The QoA Bijou ranks #380 out of 1253 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: QoA
Prices 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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#380 QoA Bijou: $115 eBay
Pros: A broadly balanced tuning with a preference score of 74 against the Harman target.
Cons: The rating reflects sound quality only; comfort, build and noise isolation are not part of the score.
Is the QoA Bijou right for you?
Buy it if
- you want sub-bass rumble that reaches down to 20 Hz.
- you are happy to use EQ: our preset lifts its Harman match by about 14 points.
Skip it if
- you want the best value: the higher-rated EPZ G10 costs about $91 less.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 1.69 dB standard deviation |
| Driver Type | Hybrid |
| Drivers | 1 x dynamic, 2 x balanced armature |
| Form Factor | In-ear |
| Harman Preference Score | 74 (median of 9 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.7 dB at 30 Hz) |
| Tonal Tilt | -0.52 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -0.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 88 out of 100, up from 74.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -2.2 dB | 0.70 |
| High shelf | 10,000 Hz | -0.9 dB | 0.70 |
| Peak | 186 Hz | -3.9 dB | 0.83 |
| Peak | 4,865 Hz | -3.2 dB | 4.00 |
Neutral target
Set a preamp of -0.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 90 out of 100, up from 35.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.8 dB | 0.70 |
| High shelf | 10,000 Hz | -0.9 dB | 0.70 |
| Peak | 186 Hz | -3.7 dB | 0.72 |
| Peak | 4,866 Hz | -3.2 dB | 4.02 |
Studio flat target
Set a preamp of -4.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 87 out of 100, up from 15.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -12.0 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 168 Hz | -5.8 dB | 0.70 |
| Peak | 2,564 Hz | +4.3 dB | 2.71 |
| Peak | 4,223 Hz | -1.9 dB | 6.00 |
| Peak | 5,047 Hz | -5.0 dB | 4.45 |
Warm target
Set a preamp of -1.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 93 out of 100, up from 79.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -2.0 dB | 0.70 |
| High shelf | 10,000 Hz | -4.5 dB | 0.70 |
| Peak | 186 Hz | -3.7 dB | 0.89 |
| Peak | 732 Hz | +1.4 dB | 2.27 |
| Peak | 1,391 Hz | -1.0 dB | 4.68 |
| Peak | 2,599 Hz | +0.9 dB | 3.03 |
| Peak | 4,957 Hz | -4.6 dB | 1.68 |
| Peak | 7,719 Hz | -2.2 dB | 6.00 |
Bass target
Set a preamp of -1.6 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 91 out of 100, up from 79.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.6 dB | 0.70 |
| High shelf | 10,000 Hz | -0.9 dB | 0.70 |
| Peak | 186 Hz | -3.9 dB | 0.87 |
| Peak | 4,864 Hz | -3.2 dB | 3.98 |
Bright target
Set a preamp of -2.3 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 88 out of 100, up from 27.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.8 dB | 0.70 |
| High shelf | 10,000 Hz | +1.9 dB | 0.70 |
| Peak | 186 Hz | -3.8 dB | 0.72 |
| Peak | 5,659 Hz | +1.4 dB | 0.40 |
V-shaped target
Set a preamp of -2.6 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 88 out of 100, up from 76.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.2 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 186 Hz | -2.5 dB | 0.92 |
| Peak | 1,314 Hz | -1.5 dB | 4.59 |
| Peak | 2,566 Hz | +1.5 dB | 3.45 |
| Peak | 4,321 Hz | -1.6 dB | 5.26 |
| Peak | 5,607 Hz | +1.8 dB | 0.45 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the QoA Bijou measures across the audible range, against the Harman in-ear target that most listeners prefer in blind tests. Where the line sits above the target that range sounds louder (more bass, brighter treble), below it quieter. The curve is the median of 9 independent measurements, so one odd sample or rig cannot skew it, and both lines are shifted so their 500 Hz to 2 kHz average sits at 0 dB.
Measurement data: median of 9 measurements from the squig.link databases of aftersound, audioamigo, bassaudio, boizoff, faxepremium, jaytiss, practiphile, soundcheck39 and tonedeafmonk. Thanks to each of them for publishing their work.