Short answer: the BEEP Audio Azure. Both are rated 4.1/5 for sound quality (#364 and #380 of 1291 in-ear headphones), and the BEEP Audio Azure costs $105 against $111.46 for the QoA Bijou, so with nothing between them on sound quality, price settles it.
The case for the BEEP Audio Azure: A broadly balanced tuning with a preference score of 75 against the Harman target. Watch for: An uneven response, 1.9 dB standard deviation from target.
Why pick the QoA Bijou: A broadly balanced tuning with a preference score of 74 against the Harman target. Watch for: The rating reflects sound quality only; comfort, build and noise isolation are not part of the score.
Buy the BEEP Audio Azure. Both are rated the same for sound quality, and it costs $6.46 less than the QoA Bijou.
Looking for alternatives? See the complete Headphones rankings.
A broadly balanced tuning with a preference score of 75 against the Harman target.
e-earphone (JP) eBay
A broadly balanced tuning with a preference score of 74 against the Harman target.
Amazon $111.46 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
| BEEP Audio Azure | QoA Bijou | |
|---|---|---|
| Price | $105 | $111.46 |
| Ranked | #364 of 1291 in In-Ear Headphones | #380 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 75 (median of 6 squig.link measurements, calibrated to AutoEQ) | 74 (median of 9 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.92 dB standard deviation | 1.69 dB standard deviation |
| Tonal Tilt | +0.27 (negative is warmer, positive brighter) | -0.52 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.7 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Hybrid |
| Drivers | 2 x dynamic + 1 x balanced armature | 1 x dynamic, 2 x balanced armature |
| Impedance | 14 ohms | - |
| Sensitivity | 105 dB/mW | - |
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 BEEP Audio Azure from audioamigo, digaoreviews, eplv, jaytiss, pw and soundcheck39; the QoA Bijou from aftersound, audioamigo, bassaudio, boizoff, faxepremium, jaytiss, practiphile, soundcheck39 and tonedeafmonk, all via squig.link.
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