Comments on Profile Post by rlow

That would be for stock HD650.

650 doesn’t take EQ all that well. But if you want to try, I used to do something like this:
Filter 1: LowShelf, 45Hz, Q=1.2, G=+4dB;
Filter 2: Bell, 150Hz, Q=1, G=-3dB.

My specific unit had a peak at 5.5kHz. So I did a Filter 3: Bell, 5.5kHz, Q=2, G=-3dB.

Personally I don't think 650 responds to eq very well. (sr1a is the best regarding this, planars mostly decent, dynamics usually trickier). My own rule of thumb is not to apply any boost below resonance frequency (80-90hz for hd650 as far as I remember).

Much easier way for the life: sell it to me! lol

You could try the oratory1990 EQ settings for the Harman curve: https://github.com/jaakkopasanen/AutoEq/tree/master/results/oratory1990/harman_over-ear_2018/Sennheiser%20HD%20650 . It is what I have been using. The effect is subtle. There is a choice of either 5 or 10 filters.