Stored Category Comparison

7Hz Timeless II vs Letshuoer S15

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 7Hz Timeless IIOpen Letshuoer S15

Sound Profile Radar

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7Hz Timeless II
Letshuoer S15

Category Scores

Stored score comparison

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

AxisTimeless IIS15Delta
Bass
8.1
8
-0.1
Mids
7.6
8.1
+0.5
Treble
7.9
7.2
-0.7
Technicalities
8.4
7.5
-0.9
Soundstage
8.2
7.5
-0.7
Value
7.8
7.2
-0.6

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7Hz Timeless II can only be compared against published iems profiles.

Quick Read

7Hz Timeless II

Approved coverage treats the Timeless II as a real second-generation effort rather than a rebadge: the dual-sided 14.5mm planar brings the punchy, fast bass the original was loved for, while the treble extends further and the stage opens up. The consensus verdict is that it is one of the strongest planar IEMs near $229, with the familiar planar caveats: upper-midrange energy that can turn edgy on bright recordings, and a large disc-shaped shell that not every ear tolerates. Compared with the original Timeless, reviewers hear a more refined, more extended, and slightly more expensive-sounding tuning, at a price that moved up alongside it.

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.

7Hz • IEMs

7Hz Timeless II

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Approved coverage treats the Timeless II as a real second-generation effort rather than a rebadge: the dual-sided 14.5mm planar brings the punchy, fast bass the original was loved for, while the treble extends further and the stage opens up. The consensus verdict is that it is one of the strongest planar IEMs near $229, with the familiar planar caveats: upper-midrange energy that can turn edgy on bright recordings, and a large disc-shaped shell that not every ear tolerates. Compared with the original Timeless, reviewers hear a more refined, more extended, and slightly more expensive-sounding tuning, at a price that moved up alongside it.

Strengths

  • Fast, punchy planar bass with strong control and impact
  • Improved treble extension and openness over the original Timeless
  • Wide, immersive staging for a planar IEM at this price

Weaknesses

  • Upper mids can sound harsh or intense on brighter tracks
  • Large disc-style shells remain a fit gamble for smaller ears
  • Price moved up versus the original, thinning its value edge

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