice coil is changed to a lighter CCAW material.

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The crossover circuit acts almost as a low-pass filter with the low-frequencies being solely handled by the woofer, and the tweeter having no response in sub-bass frequencies.

ONALITY AND TECHNICALITIES

Truthear Zero has a near-Harman 2019-esque frequency response. This essentially means a “clean boost” of sub-bass from 200Hz downwards, and an aggressive rise to the upper-mids from the low-mid region.

Also, this leads to a strange hollowness in the mid-bass region, something “mid-bass bad” crowd will probably try to pass off as a positive, but it is not often the case.

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Speaking of bass, the Truthear Zero has a detached sounding sub-bass akin to a 2.1 speaker setup. This is perhaps the intended tuning decision. Sub-bass has good density and dominates the scene in many electronic and live tracks. However, there is a softness to the sub-bass that makes it sound more polite than one would expect. Sub-bass rumble is not the strongest either.

Mid-bass is utterly devoid of body and slam. The bass is thus solely defined by the sub-bass emphasis near 50Hz. As a result of mid-bass hollowness and a near 12dB rise in the upper-mids, midrange is dominated by the upper-registers.

Snare hits lack body, baritone vocals sound thin, soaring male vocals get screechy and strained. Female vocals in bass-light tracks veer towards shoutiness.

Add to that the dark treble, which lacks sparkle and extension. As a result upper-mids gain further focus. Needless to say that this kind of tuning did not work well with my metal/rock focused library, and the occasional acoustic tracks and singer/songwriter pieces were marred by the shoutiness in the upper-mids.

Staging is average, imaging is mostly left and right. Not a technical tour-de-force in those regards. Layering is surprisingly good though, probably one of the strengths here. Overall resolution is middling.

Microdynamics are good, while macrodynamic punch is lacking due to the lack of mid-bass and dark mid and upper-treble.

SELECT COMPARISONS

vs Final E3000

Final E3000 has a more physical, impactful bass. They have superior male vocals in comparison but female vocals are noticeably more laid back than the Truthear Zero.

E3000 also has better treble definition and extension, wider staging and far superior imaging. The areas where the Truthear Zero trounce the E3000 are: build, vocal clarity, and far simpler amplification needs. E3000 need a good source to shine, which adds to the cost.

vs BLON BL-05S

Compared to the Truthear Zero, BL-05S lack bass impact and rumble. Bass is in fact the weakest aspect of the BL-05S.

Things get very different as we move upward the frequencies, with the BL-05S being far more resolving in treble and mids. Imaging and separation are superior on the BLON as well.

One caveat of the BL-05S is that they need cable and tip change, whereas Truthear Zero is good to go in stock form. If you need a more technically accomplished pair under $50, BL-05S will be a better pick.

CONCLUDING REMARKS

Truthear Zero aces the frequency response graph game. If you primarily base your purchase decisions on a pair of IEMs hitting a specific target, the Truthear Zero will be right up your alley. Also, those preferring Harman-ish tuning should be happy with the tuning here.

Unfortunately for me, most rock, metal, and pop songs sound odd and lack the body and density I expect, especially if the vocalist is male. The Zero fare better in instrumentals and female vocal based tracks, but there are better options in this price range if those are your priorities.

In the end, the driver configuration is the most interesting aspect of the Truthear Zero, and there is nothing wrong with that. They just do not stand out enough in terms of technicalities, and the shouty vocals followed by dark treble doesn’t make things better.

I hope Truthear reigns down the upper-mids and focuses on refining the treble on the next release, and if a dose of mid-bass is added with that – color me interested.
Lien028
Lien028
I purchased these recently, and these IEMs give me a conflicting feeling. The sound signature (i.e. Harman 2019) is one that I prefer and I'm amazed at the sound quality I get for just 50$. Now I'm interested in the Truthear Nova which (allegedly) has the same tuning as the Moondrop Variations, an IEM that's 5x its price.

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