vaizard, you can try adding +7dB to the 55hz and click auto-level (to prevent clipping) and check if you hear any wobble audio effect when you are listening to songs.

if the wobble sound effect appears, reduce the 55hz one level and click auto-level again. repeat until you have found there are no wobble sound effect.

to make it simple, wobble sound effect is the filter sound, when the sound is loud and being 'pushed' to be softer and delayed, creating unpleasant effect.

using edifier MP300+ (also with EIDC), i have no problem with adding +7dB to the 55hz.