Fiio FD5 VS Letshuoer S15
IEM Comparison: Expert & Community Scores Side-by-Side
Fiio FD5 and Letshuoer S15 are in-ear monitors. Fiio FD5 costs $300 while Letshuoer S15 costs $329. Letshuoer S15 is $29 more expensive. Letshuoer S15 holds a decisive 1.7-point edge in reviewer scores (5.7 vs 7.4). Letshuoer S15 has significantly better bass with a 1.5-point edge, Letshuoer S15 has significantly better mids with a 3.5-point edge, Letshuoer S15 has significantly better treble with a 2.8-point edge, Letshuoer S15 has significantly better dynamics with a 1-point edge, Letshuoer S15 has significantly better soundstage with a 1.8-point edge, Letshuoer S15 has significantly better details with a 2-point edge and Letshuoer S15 has significantly better imaging with a 2-point edge.
Insights
| Metric | Fiio FD5 | Letshuoer S15 |
|---|---|---|
| Bass | 5 | 6.5 |
| Mids | 4 | 7.5 |
| Treble | 3.7 | 6.5 |
| Details | 4.5 | 6.5 |
| Soundstage | 5 | 6.8 |
| Imaging | 5 | 7 |
| Dynamics | 5 | 6 |
| Tonality | 4.6 | 7 |
| Technicalities | 4.8 | 7.1 |
Fiio FD5 Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
5.7Mixed
Letshuoer S15 Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
7.4Generally Favorable
Reviews Comparison
Fiio FD5 reviewed by Jaytiss
2025-09-30
5
Reviewer Score
Letshuoer S15 reviewed by Jaytiss
2025-07-16
8
Reviewer Score
Jaytiss Youtube Channel
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Fiio FD5 reviewed by Head-Fi.org
7.5
* score rescaled + normalized
Letshuoer S15 reviewed by Head-Fi.org
8.3
* score rescaled + normalized
Fiio FD5 (more reviews)
Fiio FD5 reviewed by Z-Reviews
7.2
* score rescaled + normalized
Fiio FD5 reviewed by Super* Review
6*
* score rescaled + normalized
Fiio FD5 reviewed by Crin
5.5
Reviewer Score
Crin Youtube Channel
Fiio FD5 reviewed by Precogvision
4.4
Reviewer Score
Precogvision Youtube Channel
Fiio FD5 reviewed by Nymz
4
Reviewer Score
Letshuoer S15 (more reviews)
Letshuoer S15 reviewed by Shuwa-T
6.6
Reviewer Score
Letshuoer S15 reviewed by Jays Audio
6.5
Reviewer Score
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 Youtube Channel
Fiio FD5 Details
Driver Configuration: 1DD
Tuning Type: V-Shaped
Brand: FiiO Top FiiO IEMs
Price (Msrp): $300
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Letshuoer S15 Details
Driver Configuration:
Tuning Type: n/a
Brand: Letshuoer Top Letshuoer IEMs
Price (Msrp): $329
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Fiio FD5 User Review Score
Average User Scores
Average User Score: n/a
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Letshuoer S15 User Review Score
Average User Scores
Average User Score: n/a
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Fiio FD5 Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
4.8Gaming Grade
CLetshuoer S15 Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.8Gaming Grade
B+Fiio FD5 Scorings
Average Technical & Tuning Grades
Average Tunign Grade
C- It struggles with balance, producing a lumpy response that rarely sounds coherent. Genre hopping highlights glaring inconsistencies.
Average Technical Grade
C- Details smear quickly, leaving the presentation cramped and low on definition. You'll notice smearing on even moderately layered songs.
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.
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