over-ear · measured on GRAS 43AG

Sennheiser HD 660S2
with its curve, on your Mac

This model runs +10.2 dB hot at 20 kHz. Ekhio applies the measured correction and keeps it on: no file to import, no preset to hunt down.

The correction spans 18.1 dB between its highest and lowest band. The centre line is the target.

Band · Correction · dB

16 Hz +6
20 Hz +6
25 Hz +6
31.5 Hz +6
40 Hz +4.9
50 Hz +3.9
63 Hz +3.2
80 Hz +2.3
100 Hz +0.8
125 Hz -0.6
160 Hz -1.7
200 Hz -2.4
250 Hz -2.3
315 Hz -1.7
400 Hz -1.2
500 Hz -0.9
630 Hz -0.7
800 Hz -0.9
1 kHz -1.2
1.25 kHz -1.7
1.6 kHz -0.5
2 kHz +1.1
2.5 kHz +1.2
3.15 kHz +0.4
4 kHz +1.8
5 kHz -0.6
6.3 kHz +0.6
8 kHz +4.1
10 kHz +4
12.5 kHz +1.6
16 kHz -3.5
20 kHz -10.2

Apply it without leaving the system

Ekhio ships this curve and nine thousand more, by model. You pick your headphones once and it applies to everything your Mac plays — no driver, no extension, no files to import.

Measured by oratory1990, from the public AutoEq database. Ekhio does not alter it: it evaluates it across its 32 bands.