The FiiO FX15 ranks #421 out of 946 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Fiio
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#421 FiiO FX15: $699.99 Amazon $699.99 eBay
Pros: Its hybrid of one 10mm dynamic driver, one balanced armature and four electrostatic tweeters delivers a warm, gently V-shaped sound with a preference score of 72 across seven hobbyist measurements. Sub-bass holds near target down to 20 Hz and bass sits about 3 dB above it, giving kick drums real punch. At 24 ohms and 103 dB/mW it runs comfortably from a phone dongle, and each earpiece weighs only 6 g.
Cons: A 7.4 dB peak near 8.1 kHz next to a 4.8 dB dip near 6.1 kHz makes cymbals and sibilants uneven, with some edge on bright tracks. The extra 2 dB in the low mids thickens vocals slightly. The DUNU Zen costs about the same and is rated higher.
| Back | Closed |
|---|---|
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.15 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature + 4 electrostatic) |
| Drivers | 1 x 10mm dynamic + 1 x balanced armature + 4 x electrostatic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 72 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 24 ohms |
| Sensitivity | 103 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.1 dB at 30 Hz) |
| Tonal Tilt | -0.36 (negative is warmer, positive brighter) |
| Weight | 0 lbs (6 g) per earpiece |
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