The Acoustune HS1657CU ranks #289 out of 1476 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Acoustune
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#289 Acoustune HS1657CU: $480 eBay
Pros: A single dynamic IEM in a brass acoustic chamber with a preference score of 77. Bass and midrange stay within about 2 dB of target down to 20 Hz, so it sounds full and natural, and the Pentaconn Ear cable is detachable.
Cons: A 6.3 dB peak near 8.9 kHz beside a 4.7 dB dip near 3.6 kHz makes the treble uneven, so some cymbals stand out while vocal edges recede. It was sold mainly in Japan at about $480, Acoustune does not publish impedance or sensitivity, and the score rests on a single measurement.
Is the Acoustune HS1657CU right for you?
Buy it if
- you want the tuning most listeners prefer in blind tests out of the box (Harman score 77).
- you want sub-bass rumble that reaches down to 20 Hz.
Skip it if
- you want the best value: the higher-rated QCY HT05 MeloBuds ANC costs about $446 less.
| Released | Jul 2020 (6 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.93 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x dynamic (4th gen Myrinx) |
| Form Factor | In-ear |
| Harman Preference Score | 77 (1 squig.link measurement, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.1 dB at 30 Hz) |
| Tonal Tilt | -0.03 (negative is warmer, positive brighter) |
EQ Presets
Harman 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 Harman match with this EQ: 90 out of 100, up from 77.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.1 dB | 0.70 |
| High shelf | 10,000 Hz | -4.6 dB | 0.70 |
| Peak | 139 Hz | -2.9 dB | 1.16 |
| Peak | 435 Hz | +1.8 dB | 2.57 |
| Peak | 2,132 Hz | -2.3 dB | 4.06 |
| Peak | 3,074 Hz | +1.4 dB | 6.00 |
| Peak | 3,654 Hz | +5.8 dB | 3.50 |
| Peak | 5,473 Hz | -3.1 dB | 6.00 |
| Peak | 7,121 Hz | +2.0 dB | 3.48 |
Neutral 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 Neutral match with this EQ: 92 out of 100, up from 45.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -7.4 dB | 0.70 |
| High shelf | 10,000 Hz | -4.6 dB | 0.70 |
| Peak | 128 Hz | -3.0 dB | 0.98 |
| Peak | 217 Hz | -1.0 dB | 3.46 |
| Peak | 434 Hz | +1.8 dB | 2.51 |
| Peak | 2,134 Hz | -2.3 dB | 4.09 |
| Peak | 3,074 Hz | +1.4 dB | 6.00 |
| Peak | 3,654 Hz | +5.8 dB | 3.49 |
| Peak | 5,473 Hz | -3.1 dB | 6.00 |
| Peak | 7,122 Hz | +2.0 dB | 3.48 |
Studio flat target
Set a preamp of -6.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 92 out of 100, up from 28.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.0 dB | 0.70 |
| High shelf | 10,000 Hz | +1.6 dB | 0.70 |
| Peak | 151 Hz | -4.8 dB | 1.00 |
| Peak | 441 Hz | +1.2 dB | 3.05 |
| Peak | 2,000 Hz | -1.1 dB | 5.84 |
| Peak | 3,325 Hz | +6.0 dB | 2.94 |
| Peak | 4,039 Hz | +2.2 dB | 4.89 |
| Peak | 5,498 Hz | -5.5 dB | 6.00 |
| Peak | 7,106 Hz | +2.0 dB | 5.97 |
Warm 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 a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 89 out of 100, up from 73.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.4 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 133 Hz | -2.7 dB | 1.21 |
| Peak | 445 Hz | +1.9 dB | 2.16 |
| Peak | 2,138 Hz | -3.0 dB | 3.37 |
| Peak | 3,135 Hz | +1.4 dB | 6.00 |
| Peak | 3,683 Hz | +4.2 dB | 4.25 |
| Peak | 5,544 Hz | -5.2 dB | 6.00 |
Bass 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 Bass match with this EQ: 91 out of 100, up from 66.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +4.9 dB | 0.70 |
| High shelf | 10,000 Hz | -4.6 dB | 0.70 |
| Peak | 30 Hz | +1.0 dB | 1.38 |
| Peak | 143 Hz | -2.9 dB | 1.24 |
| Peak | 435 Hz | +1.8 dB | 2.59 |
| Peak | 2,132 Hz | -2.3 dB | 4.05 |
| Peak | 3,074 Hz | +1.4 dB | 6.00 |
| Peak | 3,654 Hz | +5.8 dB | 3.50 |
| Peak | 5,473 Hz | -3.1 dB | 6.00 |
| Peak | 7,121 Hz | +2.0 dB | 3.48 |
Bright target
Set a preamp of -6.0 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: 81 out of 100, up from 36.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -7.4 dB | 0.70 |
| High shelf | 10,000 Hz | -1.0 dB | 0.70 |
| Peak | 128 Hz | -3.0 dB | 0.96 |
| Peak | 2,123 Hz | -2.5 dB | 4.04 |
| Peak | 3,848 Hz | +6.0 dB | 2.09 |
V-shaped 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 a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 79 out of 100, up from 67.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.5 dB | 0.70 |
| Peak | 417 Hz | +2.4 dB | 2.96 |
| Peak | 2,081 Hz | -2.0 dB | 2.62 |
| Peak | 3,208 Hz | +1.7 dB | 6.00 |
| Peak | 3,893 Hz | +6.0 dB | 1.78 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the Acoustune HS1657CU 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 kazi. Thanks to them for publishing their work.