The EarAcoustic SPA-Hi End MAX ranks #308 out of 1253 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 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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#308 EarAcoustic SPA-Hi End MAX: $289.90 Discontinued eBay
Pros: A broadly balanced tuning with a preference score of 76 against the Harman target.
Cons: An uneven response, 1.9 dB standard deviation from target. Discontinued.
Is the EarAcoustic SPA-Hi End MAX right for you?
Buy it if
- you want the tuning most listeners prefer in blind tests out of the box (Harman score 76).
- you want sub-bass rumble that reaches down to 20 Hz.
Skip it if
- you want to buy it new: it is discontinued.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 1.88 dB standard deviation |
| Driver Type | Hybrid |
| Drivers | 1 x dynamic, 4 x balanced armature |
| Form Factor | In-ear |
| Harman Preference Score | 76 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.4 dB at 30 Hz) |
| Tonal Tilt | -0.06 (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 the median of 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 88 out of 100, up from 76.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -0.9 dB | 0.70 |
| High shelf | 10,000 Hz | +1.7 dB | 0.70 |
| Peak | 23 Hz | +1.6 dB | 1.63 |
| Peak | 174 Hz | -4.6 dB | 0.74 |
| Peak | 4,872 Hz | -1.9 dB | 6.00 |
| Peak | 8,000 Hz | -4.6 dB | 1.76 |
Neutral 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 the median of 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 91 out of 100, up from 44.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -9.4 dB | 0.70 |
| High shelf | 10,000 Hz | +1.7 dB | 0.70 |
| Peak | 174 Hz | -4.6 dB | 0.65 |
| Peak | 744 Hz | +1.3 dB | 2.01 |
| Peak | 4,873 Hz | -1.9 dB | 6.00 |
| Peak | 8,000 Hz | -4.6 dB | 1.77 |
Studio flat 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 the median of 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 92 out of 100, up from 25.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.8 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 171 Hz | -6.4 dB | 0.70 |
| Peak | 784 Hz | +1.2 dB | 2.39 |
| Peak | 2,948 Hz | +2.3 dB | 1.84 |
| Peak | 4,669 Hz | -1.5 dB | 6.00 |
| Peak | 5,385 Hz | -4.0 dB | 2.74 |
| Peak | 7,600 Hz | -3.7 dB | 6.00 |
Warm target
Set a preamp of -1.2 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 91 out of 100, up from 72.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -0.6 dB | 0.70 |
| Peak | 23 Hz | +1.6 dB | 1.86 |
| Peak | 81 Hz | -0.9 dB | 2.17 |
| Peak | 174 Hz | -4.4 dB | 0.76 |
| Peak | 773 Hz | +1.6 dB | 2.16 |
| Peak | 2,427 Hz | -1.2 dB | 4.03 |
| Peak | 3,542 Hz | +1.4 dB | 6.00 |
| Peak | 6,161 Hz | +1.7 dB | 6.00 |
| Peak | 8,000 Hz | -5.6 dB | 0.65 |
Bass target
Set a preamp of -4.6 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 91 out of 100, up from 69.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.9 dB | 0.70 |
| High shelf | 10,000 Hz | +1.7 dB | 0.70 |
| Peak | 23 Hz | +1.8 dB | 1.43 |
| Peak | 174 Hz | -4.6 dB | 0.76 |
| Peak | 4,871 Hz | -1.9 dB | 6.00 |
| Peak | 8,000 Hz | -4.6 dB | 1.76 |
Bright 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 92 out of 100, up from 36.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -9.5 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 23 Hz | +1.2 dB | 2.42 |
| Peak | 76 Hz | -0.9 dB | 2.02 |
| Peak | 174 Hz | -4.6 dB | 0.66 |
| Peak | 741 Hz | +1.3 dB | 2.30 |
| Peak | 2,427 Hz | -0.9 dB | 3.04 |
| Peak | 3,597 Hz | +1.7 dB | 6.00 |
| Peak | 5,345 Hz | +1.2 dB | 0.98 |
| Peak | 7,891 Hz | -2.2 dB | 6.00 |
V-shaped 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 88 out of 100, up from 74.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +3.6 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 174 Hz | -3.3 dB | 0.76 |
| Peak | 3,529 Hz | +1.7 dB | 6.00 |
| Peak | 5,345 Hz | +1.9 dB | 0.88 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the EarAcoustic SPA-Hi End 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 4 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 4 measurements from the squig.link databases of dl, obodio, pw and soundcheck39. Thanks to each of them for publishing their work.