The 64 Audio U18S ranks #233 out of 297 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: 64 Audio
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#233 64 Audio U18S: $2,999.00 64 Audio eBay
Pros: Eighteen balanced armature drivers per side deliver a warm, relaxed tuning with bass about 1.6 dB above target and sub-bass within 6 dB of target down to 20 Hz. The upper treble near 10 kHz stays close to neutral, so the top end keeps some air without glare. At 106 dB/mW it plays comfortably loud from a phone. It rates above the 64 Audio Volur from the same maker.
Cons: Across seven hobbyist measurements on squig.link, the 3 to 6 kHz presence region sits about 6 dB below target with a 9 dB dip near 5.8 kHz, so vocals and guitars lose bite and fine detail sounds veiled. The 64 Audio U12t rates higher for about a third less money. Its 8 ohm impedance makes the tuning sensitive to sources with high output impedance.
| Released | Mar 2021 (5 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.78 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 18 x balanced armature (1 tia high + 1 high-mid + 8 mid + 8 low) |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 63 (measured by crinacle, via AutoEQ) |
| Impedance | 8 ohms |
| Sensitivity | 106 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.7 dB at 30 Hz) |
| Tonal Tilt | -0.81 (negative is warmer, positive brighter) |
EQ preset to match the Harman 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 AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -0.2 dB | 0.70 |
| Peak | 3,810 Hz | +5.3 dB | 0.39 |
| Peak | 188 Hz | -2.5 dB | 0.55 |
| Peak | 1,693 Hz | -5.3 dB | 0.92 |
| Peak | 9,264 Hz | +3.3 dB | 2.44 |
| High shelf | 10,000 Hz | -4.7 dB | 0.70 |
| Peak | 6,104 Hz | +2.5 dB | 5.82 |
| Peak | 2,983 Hz | +1.3 dB | 4.04 |
| Peak | 5,102 Hz | -1.7 dB | 6.00 |
| Peak | 2,279 Hz | -1.0 dB | 5.11 |
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