Moondrop Harmon VS Letshuoer S15

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

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Moondrop Harmon and Letshuoer S15 are in-ear monitors. Moondrop Harmon costs $350 while Letshuoer S15 costs $329. Moondrop Harmon is $21 more expensive. Letshuoer S15 holds a decisive 1-point edge in reviewer scores (6.3 vs 7.4). Letshuoer S15 has significantly better mids with a 2.5-point edge, Letshuoer S15 has significantly better treble with a 1.5-point edge, Moondrop Harmon has significantly better dynamics with a 1-point edge and Letshuoer S15 has better soundstage with a 0.8-point edge.

Insights

Metric Moondrop Harmon Letshuoer S15
Bass 6.3 6.5
Mids 5 7.5
Treble 5 6.5
Details 6.3 6.5
Soundstage 6 6.8
Imaging 6.3 7
Dynamics 7 6
Tonality 6.7 7
Technicalities 6.3 7.1
Take these comparisons with a grain of salt—we don't have enough Moondrop Harmon and Letshuoer S15 reviews saved yet to provide an unbiased result.

Moondrop Harmon Aggregated Review Score

Average Reviewer Scores

Jaytiss Jays Audio Z-Reviews Super* Review

Average Reviewer Score:

6.3

Mixed to Positive

Letshuoer S15 Aggregated Review Score

Average Reviewer Scores

Shuwa-T Jays Audio
Jaytiss Head-Fi.org

Average Reviewer Score:

7.4

Generally Favorable

Reviews Comparison

Moondrop Harmon reviewed by Jaytiss

Jaytiss 6.8 Reviewer Score
B- Tuning
C+ Tech
While fun, and a nice tune, it's not the best value to be had.

Jaytiss original ranking

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

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Price: $349

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Letshuoer S15 reviewed by Jaytiss

2025-07-16
Jaytiss 8 Reviewer Score
A- Tuning
A- Tech
Nice Clarity, good detail. I feel it should have got more love.

Jaytiss original ranking

Jaytiss Youtube Channel
Mids: A+ Treble: A- Dynamics: B Soundstage: A-

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Price: $329

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Moondrop Harmon reviewed by Jays Audio

Jays Audio 6.5 Reviewer Score
A Tuning
A Tech
Clean Harman 2019 sound. Clear and balanced, but can still be shouty in the vocals. New Crossover and 3DD talk is marketing jargon not that much difference vs other DDs. You can just buy Nova or SUPERMIX4 if you want Harman for more than half the price. Or DynnaQuattro and Chopin is better as well. Sounds "decent" but just overpriced. Also looks like a knockoff cybertruck from temu. Avoid unless you can find it for around $150 or less.

Jays Audio original ranking

Jays Audio Youtube Channel
YouTube video thumbnail

Letshuoer S15 reviewed by Jays Audio

Jays Audio 6.5 Reviewer Score
A Tuning
A Tech
YouTube video thumbnail
Neutral and laid back tuning. Great layering and separation and resolution. Great treble extension and air without being too sharp and light like other planar iems. Bass is also not light and floaty, and doesn't feel like planar bass - not slamming, but tight and well-textured. Vocals are laid back, but not too pushed back although it's not the most extended and powerful, but works very-well as a neutral set. Nice and open staging, and is the direct upgrade to the Hexa and Sonus. Very good safe all-rounder.
Youtube Video Summary

Letshuoer S15 takes the planar recipe in a more natural, neutral direction, dialing back the upper-mids/treble glare that made earlier S12 variants feel “planar.” The result is a heavier note weight, smoother edges, and a timbre closer to a good dynamic driver—without the etched, floaty thinness common to many planars. Vocals sit forward with less Harman-style shout, bass carries satisfying sub-bass rumble with tight mid-bass separation thanks to planar speed, and overall fatigue is low. The trade-off is a presentation that’s more relaxed than hyped: treble sparkle and micro-detail aren’t spotlighted, and those craving sizzle may find it a touch polite.

Against its siblings, S15 is the cleanest, most neutral option—more open and balanced than the darker, ultra-chill S08, and more refined/grounded than older S12 iterations that pushed treble energy. The newer S12 2024 brings back liveliness and air while staying smoother than previous S12s, but S15 remains the pick for a reference-leaning planar with convincing timbre. It costs a bit more than S12 2024, yet what you’re paying for is timbre quality, note density, and a fatigue-free listen that still carries enough low-end punch. For listeners prioritizing naturalness over fireworks, S15 feels like the most mature expression of Letshuoer’s planar line.

Jays Audio original ranking

Jays Audio Youtube Channel

Moondrop Harmon (more reviews)

Moondrop Harmon reviewed by Z-Reviews

Z-Reviews 6 * score rescaled + normalized
check links for more info:

Z-Reviews original ranking

Z-Reviews Youtube Channel
YouTube video thumbnail

Moondrop Harmon reviewed by Super* Review

Super* Review 6* * score rescaled + normalized
Does not actually sound as it graphs. More dominant Bass than you might expect. Warm tilted slightly contrasty sound signature. Kind of a fine IEM.

Super* Review original ranking

Super* Review Youtube Channel
YouTube video thumbnail

Letshuoer S15 (more reviews)

Letshuoer S15 reviewed by Shuwa-T

Shuwa-T 6.6 Reviewer Score
B+ Tuning
B+ Tech
Warmer tuned planar with less emphasis on the lower treble; easier to listen to for longer periods Still plagued by planar timbre, overall clarity takes a hit from warmer signature, slight subbass rolloff to my ears

Shuwa-T original ranking

Shuwa-T Website

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

Letshuoer S15 reviewed by Head-Fi.org

Head-Fi.org 8.3 * score rescaled + normalized
21 community members have rated the LETSHUOER S15 at an average of 4.4/5 on Head-Fi. Overall sentiment: Excellent.

URL to full Review

Head-Fi.org original ranking

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Moondrop Harmon User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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Letshuoer S15 User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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Moondrop Harmon Gaming Score

Gaming Score & Grade

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

Gaming Score

6.1

Gaming Grade

B

Letshuoer S15 Gaming Score

Gaming Score & Grade

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

Gaming Score

6.8

Gaming Grade

B+

Moondrop Harmon Scorings

Average Technical & Tuning Grades

Average Tunign Grade

B+
  • Expect a friendly tonal balance that could use polish but remains inviting. Great for casual listening, less so for purists.

Average Technical Grade

B
  • It offers a competent showing, maintaining cohesion on straightforward arrangements. Complex passages start to challenge it, but never derail the show.
Mids C+
The mids are solid and dependable, though not especially remarkable. Vocals stay reasonably grounded in the mix.
Treble C+
Highs come through with reasonable clarity while staying mostly smooth. Sibilance is mostly controlled.
Dynamics A-
It delivers crisp, authoritative dynamics that keep music thrilling. Subtle level shifts are clearly conveyed.
Soundstage B
You can map the ensemble with confidence thanks to solid spacing and coherent depth layering. Ambient effects feel believable.
Gaming B
Decent spatial awareness for fundamental positioning. Creates satisfying atmosphere in story-driven games while handling basic directional cues. Value-to-cost may not be optimal for gaming-focused users.

Letshuoer S15 Scorings

Average Technical & Tuning Grades

Average Tunign Grade

A-
  • A smooth, agreeable balance keeps the presentation engaging without obvious flaws. Only sensitive ears will nitpick the bumps.

Average Technical Grade

A-
  • Technical chops are reliable, pairing tidy separation with a soundstage that stays conservative. Micro-detail is decent, though never spotlighted.
Bass B+
The bass brings healthy impact, complementing mixes without overpowering them. It keeps up with faster passages cleanly.
Mids A
It delivers an excellent midrange that feels vibrant and true to life. It balances clarity with natural smoothness.
Treble B+
Highs sound lively and extended while remaining controlled. Detail retrieval keeps shimmer intact.
Dynamics B
Dynamic expression is good, delivering solid impact and convincing contrast. Percussion lands with convincing weight.
Soundstage B+
Lateral spread stretches comfortably while front/back cues start to feel convincing. You can trace front-to-back movement.
Details B+
Good resolution with clear articulation of nuances that keeps complex passages intelligible. Micro-details pop without sounding forced.
Imaging A-
Spatial cues respond immediately, reflecting every movement in the mix. Spatial cues respond instantly to the mix.
Gaming B+
Respectable environmental presentation favors atmosphere over precision. Detects obvious directional cues while conveying game world ambiance. Value-to-cost may not be optimal for gaming-focused users.

Moondrop Harmon User Reviews

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Letshuoer S15 User Reviews

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