Find those weak spots:
- set q value at 3 (this determines the width of the filter)
- make sure your filter is set to peak
- apply a pre-amp of -12dB (to prevent clipping)
- sweep the 4khz - 20khz range is steps of 1 khz and apply a +12dB gain. So 4khz first; then 5khz, while lowering 4khz back to 0dB; then 6khz, with 5khz back to 0dB etc etc
- you will notice discomfort at 1 of multiple steps; you now have found the weak spot(s) of your headphone!
- now apply a as much -dB as you personally prefer on that frequency until you are satisfied
- now set your pre-amp back to 0
- profit