The 64 Audio A4t ranks #508 out of 865 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: 64 Audio
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#508 64 Audio A4t Discontinued eBay
Pros: Crinacle’s measurement gives it a solid Harman preference score of 69 with a 2.35 dB spread. Its tonal tilt of -0.64 sits close to the target, so the overall balance is neither dark nor bright. It uses 4 x balanced armature with an easy 11 ohm load.
Cons: Discontinued, so it is mainly found used. Its 2.35 dB spread is less even than the best measured sets.
| Released | Nov 2018 (7 years ago) |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.35 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 4 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 20kHz |
| Harman Preference Score | 69 (measured by crinacle, via AutoEQ) |
| Impedance | 11 ohms |
| Sensitivity | 107 dB/mW |
| Tonal Tilt | -0.64 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -4.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -0.6 dB | 0.70 |
| Peak | 9,416 Hz | +6.1 dB | 1.13 |
| Peak | 142 Hz | -2.7 dB | 1.19 |
| Peak | 1,925 Hz | -4.3 dB | 1.71 |
| Peak | 3,241 Hz | +5.0 dB | 2.65 |
| High shelf | 10,000 Hz | -3.6 dB | 0.70 |
| Peak | 506 Hz | +1.1 dB | 0.88 |
| Peak | 240 Hz | -0.7 dB | 1.66 |
| Peak | 1,314 Hz | -1.0 dB | 3.32 |
| Peak | 893 Hz | +0.5 dB | 2.53 |
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