Short answer: the Agasound Sublimation Burnout. Both are rated 4.1/5 for sound quality (#371 and #337 of 1291 in-ear headphones), and the Agasound Sublimation Burnout costs $179 against $199 for the IKKO OH10S, with sound quality a draw, the lower price decides it.
Why pick the Agasound Sublimation Burnout: A broadly balanced tuning with a preference score of 75 against the Harman target. Watch for: Treble about 2 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
What the IKKO OH10S does well: The median of 4 hobbyist measurements gives it a very good Harman preference score of 75 with a 1.71 dB spread, and its mids sit within about 0.7 dB of target, so vocals and instruments sound natural. The catch: A 5.7 dB peak near 8.2 kHz can make cymbals and sibilance sound sharp.
Buy the Agasound Sublimation Burnout. Both are rated the same for sound quality, and it costs $20 less than the IKKO OH10S.
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A broadly balanced tuning with a preference score of 75 against the Harman target.
e-earphone (JP) eBay
The median of 4 hobbyist measurements gives it a very good Harman preference score of 75 with a 1.71 dB spread, and its mids sit within about 0.7 dB of target, so vocals and instruments sound natural.
IKKO $199.00 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
| Agasound Sublimation Burnout | IKKO OH10S | |
|---|---|---|
| Price | $179 | $199.00 |
| Ranked | #371 of 1291 in In-Ear Headphones | #337 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 75 (median of 3 squig.link measurements, calibrated to AutoEQ) | 75 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.04 dB standard deviation | 1.71 dB standard deviation |
| Tonal Tilt | -0.17 (negative is warmer, positive brighter) | -0.49 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.8 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x dynamic, 2 x balanced armature | 1 x 10mm dynamic + 1 x balanced armature |
| Impedance | - | 18 ohms |
| Sensitivity | - | 106 dB |
| Frequency Response | - | 20Hz - 40kHz (Manufacturer specified) |
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 Agasound Sublimation Burnout from aftersound, elrics and soundignity; the IKKO OH10S from ianfann, iemworld, soundcheck39 and timmyv, all via squig.link.
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