Short answer: the QoA Bijou. It ranks #380 of 1291 in-ear headphones by sound quality, rated 4.1/5, at $111.46; the Agasound Sublimation ranks #437, rated 4.0/5, and costs $115, so there is not much of a tradeoff to weigh.
The case for the QoA Bijou: A broadly balanced tuning with a preference score of 74 against the Harman target. The tradeoff: The rating reflects sound quality only; comfort, build and noise isolation are not part of the score.
What the Agasound Sublimation does well: A broadly balanced tuning with a preference score of 74 against the Harman target. 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 QoA Bijou. It is rated higher for sound quality than the Agasound Sublimation and costs less, which makes it the one to get unless you need something the other one does better.
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A broadly balanced tuning with a preference score of 74 against the Harman target.
Amazon $111.46 eBay
A broadly balanced tuning with a preference score of 74 against the Harman target.
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Specifications Side By Side
| QoA Bijou | Agasound Sublimation | |
|---|---|---|
| Price | $111.46 | $115 |
| Ranked | #380 of 1291 in In-Ear Headphones | #437 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 74 (median of 9 squig.link measurements, calibrated to AutoEQ) | 74 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.69 dB standard deviation | 2.18 dB standard deviation |
| Tonal Tilt | -0.52 (negative is warmer, positive brighter) | -0.16 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Dynamic |
| Drivers | 1 x dynamic, 2 x balanced armature | 1 x 10mm dynamic |
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 QoA Bijou from aftersound, audioamigo, bassaudio, boizoff, faxepremium, jaytiss, practiphile, soundcheck39 and tonedeafmonk; the Agasound Sublimation from aftersound, bassaudio, elrics and fernandagunsan, all via squig.link.
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