The EarAcoustic STA Pro Max ranks #1085 out of 1398 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: EarAcoustic
Prices on this page were last checked October 19, 2026 at 10:32 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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#1085 EarAcoustic STA Pro Max: $79.90 HiFiGo $79.90 eBay
Pros: A dual dynamic driver earphone with sub bass reaching fully to 20 Hz and bass about 3 dB above target, giving a full low end, while the midrange stays close to the Harman target. 110 dB sensitivity and 30 ohm impedance make it easy to drive from a phone.
Cons: Upper bass sits nearly 5 dB above target, which thickens the sound, and a 7 dB peak near 8.2 kHz after a dip near 5.9 kHz makes the treble uneven and can emphasize sibilance. The EPZ Q5 Pro scores much higher for a similar price.
Is the EarAcoustic STA Pro Max 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 27 points.
Skip it if
- you want the best value: the higher-rated EPZ G10 costs about $56 less.
| Released | Mar 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.71 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm LCP dynamic + 1 x 6mm titanium-plated dynamic |
| Form Factor | In-ear |
| Harman Preference Score | 62 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 30 ohms |
| Sensitivity | 110 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.3 dB at 30 Hz) |
| Tonal Tilt | -0.80 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -3.5 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 89 out of 100, up from 62.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -1.7 dB | 0.70 |
| High shelf | 10,000 Hz | -3.5 dB | 0.70 |
| Peak | 23 Hz | +1.5 dB | 1.45 |
| Peak | 176 Hz | -5.7 dB | 0.75 |
| Peak | 801 Hz | +1.5 dB | 2.96 |
| Peak | 1,716 Hz | -1.1 dB | 2.97 |
| Peak | 3,174 Hz | +2.1 dB | 4.42 |
| Peak | 5,345 Hz | +2.9 dB | 0.88 |
| Peak | 7,665 Hz | -3.8 dB | 6.00 |
Neutral target
Set a preamp of -3.4 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 91 out of 100, up from 27.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.2 dB | 0.70 |
| High shelf | 10,000 Hz | -3.5 dB | 0.70 |
| Peak | 23 Hz | +1.1 dB | 1.81 |
| Peak | 76 Hz | -0.9 dB | 2.89 |
| Peak | 174 Hz | -5.6 dB | 0.68 |
| Peak | 785 Hz | +1.5 dB | 2.64 |
| Peak | 1,722 Hz | -1.2 dB | 2.97 |
| Peak | 3,178 Hz | +2.0 dB | 4.45 |
| Peak | 5,345 Hz | +2.8 dB | 0.83 |
| Peak | 7,666 Hz | -3.8 dB | 6.00 |
Studio flat target
Set a preamp of -5.3 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 90 out of 100, up from 8.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -12.0 dB | 0.70 |
| High shelf | 10,000 Hz | +0.9 dB | 0.70 |
| Peak | 174 Hz | -7.6 dB | 0.73 |
| Peak | 339 Hz | -1.0 dB | 2.77 |
| Peak | 816 Hz | +1.4 dB | 2.86 |
| Peak | 1,646 Hz | -0.9 dB | 3.96 |
| Peak | 3,011 Hz | +5.3 dB | 1.92 |
| Peak | 4,518 Hz | -1.4 dB | 6.00 |
| Peak | 5,870 Hz | +2.7 dB | 6.00 |
| Peak | 7,669 Hz | -2.4 dB | 6.00 |
Warm target
Set a preamp of -2.4 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 91 out of 100, up from 70.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -1.5 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 23 Hz | +1.6 dB | 1.44 |
| Peak | 174 Hz | -5.5 dB | 0.77 |
| Peak | 804 Hz | +1.8 dB | 2.70 |
| Peak | 1,761 Hz | -1.4 dB | 2.89 |
| Peak | 3,267 Hz | +2.1 dB | 4.94 |
| Peak | 5,834 Hz | +3.5 dB | 6.00 |
| Peak | 7,737 Hz | -3.9 dB | 6.00 |
Bass target
Set a preamp of -3.7 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 90 out of 100, up from 68.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.1 dB | 0.70 |
| High shelf | 10,000 Hz | -3.5 dB | 0.70 |
| Peak | 23 Hz | +1.7 dB | 1.31 |
| Peak | 179 Hz | -5.7 dB | 0.78 |
| Peak | 803 Hz | +1.5 dB | 3.02 |
| Peak | 1,715 Hz | -1.1 dB | 2.97 |
| Peak | 3,174 Hz | +2.1 dB | 4.41 |
| Peak | 5,345 Hz | +2.9 dB | 0.89 |
| Peak | 7,664 Hz | -3.8 dB | 6.00 |
Bright target
Set a preamp of -5.3 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 86 out of 100, up from 16.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.3 dB | 0.70 |
| Peak | 174 Hz | -5.6 dB | 0.66 |
| Peak | 4,708 Hz | +5.2 dB | 1.08 |
V-shaped target
Set a preamp of -5.6 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 85 out of 100, up from 61.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.7 dB | 0.70 |
| High shelf | 10,000 Hz | +0.9 dB | 0.70 |
| Peak | 174 Hz | -4.3 dB | 0.76 |
| Peak | 4,708 Hz | +5.5 dB | 1.00 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the EarAcoustic STA Pro Max 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 5 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 5 measurements from the squig.link databases of audioamigo, avishai, enemyspider, koi and pw. Thanks to each of them for publishing their work.