The AZLA APL-120C ranks #457 out of 1476 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Prices on this page were last checked October 20, 2026 at 10:35 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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#457 AZLA APL-120C: $19.99 Amazon $19.99 eBay
Pros: USB C earphones at about $20 with an inline mic and remote and a preference score of 74. Bass is on target down to 20 Hz, so it sounds full without boom.
Cons: Presence is 3.7 dB hot with peaks of 5.1 dB near 2.6 and 4.3 kHz and 5.5 dB near 7.7 kHz, so voices and cymbals can turn forward and edgy at volume. The cable is fixed, and the score rests on a single measurement.
Is the AZLA APL-120C 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 are treble-sensitive (treble sits about 2.2 dB above target).
- you want the best value: the higher-rated TRN MT5 costs about $5 less.
| Back | Closed |
|---|---|
| Built-in Microphone | Yes |
| Connection | Wired |
| Deviation From Target | 1.96 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 8mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 74 (1 squig.link measurement, calibrated to AutoEQ) |
| Impedance | 16 ohms |
| Sensitivity | 104 dB/mW at 1 kHz |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.5 dB at 30 Hz) |
| Tonal Tilt | +0.10 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -1.8 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, 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 | -1.3 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 164 Hz | -2.8 dB | 0.98 |
| Peak | 829 Hz | +2.2 dB | 1.90 |
| Peak | 2,859 Hz | -5.7 dB | 1.22 |
| Peak | 4,412 Hz | -3.7 dB | 6.00 |
| Peak | 5,942 Hz | +3.2 dB | 6.00 |
Neutral target
Set a preamp of -1.9 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 89 out of 100, up from 42.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -9.8 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 137 Hz | -2.7 dB | 0.75 |
| Peak | 828 Hz | +2.3 dB | 1.90 |
| Peak | 2,859 Hz | -5.7 dB | 1.22 |
| Peak | 4,412 Hz | -3.7 dB | 6.00 |
| Peak | 5,942 Hz | +3.2 dB | 6.00 |
Studio flat 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 a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 85 out of 100, up from 27.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.9 dB | 0.70 |
| High shelf | 10,000 Hz | -3.6 dB | 0.70 |
| Peak | 159 Hz | -4.6 dB | 0.77 |
| Peak | 821 Hz | +2.0 dB | 2.50 |
| Peak | 2,196 Hz | -1.8 dB | 3.84 |
| Peak | 3,893 Hz | -4.7 dB | 1.25 |
| Peak | 4,500 Hz | -2.5 dB | 6.00 |
| Peak | 5,930 Hz | +2.8 dB | 6.00 |
Warm target
Set a preamp of -2.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 91 out of 100, up from 66.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -1.1 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 164 Hz | -2.5 dB | 0.90 |
| Peak | 853 Hz | +2.7 dB | 2.35 |
| Peak | 2,429 Hz | -3.4 dB | 4.34 |
| Peak | 3,893 Hz | -6.5 dB | 0.79 |
| Peak | 5,820 Hz | +4.5 dB | 6.00 |
| Peak | 7,576 Hz | -1.7 dB | 6.00 |
Bass 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 a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 89 out of 100, up from 66.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.5 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 164 Hz | -2.8 dB | 1.03 |
| Peak | 832 Hz | +2.2 dB | 1.95 |
| Peak | 2,859 Hz | -5.7 dB | 1.21 |
| Peak | 4,412 Hz | -3.7 dB | 6.00 |
| Peak | 5,942 Hz | +3.2 dB | 6.00 |
Bright target
Set a preamp of -5.9 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 86 out of 100, up from 34.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -9.9 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 73 Hz | -0.7 dB | 1.61 |
| Peak | 164 Hz | -2.7 dB | 0.81 |
| Peak | 805 Hz | +2.1 dB | 1.90 |
| Peak | 2,569 Hz | -5.4 dB | 1.68 |
| Peak | 4,279 Hz | -2.6 dB | 6.00 |
| Peak | 5,962 Hz | +5.9 dB | 6.00 |
| Peak | 8,000 Hz | +2.0 dB | 1.48 |
V-shaped target
Set a preamp of -5.5 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 82 out of 100, up from 69.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +3.1 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 146 Hz | -1.4 dB | 1.09 |
| Peak | 764 Hz | +1.6 dB | 2.07 |
| Peak | 2,530 Hz | -4.9 dB | 1.80 |
| Peak | 4,278 Hz | -2.7 dB | 6.00 |
| Peak | 5,909 Hz | +6.0 dB | 5.84 |
| Peak | 7,612 Hz | +2.0 dB | 3.00 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the AZLA APL-120C 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 a single measurement, and both lines are shifted so their 500 Hz to 2 kHz average sits at 0 dB.
Measurement data: a single measurement from the squig.link database of takeitslow7. Thanks to them for publishing their work.