The FiiO JT9 ranks #81 out of 517 total Over-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Fiio
Prices on this page were last checked October 20, 2026 at 10:35 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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#81 FiiO JT9: $159.99 Amazon $159.99 eBay
Pros: An open back planar at about $160 with a preference score of 86, a 20 ohm load that runs from most sources, and both 3.5 mm and 4.4 mm cables in the box. The lower mids and presence stay within about 1 dB of target.
Cons: Sub bass is 4.7 dB low at 30 Hz, so the deepest bass is light, and an 11.8 dB dip near 9.7 kHz dulls cymbals. It weighs 365 g, and the score rests on a single measurement.
Is the FiiO JT9 right for you?
Buy it if
- you want the tuning most listeners prefer in blind tests out of the box (Harman score 86).
Skip it if
- you need isolation or will use it in public: open-back headphones leak sound both ways.
- you want the best value: the higher-rated Kiwi Ears x Z Reviews Serene costs about $49 less.
| Released | Aug 2026 (2 months ago) |
|---|---|
| Back | Open |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.21 dB standard deviation |
| Driver Type | Planar magnetic |
| Drivers | 1 x 95x86mm planar magnetic |
| Form Factor | Over-ear |
| Harman Preference Score | 86 (1 squig.link measurement, calibrated to AutoEQ) |
| Impedance | 20 ohms |
| Sensitivity | 95 dB/mW at 1 kHz |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-4.5 dB at 30 Hz) |
| Tonal Tilt | -0.19 (negative is warmer, positive brighter) |
| Weight | 0.8 lbs (365 g) |
EQ Presets
Neutral target
Set a preamp of -4.3 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 76 out of 100, up from 67.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -2.8 dB | 0.70 |
| High shelf | 10,000 Hz | -3.2 dB | 0.70 |
| Peak | 1,850 Hz | +4.7 dB | 4.64 |
| Peak | 3,093 Hz | -4.1 dB | 4.33 |
Studio flat target
Set a preamp of -5.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 83 out of 100, up from 36.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -4.7 dB | 0.70 |
| High shelf | 10,000 Hz | +1.9 dB | 0.70 |
| Peak | 230 Hz | -3.7 dB | 0.40 |
| Peak | 1,966 Hz | +6.0 dB | 2.86 |
Warm target
Set a preamp of -6.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 84 out of 100, up from 81.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.8 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 23 Hz | +3.8 dB | 3.86 |
| Peak | 1,859 Hz | +4.2 dB | 4.02 |
| Peak | 3,241 Hz | -5.2 dB | 3.21 |
| Peak | 5,926 Hz | -2.9 dB | 2.30 |
Bass target
Set a preamp of -5.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 82 out of 100, up from 76.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.3 dB | 0.70 |
| High shelf | 10,000 Hz | -3.2 dB | 0.70 |
| Peak | 1,850 Hz | +4.7 dB | 4.64 |
| Peak | 3,093 Hz | -4.1 dB | 4.33 |
Bright target
Set a preamp of -4.9 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 78 out of 100, up from 49.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -2.9 dB | 0.70 |
| Peak | 23 Hz | +4.6 dB | 3.70 |
| Peak | 196 Hz | -2.0 dB | 0.40 |
| Peak | 918 Hz | -1.6 dB | 3.74 |
| Peak | 1,466 Hz | +1.7 dB | 6.00 |
| Peak | 1,857 Hz | +4.7 dB | 4.50 |
| Peak | 2,163 Hz | +1.7 dB | 6.00 |
| Peak | 3,069 Hz | -3.7 dB | 4.78 |
| Peak | 4,905 Hz | +2.5 dB | 1.74 |
V-shaped target
Set a preamp of -5.8 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 76 out of 100, up from 71.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.7 dB | 0.70 |
| High shelf | 10,000 Hz | +0.5 dB | 0.70 |
| Peak | 891 Hz | -2.5 dB | 2.52 |
| Peak | 1,509 Hz | +1.7 dB | 5.60 |
| Peak | 1,877 Hz | +4.9 dB | 4.43 |
| Peak | 3,096 Hz | -3.6 dB | 4.86 |
| Peak | 4,905 Hz | +3.0 dB | 1.36 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the FiiO JT9 measures across the audible range, against the Harman over-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 a single measurement, and both lines are shifted so their 500 Hz to 2 kHz average sits at 0 dB.
Measurement data: a single measurement from the squig.link database of sai. Thanks to them for publishing their work.