Truthear Zero Review
INTRODUCTION AND DISCLAIMER:
The Truthear Zero is an in-ear monitor (IEM) which uses a dual dynamic driver setup. A 10mm driver handles low frequencies while a 7.8mm driver handles the remainder of the frequency response. The Zero is a collaboration project between Truthear and Crinacle. The Zero retails for $49.99 at ShenzhenAudio, which sent me a unit in exchange for my impressions.
SOURCES:
I have used the Truthear Zero with the following sources:
- Qudelix 5K
- Hidizs S9
- Reiyin DA-PLUS
- Xumee Dongle
- Apple Dongle
- E1DA 9038D
PACKAGING AND ACCESSORIES:
The Truthear Zero comes in a medium-sized rectangular black cardboard box with a white slipcover. The front of the slipcover is illustrated with an anime waifu. The Zero’s technical specifications are listed on the back of the slipcover in both English and Chinese. A frequency response graph is also featured.
The Zero includes six pairs of silicone eartips (2xS, 2xM, 2xL), a single pair of foam eartips, a faux leather carry pouch with snap closures, and a detachable .78mm 2-pin cable. In terms of documentation, the Zero includes a warranty card, an owner’s manual, and a cryptic “Install Guide” of unclear purpose.
My review unit also came with a two-dimensional acrylic waifu figurine named Virgo, who can be added to your Zero purchase for an additional $5 at the time of writing.
BUILD QUALITY AND DESIGN:
The Truthear Zero has dark translucent acrylic shells and glittery blue faceplates. The faceplates have a triangular cross-section and feature a detailed feather-like relief pattern beneath a glossy top layer. The gap between the faceplate and shell is visibly seamless, and the overall build quality of the shell is impressive for the price point. There is a circular vent adjacent to the 2-pin connector, which is slightly recessed. “L” and “R” indicators are printed in gold on the other side of this vent. with the shell. The nozzles are acrylic with metal mesh nozzle filters. The nozzles are thick and have substantial rims to secure eartips.
The cable uses black sheathed wires wrapped in a quad-braid below the Y-split and coiled into double-helix patterns above the Y-split. The cable has pre-formed heat-shrink earguides and a metal chin adjustment choker. The cable is quite microphonic if the chin adjustment choker is not used. The L-shaped 3.5mm jack uses rubber hardware. There is strain relief above the 3.5mm jack but none at the Y-split.
In contrast to the shell, I am not as impressed by the quality of this cable as some other reviewers, who have compared it favorably to the stock cables included with IEMs from high-end Western IEM manufacturers. I think the comparison is spot-on, but I also think that the stock cables I’ve seen from 64 Audio and FiR Audio are embarrassing given the price points of the IEMs they ship with.
COMFORT, FIT, AND ISOLATION:
The Truthear Zero is intended to be worn cable-up. The earpieces have a fairly deep insertion depth. While I can tolerate the Zero for extended periods, the large size of the nozzles combined with a less than ideal nozzle angle for my ears keeps me from calling the Zero comfortable. Secureness of fit is above average, while isolation is average. There is very mild driver flex with some silicone eartips.
MEASUREMENTS:
My measurements of the Truthear Zero can be found on my expanding squig.link database:
Truthear Zero — Squiglink by Bedrock Reviews
SOUND:
The Truthear Zero hews closely to the Harman In-Ear 2019 (Harman IE)target.
There is a substantial elevation in the sub-bass which is contained entirely below 200 Hz. Despite a bit of measured sub-bass roll-off relative to the overall bump, I find the Zero’s sub-bass extension to be excellent. There is a palpable, subwoofer-like impact to the sub-bass region. There is plenty of both rumble and slam, and electronic dance music is a joy to listen to on the Zero. Bass dynamics, texture, and detail retrieval are excellent for a $50 IEM.
The Zero has a cool and recessed lower midrange followed by a broadly elevated upper midrange. The pinna gain region is centered between 2 and 3 kHz and is closer to 3 Khz than 2 Khz. As a result of its near-textbook adherence to the Harman IE target, vocal delivery is emphasized to the point of overshadowing midrange instrumentation. Vocal intelligibility is excellent for both male and female vocals. However, harsh, aggressive male vocals are a little thin and lack grit and power. Female vocals are noticeably more prominent than male vocals but do not exhibit the oversaturated huskiness that results from grossly overemphasizing female vocals. Female vocals do flirt with sibilance at times. The presence region is well-controlled relative to the overall upper midrange contour. However, I think the level of presence in the Harman IE target is excessive, especially given the fairly recessed lower midrange. There is not enough body and slightly too much top-end energy to distorted electric guitars. There is also a bit of compression to analog percussion, which results in a slightly plastic timbre.
The Zero has neither too much lower treble nor too little upper treble extension, but I do find the measured gap in the Zero’s mid-treble to be audible. The sparkle usually provided by an emphasis in the 10–12 kHz range is missing. As a result, the overall treble presentation is a little dull for my taste. The Zero does avoid any sense of metallic timbre or excessive sizzle to cymbal hits. Treble transient delivery is very crisp, and overall detail retrieval is very good. The soundstage is on the wider side for an IEM not using a multi-balanced armature arrangement, but instrument separation is fairly average, as is imaging.
AMPLIFICATION REQUIREMENTS AND SOURCE PAIRING:
The Truthear Zero is surprisingly difficult to drive. Reaching a useable volume on Android using the Apple Dongle with Spotify volume normalization set to “Normal” required a system volume setting of at least 23/25. I recommend grabbing a more powerful source for the Zero if you are using an Android device. I did not notice hiss with any of my sources.
CLOSING WORDS:
The Truthear Zero has been a pleasure to listen to, but frustrating to review. The level of scrutiny I have aimed at it in this review is usually reserved for much more expensive IEMs. It is an unqualified recommendation at $50, but it easily could have been even more groundbreaking with some minor tweaks. I sincerely hope that Truthear can realize the Zero’s true potential with future releases.
The Truthear Zero can be purchased below:
Truthear ZERO Earphone Dual Dynamic Drivers PU + LCP Composite Diaphr (shenzhenaudio.com)