Short answer: the Kotori Audio Zephyr. It ranks #994 of 1369 in-ear headphones by sound quality, rated 3.2/5, at $50; the Audio-Technica ATH-SPORT7TW ranks #1071, rated 3.0/5, and costs $53.04, so there is not much of a tradeoff to weigh.
What the Kotori Audio Zephyr does well: 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 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
What the Audio-Technica ATH-SPORT7TW does well: Its tonal tilt of +0.01 sits close to the target, so the overall balance is neither dark nor bright. The tradeoff: A Harman score of 62 places it in the lower part of the in-ear rankings.
Buy the Kotori Audio Zephyr. It is rated higher for sound quality than the Audio-Technica ATH-SPORT7TW and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphones rankings.
A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap.
Kotori Audio eBay
Its tonal tilt of +0.01 sits close to the target, so the overall balance is neither dark nor bright.
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Specifications Side By Side
| Kotori Audio Zephyr | Audio-Technica ATH-SPORT7TW | |
|---|---|---|
| Price | 50.00 | $53.04 |
| Ranked | #994 of 1369 in In-Ear Headphones | #1071 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | - |
| Harman Preference Score | 64 (median of 4 squig.link measurements, calibrated to AutoEQ) | 62 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 2.92 dB standard deviation | 3.56 dB standard deviation |
| Tonal Tilt | -0.25 (negative is warmer, positive brighter) | +0.01 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-4.5 dB at 30 Hz) | - |
| Driver Type | Hybrid | Dynamic |
| Drivers | 1 dynamic driver + 1 balanced armature (10mm titanium dynamic driver + Knowles balanced armature) | 1 x 5.8mm dynamic |
| Impedance | 18.3 ohms | 14 ohms |
| Sensitivity | 92.6 dB SPL | 91 dB/mW |
| Frequency Response | 20Hz - 20kHz | 20Hz - 25kHz |
| Weight | 0 lbs (5.2 g) | 0 lbs (6.4 g) (pair) |
| Connection | Wired | True wireless |
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