Stored Category Comparison

Letshuoer S15 vs Noble Audio Onyx

This page compares two published iems profiles using stored summaries, source-attributed scoring, and a single lines-only radar for fast visual difference checks.

Back to Letshuoer S15Open Noble Audio Onyx

Sound Profile Radar

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Letshuoer S15
Noble Audio Onyx

Category Scores

Stored score comparison

Every score is pulled from the stored product intelligence snapshot for this category pair.

AxisS15OnyxDelta
Bass
8
8.8
+0.8
Mids
8.1
8.7
+0.6
Treble
7.2
8.6
+1.4
Technicalities
7.5
9
+1.5
Soundstage
7.5
8.9
+1.4
Value
7.2
7.3
+0.1

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Letshuoer S15 can only be compared against published iems profiles.

Quick Read

Letshuoer S15

The S15 is Letshuoer's 3rd-generation 14.8mm planar with a passive 6mm R-Sonic filter, and approved coverage agrees it deliberately walks away from the bright, energetic S12 formula. The consensus is a rich, smooth, warm-leaning planar that prioritizes body and listenability over raw detail: bass has real weight for a planar, mids are full and relaxed, and treble stays polite. Reviewers praise it as a fatigue-free long-session set, while the recurring criticism is that resolution and clarity are only moderate for $329 and listeners expecting an S12 successor's energy find it subdued.

Noble Audio Onyx

Across Headfonia and Bloom’s approved coverage, the Onyx comes through as a premium, neutral-warm quadbrid that majors on polish, immersion, and textured low-end power rather than exaggerated V-shape theatrics. The bass is repeatedly described as strong and controlled, the mids clear and full, and the stage spacious enough to give flagship material a convincing sense of scale. The Onyx is also framed as an endgame-style listen with upscale build and presentation. Its compromises are predictable for the class: price is steep, and its character leans more toward refined fullness and immersive richness than aggressive excitement.

Letshuoer • IEMs

Letshuoer S15

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The S15 is Letshuoer's 3rd-generation 14.8mm planar with a passive 6mm R-Sonic filter, and approved coverage agrees it deliberately walks away from the bright, energetic S12 formula. The consensus is a rich, smooth, warm-leaning planar that prioritizes body and listenability over raw detail: bass has real weight for a planar, mids are full and relaxed, and treble stays polite. Reviewers praise it as a fatigue-free long-session set, while the recurring criticism is that resolution and clarity are only moderate for $329 and listeners expecting an S12 successor's energy find it subdued.

Strengths

  • Rich, smooth, non-fatiguing tuning that is rare among planar IEMs
  • Bass carries genuine weight and warmth without losing planar control
  • Comfortable long-session listen with a full-bodied midrange

Weaknesses

  • Detail and clarity are moderate for the $329 asking price
  • Polite treble and relaxed presentation can read as dull after the S12
  • Not the pick for listeners chasing maximum technical performance

Noble Audio • IEMs

Noble Audio Onyx

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Across Headfonia and Bloom’s approved coverage, the Onyx comes through as a premium, neutral-warm quadbrid that majors on polish, immersion, and textured low-end power rather than exaggerated V-shape theatrics. The bass is repeatedly described as strong and controlled, the mids clear and full, and the stage spacious enough to give flagship material a convincing sense of scale. The Onyx is also framed as an endgame-style listen with upscale build and presentation. Its compromises are predictable for the class: price is steep, and its character leans more toward refined fullness and immersive richness than aggressive excitement.

Strengths

  • Controlled, textured low end with real flagship scale
  • Clear, full mids with strong spatial placement
  • Premium build, cable, and overall presentation

Weaknesses

  • Very expensive even in the flagship segment
  • Less overtly thrilling than more aggressive V-shaped competitors
  • Best value depends on already shopping at the endgame tier