The FiiO FH9 ranks #501 out of 1061 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Fiio
Prices on this page were last checked October 15, 2026 at 5:41 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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#501 FiiO FH9: $559.99 Amazon $559.99 eBay
Pros: A hybrid flagship with a 13.6mm DLC dynamic driver and six Knowles balanced armatures. Measurements show bass and treble both within 1 dB of the Harman target (score 71 across three measurements).
Cons: A 2.35 dB spread from the target shows peaks and dips that better tuned sets avoid. Its score rests on three measurements.
Is the FiiO FH9 right for you?
Buy it if
- you want sub-bass rumble that reaches down to 20 Hz.
- you are happy to use EQ: our preset lifts its Harman match by about 15 points.
Skip it if
- you want the best value: the higher-rated EPZ G10 costs about $536 less.
| Released | 2021 (5 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.35 dB standard deviation |
| Driver Type | Hybrid |
| Drivers | 1 x 13.6mm dynamic + 6 x Knowles balanced armature |
| Form Factor | In-ear |
| Harman Preference Score | 71 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 18 ohms |
| Sensitivity | 108 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.2 dB at 30 Hz) |
| Tonal Tilt | -0.14 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -5.0 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 86 out of 100, up from 71.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.8 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 188 Hz | -4.4 dB | 0.73 |
| Peak | 2,060 Hz | +1.8 dB | 4.21 |
| Peak | 5,892 Hz | +5.4 dB | 3.50 |
Neutral target
Set a preamp of -5.0 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 89 out of 100, up from 44.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -7.7 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 186 Hz | -4.3 dB | 0.65 |
| Peak | 2,055 Hz | +1.8 dB | 4.06 |
| Peak | 5,892 Hz | +5.4 dB | 3.50 |
Studio flat target
Set a preamp of -3.6 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 86 out of 100, up from 26.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.3 dB | 0.70 |
| High shelf | 10,000 Hz | +1.4 dB | 0.70 |
| Peak | 185 Hz | -6.2 dB | 0.71 |
| Peak | 2,230 Hz | +2.6 dB | 4.40 |
| Peak | 5,345 Hz | +2.0 dB | 0.40 |
Warm target
Set a preamp of -3.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 84 out of 100, up from 72.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.1 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 186 Hz | -4.1 dB | 0.73 |
| Peak | 2,863 Hz | -2.3 dB | 6.00 |
| Peak | 4,524 Hz | -2.0 dB | 6.00 |
| Peak | 6,073 Hz | +3.8 dB | 6.00 |
Bass target
Set a preamp of -5.0 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 88 out of 100, up from 62.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +4.6 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 192 Hz | -4.4 dB | 0.76 |
| Peak | 2,061 Hz | +1.8 dB | 4.25 |
| Peak | 5,893 Hz | +5.4 dB | 3.51 |
Bright target
Set a preamp of -5.3 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 87 out of 100, up from 34.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -7.8 dB | 0.70 |
| High shelf | 10,000 Hz | -0.8 dB | 0.70 |
| Peak | 186 Hz | -4.4 dB | 0.65 |
| Peak | 2,075 Hz | +1.8 dB | 4.32 |
| Peak | 5,391 Hz | +5.3 dB | 1.63 |
V-shaped target
Set a preamp of -5.2 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 85 out of 100, up from 63.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.2 dB | 0.70 |
| High shelf | 10,000 Hz | +0.6 dB | 0.70 |
| Peak | 189 Hz | -3.0 dB | 0.75 |
| Peak | 2,102 Hz | +2.0 dB | 5.27 |
| Peak | 5,103 Hz | +4.9 dB | 1.20 |
- Links
- Reviews, Comparisons and Sound Samples
Frequency Response
How the FiiO FH9 measures across the audible range, against the Harman in-ear target that most listeners prefer in blind tests. Where the line sits above the target that range sounds louder (more bass, brighter treble), below it quieter. The curve is the median of 3 independent measurements, so one odd sample or rig cannot skew it, and both lines are shifted so their 500 Hz to 2 kHz average sits at 0 dB.
Measurement data: median of 3 measurements from the squig.link databases of ekaudio, jaytiss and therollo9. Thanks to each of them for publishing their work.