Short answer: the Hisenior T4. It ranks #804 of 1291 in-ear headphones by sound quality, rated 3.5/5, at $199; the Sound Rhyme SR6 ranks #887, rated 3.4/5, at $198. The price gap is small enough that the sound-quality ranking should decide it.
What the Hisenior T4 does well: A broadly balanced tuning with a preference score of 68 against the Harman target. The tradeoff: Treble about 3 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
The case for the Sound Rhyme SR6: A broadly balanced tuning with a preference score of 66 against the Harman target. The catch: An uneven response, 2.3 dB standard deviation from target.
Buy the Hisenior T4. It is rated higher for sound quality, and the $1 you would save on the Sound Rhyme SR6 does not close the gap.
Still deciding? The full Headphones rankings cover every ranked option.
A broadly balanced tuning with a preference score of 68 against the Harman target.
Amazon $199 eBay
A broadly balanced tuning with a preference score of 66 against the Harman target.
Penon Audio $198.00 eBayPrices on this page were last checked October 16, 2026 at 5:46 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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Specifications Side By Side
| Hisenior T4 | Sound Rhyme SR6 | |
|---|---|---|
| Price | $199 | $198.00 |
| Ranked | #804 of 1291 in In-Ear Headphones | #887 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 68 (median of 6 squig.link measurements, calibrated to AutoEQ) | 66 (median of 6 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.66 dB standard deviation | 2.33 dB standard deviation |
| Tonal Tilt | +0.13 (negative is warmer, positive brighter) | -0.77 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-5.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.6 dB at 30 Hz) |
| Connection | Wired (3.5mm / 4.4mm) | Wired |
| Driver Type | Balanced Armature | Quad-brid (1 DD + 2 BA + 2 Planar + 1 Bone Conduction) |
| Drivers | 4 Balanced Armature | 1 x 10mm dynamic driver (LCP) + 2 x balanced armatures (2389D) + 2 x micro planar drivers + 1 x piezoelectric bone conduction driver |
| Impedance | - | 33 ohms |
| Sensitivity | - | 106 dB |
| Frequency Response | - | 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 Hisenior T4 from digaoreviews, ducbloke, flare, iemocean, sl0the and soundcheck39; the Sound Rhyme SR6 from audioamigo, breampike, flare, jaytiss, practiphile and soundcheck39, all via squig.link.
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