Truthear Zero: Blue 2 VS DUNU x KOTO ITO

IEM Comparison: Expert & Community Scores Side-by-Side

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Truthear Zero: Blue 2 and DUNU x KOTO ITO use 2DD and 2DD+2BA driver setups respectively. Truthear Zero: Blue 2 costs $65 while DUNU x KOTO ITO costs $199. DUNU x KOTO ITO is $134 more expensive. DUNU x KOTO ITO holds a decisive 1.9-point edge in reviewer scores (5.3 vs 7.2). Truthear Zero: Blue 2 has slightly better mids with a 0.4-point edge, DUNU x KOTO ITO has significantly better treble with a 2.2-point edge, DUNU x KOTO ITO has significantly better dynamics with a 2.8-point edge and DUNU x KOTO ITO has significantly better soundstage with a 1.3-point edge.

Insights

Metric Truthear Zero: Blue 2 DUNU x KOTO ITO
Bass 8 8.1
Mids 6.5 6.1
Treble 4 6.2
Details 5.3 7.2
Soundstage 6 7.3
Imaging 5.3 7.4
Dynamics 5 7.8
Tonality 5.7 7.1
Technicalities 5.5 6.2
Take these comparisons with a grain of salt—we don't have enough DUNU x KOTO ITO reviews saved yet to provide an unbiased result.

Truthear Zero: Blue 2 Aggregated Review Score

Average Reviewer Scores

Audio Amigo
Jays Audio Gizaudio Axel Jaytiss Fresh Reviews
Tim Tuned Super* Review
Head-Fi.org

Average Reviewer Score:

5.3

Mixed to Negative

DUNU x KOTO ITO Aggregated Review Score

Average Reviewer Scores

Z-Reviews
Jaytiss Head-Fi.org Web Search

Average Reviewer Score:

7.2

Generally Favorable

Reviews Comparison

Truthear Zero: Blue 2 reviewed by Jaytiss

Jaytiss 5.3 Reviewer Score
C- Tuning
E+ Tech
BASS With the adapter this goes up a bit, but it is difficult to recomend.

Jaytiss original ranking

Jaytiss Youtube Channel
Mids: C+ Treble: E+ Dynamics: C+ Soundstage: B
YouTube video thumbnail

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DUNU x KOTO ITO reviewed by Jaytiss

2025-09-11
Jaytiss 7.4 Reviewer Score
B Tuning
C+ Tech
YouTube video thumbnail
It's a fun tuning that I think people will like.
Youtube Video Summary

Build & accessories land in a solid spot for the price: comfortable shells with secure nozzles, clear L/R marks, and a supple modular cable that swaps between 4.4mm and 3.5mm (no USB-C in-box). The hard case is nicely made and pocketable, and the whole package feels durable if not premium. Nothing glaring in QC—just a clean, practical presentation.

Sonically, this is a bold V-shape—huge sub-bass punch with elevated upper mids to keep things lively. The bass can turn boomy/pillowy on some tracks, and a scoop around 300–800 Hz can leave female vocals a touch recessed; treble is clean and controlled, a little dark up top with limited sparkle. Technicalities are decent rather than class-leading—separation and air trail sets like Punch Audio Martillo or Crescent, while tuning kinships show up against DUNU Glacier and even Grand Maestro-style balances. Compared to value darlings (e.g., Truth Ear Pure, Jazzer Defiant), ITO feels more audiophile-flavored fun than an all-rounder.

In DUNU’s lineup it reads as a unique basshead option: very engaging slam, thick note weight, and non-fatiguing treble, but only average mids/technicalities. Think hip-hop/EDM-friendly impact over neutral precision. Verdict: around 3–3.5 stars—competitive at $200 for those chasing thump and excitement; listeners wanting neutrality, vocal presence, or extra air may prefer other picks or a “tactful V” with less bass and less upper-mid bite.

Mids: C+ Treble: C+ Dynamics: A+ Soundstage: A

Jaytiss original ranking

Jaytiss Youtube Channel

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Truthear Zero: Blue 2 reviewed by Head-Fi.org

Head-Fi.org 7 * score rescaled + normalized
8 community members have rated the Truthear Zero: Blue 2 at an average of 3.8/5 on Head-Fi. Overall sentiment: Strongly Favorable.

URL to full Review

Head-Fi.org original ranking

DUNU x KOTO ITO reviewed by Head-Fi.org

Head-Fi.org 7 * score rescaled + normalized
4 community members have rated the Dunu x Koto ITO at an average of 3.8/5 on Head-Fi. Overall sentiment: Strongly Favorable.

URL to full Review

Head-Fi.org original ranking

Truthear Zero: Blue 2 (more reviews)

Truthear Zero: Blue 2 reviewed by Tim Tuned

Tim Tuned 6 Reviewer Score
B Tuning
A+ Tech
Pros: Slightly more balanced and pleasing Harman tuned. Cons: Treble with silicone tips is piercing.

Tim Tuned original ranking

Tim Tuned Youtube Channel
Bass: A+ Mids: A+ Treble: B
YouTube video thumbnail

Truthear Zero: Blue 2 reviewed by Super* Review

Super* Review 6* * score rescaled + normalized
Harman target tuned. Sounds pretty V and contrasty. Not a whole lot of mids. Fairly tasteful. Good sense of separation. Sterile/Lifeless mids and annoying treble. Needs foam eartips.

Super* Review original ranking

Super* Review Youtube Channel
YouTube video thumbnail

Truthear Zero: Blue 2 reviewed by Jays Audio

Jays Audio 5.5 Reviewer Score
B+ Tuning
B+ Tech
Fun sub-woofer sound in the low-end, nice bouncy textue, but uppermids/treble can be too bright, especially with 15K treble peak. Basically a more v-shaped version of the OG TE Zeros. Vocals can be a bit shouty and thin.

Jays Audio original ranking

Jays Audio Youtube Channel

Truthear Zero: Blue 2 reviewed by Gizaudio Axel

Gizaudio Axel 5.5 Reviewer Score
B Tuning
B- Tech
Harman tuning with clean, punchy bass and great resolution. Bright treble.

Gizaudio Axel original ranking

Gizaudio Axel Youtube Channel

Truthear Zero: Blue 2 reviewed by Fresh Reviews

Fresh Reviews 5* * The score of this reviewer influences only the Gaming Score
check links for more info:

Fresh Reviews original ranking

Fresh Reviews Youtube Channel
YouTube video thumbnail

Truthear Zero: Blue 2 reviewed by Audio Amigo

Audio Amigo 2 * score rescaled + normalized
Seems to showcase my least favorite parts of the Harman Target. Lower mids are thin and anemic, treble is overblown and fatiguing. Foam tips help with treble, bass adapter helps with lower mids. Price increase from OG Zero puts it closer to more balanced competition. Just not for me.

Audio Amigo original ranking

Audio Amigo Youtube Channel
YouTube video thumbnail

DUNU x KOTO ITO (more reviews)

DUNU x KOTO ITO reviewed by Z-Reviews

2025-09-07
Z-Reviews 6.8 * score rescaled + normalized
YouTube video thumbnail
Youtube Video Summary

Dunu’s collab with Japanese creator Kaji Kaji lands as the ITO, tuned nothing like the stereotype of “treble ’til you die.” The presentation leans smooth, warm, and open, with a notably wide soundstage that flatters jazz and intimate acoustic sets—think late-night, bourbon-and-smoky-room mood without the glare. It’s built for relaxed musicality rather than forensic detail extraction.

Low end carries a thick, satisfying sub-bass that stays tasteful—present when the track calls for it, not a constant spotlight. The ITO plays “fun first”: big space, plush tone, and enough detail to keep things engaging, landing beside a “T Pro”-type set but with the clinical edges dialed back to emphasize bass and stage. In short, a “perfect fun IEM” vibe that prefers groove and atmosphere over microscope listening.

Ergonomically the shells are a bit thick, but build and accessories impress: a quality Dunu cable with interchangeable plugs, a case, and a spread of tips (including Dunu SS). The hybrid 2DD+2BA setup (ultra-low DD + low/mid DD, mid BA, ultra-high BA) at around 37 Ω runs well from modest sources and scales nicely; pricing circles the $200 mark, making it an easy recommendation for listeners who want warm, expansive, and genuinely musical tuning without chasing every last micro-detail.

Z-Reviews original ranking

Z-Reviews Youtube Channel

DUNU x KOTO ITO reviewed by Web Search

2025-09-07
uses AI-Search to turn user, reddit and head-fi reviews into clear, concise summaries.
Web Search 7.6 Reviewer Score
A Tuning
A- Tech

DUNU x KOTO ITO is a $199.99 hybrid IEM built with Japanese reviewer Kaji Kaji (“Koto”). It uses a 2DD+2BA array (10 mm bio-diaphragm DD + 8 mm LCP DD, plus two treble BAs), comes with DUNU’s Q-Lock quick-swap plugs, and lists 105 dB sensitivity at 37 Ω with shells at ~6.5 g each.

Tonally, ITO aims for a U-shaped, bass-tilted balance: sub/mid-bass punch is elevated, mids sit slightly back but avoid haze, and treble is smooth with workable extension rather than bite. Early community impressions frame it as energetic and a touch V-leaning versus DUNU’s more neutral sets, which tracks with the collab’s “full-bodied” intent.

Technicalities are competent for the class: dynamics and imaging keep up with busy mixes, while soundstage and microdetail are closer to average among sub-$200 hybrids; driveability is friendly given 105 dB/37 Ω. As a package—tuning, accessories, and fit—it offers good value for listeners wanting engaging bass without sharp treble, though those chasing expansive stage or strict neutrality may prefer other options.

Bass: A+ Mids: A- Treble: A- Dynamics: A Soundstage: A- Details: A- Imaging: A-

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Truthear Zero: Blue 2 User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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DUNU x KOTO ITO User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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Truthear Zero: Blue 2 Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

5.1

Gaming Grade

C+

DUNU x KOTO ITO Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

6.4

Gaming Grade

B

Truthear Zero: Blue 2 Scorings

Average Technical & Tuning Grades

Average Tunign Grade

B-
  • It sounds pleasant overall, with some uneven spots that hint at room for refinement. Vocals remain pleasant despite the imperfections.

Average Technical Grade

B-
  • An honest, middle-of-the-road performance preserves structure without chasing micro-detail. It's respectable for everyday listening sessions.
Bass A+
You hear powerful yet disciplined low-end slam that extends effortlessly. It marries sub-bass depth with great texture.
Mids B+
Midrange presence is good, delivering clear vocals and solid texture. Voices come through with pleasing clarity.
Treble C-
Highs are present enough yet carry a bit of grain and splash. Busy mixes can still feel a bit splashy.
Dynamics C+
Expect solid impact overall, even if finer gradations feel a touch smoothed. Micro-details could still be sharper.
Soundstage B
Lateral spread stretches comfortably while front/back cues start to feel convincing. You can trace front-to-back movement.
Gaming C+
Fundamental left/right positioning with limited depth perception. Works for non-competitive gaming but lacks precision.

DUNU x KOTO ITO Scorings

Average Technical & Tuning Grades

Average Tunign Grade

A-
  • The tonal character feels settled and versatile, with just a few gentle bumps. You can listen for hours without fatigue.

Average Technical Grade

B
  • An honest, middle-of-the-road performance preserves structure without chasing micro-detail. It's respectable for everyday listening sessions.
Bass A+
It delivers flagship-worthy bass, rich in both rumble and nuance. Reference tracks showcase its grip.
Mids B
The mids are articulate and well-balanced, lending body to instruments. Instrument layering remains stable.
Treble B
Treble is articulate and clean, adding excitement without harshness. It adds sparkle without harshness.
Dynamics A
The system snaps into action with precision, highlighting every swell. Recordings feel energetic and alive.
Soundstage A-
The stage stretches in every direction, carving out clear three-dimensional pockets for each player. Placement accuracy impresses from the start.
Details A-
Textural subtleties glow, giving each recording a beautifully illuminated character. It exposes mix decisions with precision.
Imaging A-
Depth mapping feels natural and accurate, supporting convincing immersion. Depth mapping feels precise and natural.
Gaming B
Decent spatial awareness for fundamental positioning. Creates satisfying atmosphere in story-driven games while handling basic directional cues.

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