Short answer: the FiiO FP3. It ranks #887 of 1369 in-ear headphones by sound quality, rated 3.4/5, at $99.99; the Sound Rhyme SR10 ranks #961, rated 3.3/5, at $99. With prices this close, go by the sound-quality ranking rather than the cost.
What the FiiO FP3 does well: Its 14.5mm planar magnetic driver reaches a Harman preference score of 65.8 across six hobbyist measurements on squig.link, with sub-bass held within about half a dB of target so deep bass is present but not exaggerated. Watch for: The treble is uneven, with a 6.7 dB peak near 7.9 kHz followed by a 5.7 dB dip near 10.2 kHz, so cymbals can sound sharp and then lose sparkle.
The case for the Sound Rhyme SR10: A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap. The tradeoff: Treble about 3 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the FiiO FP3. It is rated higher for sound quality, and the $0.99 you would save on the Sound Rhyme SR10 does not close the gap.
Still deciding? The full Headphones rankings cover every ranked option.
Its 14.5mm planar magnetic driver reaches a Harman preference score of 65.8 across six hobbyist measurements on squig.link, with sub-bass held within about half a dB of target so deep bass is present but not exaggerated.
Amazon $99.99 eBay
A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap.
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Specifications Side By Side
| FiiO FP3 | Sound Rhyme SR10 | |
|---|---|---|
| Price | $99.99 | 99.00 |
| Ranked | #887 of 1369 in In-Ear Headphones | #961 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 66 (median of 6 squig.link measurements, calibrated to AutoEQ) | 65 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.72 dB standard deviation | 2.39 dB standard deviation |
| Tonal Tilt | -0.28 (negative is warmer, positive brighter) | -1.03 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.0 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Planar magnetic | Tribrid |
| Drivers | 1 x 14.5mm planar magnetic | 10 drivers (2 dynamic drivers + 4 balanced armatures + 4 micro planar drivers) |
| Impedance | 36 ohms | 18 ohms |
| Sensitivity | 105 dB/mW | 115 dB |
| Weight | 0 lbs (6.5 g) per earpiece | - |
| Frequency Response | 10Hz - 40kHz (Manufacturer specified) | 10Hz - 40kHz |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the FiiO FP3 from atechreviews, audioamigo, dchpgall, jaytiss, koi and practiphile; the Sound Rhyme SR10 from atechreviews, flare and sl0the, all via squig.link.
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