The PMG Audio Apx ranks #463 out of 1253 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: PMG Audio
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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#463 PMG Audio Apx: $5,500 Discontinued eBay
Newer model: the PMG Audio Apx SE, ranked lower, rated 3.8/5 (also discontinued). See every PMG Audio Apx generation.
Pros: A broadly balanced tuning with a preference score of 73 against the Harman target.
Cons: An uneven response, 2.0 dB standard deviation from target. Discontinued.
Is the PMG Audio Apx 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 15 points.
Skip it if
- you want to buy it new: it is discontinued.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.03 dB standard deviation |
| Driver Type | Quadbrid (1 dynamic + 7 balanced armature + 2 planar magnetic + 1 piezoelectric) |
| Drivers | 1 x dynamic + 7 x balanced armature + 2 x planar magnetic + 1 x piezoelectric |
| Form Factor | In-ear |
| Harman Preference Score | 73 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.8 dB at 30 Hz) |
| Tonal Tilt | -0.31 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -3.3 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 88 out of 100, up from 73.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -1.8 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 196 Hz | -2.9 dB | 0.89 |
| Peak | 2,374 Hz | +2.8 dB | 2.83 |
| Peak | 3,893 Hz | +1.7 dB | 1.31 |
| Peak | 5,375 Hz | -4.0 dB | 6.00 |
| Peak | 8,000 Hz | -1.9 dB | 3.83 |
Neutral target
Set a preamp of -3.3 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 90 out of 100, up from 37.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.3 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 34 Hz | -1.5 dB | 3.82 |
| Peak | 186 Hz | -2.7 dB | 0.72 |
| Peak | 2,372 Hz | +2.8 dB | 2.79 |
| Peak | 3,893 Hz | +1.7 dB | 1.30 |
| Peak | 5,375 Hz | -4.0 dB | 6.00 |
| Peak | 8,000 Hz | -1.9 dB | 3.83 |
Studio flat target
Set a preamp of -6.2 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 90 out of 100, up from 18.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.7 dB | 0.70 |
| High shelf | 10,000 Hz | -4.2 dB | 0.70 |
| Peak | 171 Hz | -4.7 dB | 0.65 |
| Peak | 2,553 Hz | +6.0 dB | 2.43 |
| Peak | 3,573 Hz | +0.9 dB | 1.85 |
| Peak | 5,412 Hz | -5.2 dB | 6.00 |
| Peak | 7,093 Hz | -1.0 dB | 3.28 |
Warm 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 86 out of 100, up from 74.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -1.5 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 190 Hz | -2.7 dB | 0.93 |
| Peak | 2,354 Hz | +2.0 dB | 3.40 |
| Peak | 3,893 Hz | +0.9 dB | 1.01 |
| Peak | 5,222 Hz | -1.6 dB | 6.00 |
| Peak | 5,932 Hz | -4.2 dB | 2.29 |
| Peak | 8,000 Hz | -3.5 dB | 4.46 |
Bass target
Set a preamp of -3.3 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 90 out of 100, up from 73.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.0 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 54 Hz | +1.3 dB | 4.46 |
| Peak | 200 Hz | -2.9 dB | 0.94 |
| Peak | 2,374 Hz | +2.8 dB | 2.84 |
| Peak | 3,893 Hz | +1.7 dB | 1.32 |
| Peak | 5,375 Hz | -4.0 dB | 6.00 |
| Peak | 8,000 Hz | -1.9 dB | 3.83 |
Bright target
Set a preamp of -3.6 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 85 out of 100, up from 30.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.3 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 3,893 Hz | +3.6 dB | 0.79 |
V-shaped target
Set a preamp of -4.3 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 93 out of 100, up from 78.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.7 dB | 0.70 |
| High shelf | 10,000 Hz | -5.3 dB | 0.70 |
| Peak | 54 Hz | +1.2 dB | 4.94 |
| Peak | 197 Hz | -1.5 dB | 1.08 |
| Peak | 1,250 Hz | -1.8 dB | 3.07 |
| Peak | 2,303 Hz | +1.8 dB | 4.18 |
| Peak | 3,893 Hz | +4.2 dB | 0.76 |
| Peak | 5,255 Hz | -1.9 dB | 6.00 |
| Peak | 8,000 Hz | +1.3 dB | 1.40 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the PMG Audio Apx 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 3 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 3 measurements from the squig.link databases of animagus, hbb and vsg. Thanks to each of them for publishing their work.