Short answer: the KBear Tourbillon Pro. It ranks #892 of 1369 in-ear headphones by sound quality, rated 3.4/5, at $99; the Sound Rhyme SR10 ranks #961, rated 3.3/5, at $99. Close enough in price that the sound-quality gap is the deciding factor.
The case for the KBear Tourbillon Pro: A broadly balanced tuning with a preference score of 66 against the Harman target. The catch: Treble about 2 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Why pick 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 catch: Treble about 3 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the KBear Tourbillon Pro. It is rated higher for sound quality than the Sound Rhyme SR10 at the same price, so only choose the other one for a particular feature it does better.
Still deciding? The full Headphones rankings cover every ranked option.
A broadly balanced tuning with a preference score of 66 against the Harman target.
KeepHiFi $99.00 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
| KBear Tourbillon Pro | Sound Rhyme SR10 | |
|---|---|---|
| Price | $99.00 | 99.00 |
| Ranked | #892 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 | 2.32 dB standard deviation | 2.39 dB standard deviation |
| Tonal Tilt | -0.89 (negative is warmer, positive brighter) | -1.03 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.5 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.0 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Tribrid |
| Drivers | 1 x 10mm dynamic driver (PU + PEEK + DLC composite diaphragm) | 10 drivers (2 dynamic drivers + 4 balanced armatures + 4 micro planar drivers) |
| Impedance | 19 ohms | 18 ohms |
| Sensitivity | 101 dB/mW | 115 dB |
| Frequency Response | 20Hz - 20kHz | 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 KBear Tourbillon Pro from audioamigo, eplv, practiphile, pw, soundcheck39 and tonedeafmonk; the Sound Rhyme SR10 from atechreviews, flare and sl0the, all via squig.link.
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How KBear Tourbillon Pro compares with other leading options: