64 Audio U12T VS Unique Melody MEST mkII
IEM Comparison: Expert & Community Scores Side-by-Side
64 Audio U12T and Unique Melody MEST mkII use 12BA and 1DD+4BA+2EST+1BC driver setups respectively. 64 Audio U12T costs $1,999 while Unique Melody MEST mkII costs $1,500. 64 Audio U12T is $499 more expensive. 64 Audio U12T holds a slight 0.2-point edge in reviewer scores (8.3 vs 8.1). User ratings place 64 Audio U12T at 8.2 and Unique Melody MEST mkII at 7.5. 64 Audio U12T has slightly better bass with a 0.3-point edge, 64 Audio U12T has better mids with a 0.7-point edge, 64 Audio U12T has better treble with a 0.6-point edge, 64 Audio U12T has better dynamics with a 0.7-point edge, 64 Audio U12T has better details with a 0.7-point edge and 64 Audio U12T has significantly better imaging with a 1.6-point edge.
Insights
| Metric | 64 Audio U12T | Unique Melody MEST mkII |
|---|---|---|
| Bass | 8.5 | 8.1 |
| Mids | 8.2 | 7.5 |
| Treble | 7.7 | 7.1 |
| Details | 8.9 | 8.2 |
| Soundstage | 8.2 | 8 |
| Imaging | 9.1 | 7.5 |
| Dynamics | 7.7 | 7 |
| Tonality | 8.1 | 7.5 |
| Technicalities | 8.7 | 8 |
64 Audio U12T Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.3Very Positive
Unique Melody MEST mkII Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.1Very Positive
Reviews Comparison
64 Audio U12T reviewed by Super* Review
10*
* score rescaled + normalized
Youtube Video Summary
The 64 Audio U12t lands exactly where its reputation suggests: a warm, laid-back, yet highly detailed all-rounder that stays engaging without ever turning fatiguing. With the apex M15 module, bass shifts toward a tasteful sub-bass lift that adds punch and body while keeping the midrange clean; vocals sit a touch relaxed, and the treble reaches high with smooth extension and air. Despite being an all-BA set, the low end carries surprising weight and macro-dynamics, and the overall presentation feels effortless and cohesive—“does-it-all” tuning done right.
Trade-offs are minor: timbre can sound slightly artificial at times, and dropping to the M10 module trims bass but also some excitement. Build is comfortable and compact, though the stock cable is annoyingly wiry and memory-prone. Against its stablemates, U12t stands as the benchmark: cleaner and less fatiguing than U18t, more versatile than the warmer Nio (with M15), and less head-stage wow than Trio but more universally balanced. End result: a confident 5/5 for a high-price IEM that actually feels worth chasing if this signature hits the brief.
Super* Review original ranking
Super* Review Youtube ChannelBuy 64 Audio U12T on audio46
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Unique Melody MEST mkII reviewed by Super* Review
10*
* score rescaled + normalized
Buy Unique Melody MEST mkII on Linsoul
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64 Audio U12T reviewed by Nymz
9.1
Reviewer Score
Unique Melody MEST mkII reviewed by Nymz
7.6
Reviewer Score
64 Audio U12T reviewed by Audionotions
9
Reviewer Score
Unique Melody MEST mkII reviewed by Audionotions
8.5
Reviewer Score
64 Audio U12T reviewed by Precogvision
8.6
Reviewer Score
Youtube Video Summary
Presentation falls short of flagship expectations—especially the stock cable, which feels flimsy and uninspiring—but the tuning is where the 64 Audio U12t earns its reputation. With a gently U-shaped response and swappable apex modules altering bass quantity (M10 leaner; M15/M20 adding a deeper, sub-bass-tilted shelf), the low end carries uncommon texture and decay for an all-BA setup while preserving BA speed and control. The sub-bass shelf levels off around 200Hz, avoiding midrange bleed and keeping the overall tonality clean and balanced.
The mids are slightly scooped yet inoffensive, with ear-gain centering near 2kHz and a tasteful dip through 2–5kHz that preserves depth without hollowing out vocals. Treble is distinctive thanks to the tia super tweeter mounted at the nozzle: a mid-treble dip followed by pronounced peaks around 15–17kHz creates a sense of airy “pseudo-treble” that some listeners (especially younger ears) perceive as bright, while others may find it dark if those upper harmonics aren’t audible. Tip choice matters—Spinfits can emphasize air, while Final E can tame the top end—making the signature unusually tunable to preference.
On the technical front, the U12t is highly resolving, pulling micro-details forward with ease, yet its transient attack has a subtle softness that gives an “analog” character rather than razor-edged sharpness. Where it truly distinguishes itself is macrodynamics—quiet-to-loud swings feel visceral and engaging, a rarity among BA designs and rivaled only by a select few dynamic-driver flagships. Summed up, it’s the “90-in-every-subject” kind of performer: maybe not the single best at any one metric, but making the fewest compromises across the board. For anyone seeking a well-rounded flagship that handles almost anything with poise, the U12t remains a top recommendation.
Precogvision Youtube Channel
Unique Melody MEST mkII reviewed by Precogvision
7.1
Reviewer Score
Precogvision Youtube Channel
64 Audio U12T reviewed by Jays Audio
8.5
Reviewer Score
Youtube Video Summary
Presented as a former favorite turned cautionary tale, the 64 Audio U12t shows a neutral-warm bass with good texture, speed, and separation, though the mid-bass can feel unnecessary for a non–bass-head tuning. Trouble starts at the 3 kHz scoop, where vocals lose presence and clarity; attempts to restore bite via added treble create sharpness instead of openness, with emphasized peaks around 13 kHz and 17 kHz. This combo makes volume scaling tricky—either accept recessed vocals or endure fatiguing highs—though the treble is otherwise solid from 6–10 kHz. Technical chops are undeniably strong: detail retrieval, instrument layering, and imaging are top-tier, with quick attacks and clean separation across the stage. Still, the staging feels wide yet flat, as the recessed mids reduce depth and contrast, and dynamic tracks (K-pop/J-pop/J-rock) expose the unevenness, prompting constant volume tweaks; slower, softer material fares better. Given the vocal recession and treble fatigue, the value proposition is questioned for a $2,000 set—alternatives like the Variations and EGL7m offer more open, extended vocals with smoother treble, while RS5 and Heyday provide extra warmth without the same pitfalls.
Jays Audio Youtube Channel
Unique Melody MEST mkII reviewed by Jays Audio
8.5
Reviewer Score
Youtube Video Summary
UM MEST MKII delivers a distinctly sub-bass-oriented low end with excellent speed, separation, and texture. Mid-bass is punchy but avoids bloat, keeping the presentation clean and avoiding bleed. The unconventional decision to keep the 1–5 kHz region flatter and push energy into 5–15 kHz pays off: vocals stay open, natural, and clear—reminiscent of Variations but with a cleaner, leaner midrange and a more refined overall balance.
The stage is impressively wide and expansive—on the level of sets like Z1R and U12t—yet with notably better vocals. Treble is well-extended, slightly aggressive in a good way, and highly resolving, rendering micro-details with ease without tipping into artificial sharpness. As a result, technical ability—clarity, separation, and imaging—is top tier, making dense tracks feel effortless while still bringing energy and excitement to hip-hop and retaining emotional nuance for ballads.
In sum, MEST MKII stands out as a true all-rounder “endgame” that justifies its $1,500 tag more convincingly than most. Notable comparisons place it a step above sets like Meteor, Mahina, and Variations for the mix of enjoyment and technicalities, though value hunters may note EJ07M achieves roughly “90%” of the experience at a fraction of the price. The only caveat: treble can become too lively at very loud volumes (80 dB+), but at normal listening levels, MEST MKII remains a compelling benchmark for its category.
Jays Audio Youtube Channel
64 Audio U12T reviewed by Shuwa-T
8.5
Reviewer Score
Unique Melody MEST mkII reviewed by Shuwa-T
8
Reviewer Score
64 Audio U12T reviewed by Yifang
8
Reviewer Score
Youtube Video Summary
Unique Melody MEST MKII brings a distinctive recipe: a DD + 4BA + 2EST array augmented by a full-range bone-conduction driver, translating to a relaxed yet vividly holographic presentation. Bass quantity sits in the pocket—neither shy nor boomy—while the sub-bass extension digs deep and rumbles on cue, sketching out stage width and depth with authority. Mid-bass hits cleanly but avoids brute-force slam, keeping space clear for detail. Mids read a touch lean/diffused: tonally correct and easygoing, gorgeous on plucked strings, a bit light in note weight for violins and cellos. Treble is sparkly without sibilance at sane volumes; push volume for bigger bass hits and the upper range can tip into fatigue. Don’t over-trust FR graphs here—the BC driver adds presence that won’t show on measurements.
Technical chops are firmly high-end: resolution and separation impress, EST speed makes cymbals and chimes glide, and dynamics pop when sub-bass swells. The staging is the showstopper—layered, airy, and convincingly 3D (hell yeah). Versus peers, MEST MKII trades some midrange weight/tonality for superior sparkle and more satisfying bass texture; sets like V16 Divinity or Elysian Diva may win for mids, but MEST counters with atmosphere and bite up top. With the current price drop around the ~$1k mark, it becomes an easy recommendation for those seeking immersive imaging and sub-bass architecture—just ditch the atrocious stock cable ergonomics and enjoy the ride.
Yifang Youtube Channel
Unique Melody MEST mkII reviewed by Yifang
8.5
Reviewer Score
64 Audio U12T reviewed by Tim Tuned
7.5
Reviewer Score
Tim Tuned Youtube Channel
Unique Melody MEST mkII reviewed by Tim Tuned
7
Reviewer Score
Tim Tuned Youtube Channel
64 Audio U12T reviewed by Crin
7.5
Reviewer Score
Unique Melody MEST mkII reviewed by Crin
6.5
Reviewer Score
64 Audio U12T reviewed by Head-Fi.org
5.5
* score rescaled + normalized
Unique Melody MEST mkII reviewed by Head-Fi.org
8.9
* score rescaled + normalized
64 Audio U12T (more reviews)
64 Audio U12T reviewed by Kois Archive
8.2
Reviewer Score
Kois Archive Youtube Channel
64 Audio U12T reviewed by Smirk Audio
7.9
Reviewer Score
64 Audio U12T reviewed by Jaytiss
7.8
Reviewer Score
Jaytiss Youtube Channel
64 Audio U12T reviewed by Web Search
9.4
Reviewer Score
The 64 Audio U12t is a mature flagship-class UIEM built around twelve balanced armatures per side and the company’s tia (open-BA) and apex pressure-relief tech; it lists at $1,999. Module options (mX/m15/m20) vary isolation from roughly −10 to −20 dB, giving modest control over perceived balance without changing the core tuning. The driver split—1 tia high, 1 high-mid, 6 mid, 4 low—aims for coherence via a 4-way crossover in a compact, aluminum shell.
Tonally the U12t trends neutral with a sub-bass lift, yielding clean mids and controlled, generally safe treble; frequency-response databases show the gentle low-end emphasis with even mids. Swapping apex modules can nudge the balance (e.g., M20 a bit more bass, M15 a touch airier) without altering the U12t’s fundamental character. Technical performance remains the calling card: resolution, imaging, layering, and BA-bass quality are repeatedly praised at the top of the class.
Trade-offs are mostly about preference and price: treble can read polite with minor quirks depending on chain and tips, and midrange body is slightly lean versus warmer sets. Given the premium MSRP, overall value hinges on prioritizing top-tier technicalities and long-session comfort via apex.
Unique Melody MEST mkII (more reviews)
Unique Melody MEST mkII reviewed by
Fresh Reviews
5.5*
* The score of this reviewer influences only the Gaming
Score
64 Audio U12T Details
Driver Configuration: 12BA
Tuning Type: Neutral with Bass Boost
Brand: 64 Audio Top 64 Audio IEMs
Price (Msrp): $1,999
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Unique Melody MEST mkII Details
Driver Configuration: 1DD+4BA+2EST+1BC
Tuning Type: Warm, V-Shaped
Brand: Unique Melody Top Unique Melody IEMs
Price (Msrp): $1,500
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64 Audio U12T User Review Score
Average User Scores
Average User Score:
Based on 1 user reviews
8.2Very Positive
Unique Melody MEST mkII User Review Score
Average User Scores
Average User Score:
Based on 1 user reviews
7.5Strongly Favorable
64 Audio U12T Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7Gaming Grade
A-Unique Melody MEST mkII Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.8Gaming Grade
B+64 Audio U12T Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A+- The tonal balance is polished and expressive, highlighting emotion without sacrificing accuracy. It keeps emotional weight without sacrificing accuracy.
Average Technical Grade
S-- Expect top-tier articulation, where staging, imaging, and transient control feel effortless. It keeps instruments locked in place effortlessly.
Unique Melody MEST mkII Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A- Expect an inviting tonal blend that adapts well to genres while staying largely composed. It strikes a nice blend of warmth and clarity.
Average Technical Grade
A+- Overall technical control is strong, presenting instruments with clarity and sensible staging. Textures are portrayed with satisfying clarity.
64 Audio U12T User Reviews
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Pros
Openness and imaging. Dynamic. Spacious bass. Vocals with breath and feel on live.Cons
Vocals slightly sibilant.Unique Melody MEST mkII User Reviews
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