So I have given this a try and just going to give a little report on what I've experienced.
Equipment: akg k240, ibasso d6
So of course, I've noticed a drop in the highs, which is to be expected. What I also thought I'd expect is a flattening of the sound, namely a reduction in bass and highs. The highs most definitely were tamed, but probably as a psychological counteraction, bass seemed to be boosted despite my reductions in the slight bass peaks. Is this what others have experienced as well? or am I just delirious from listening to too much pink noise and sine waves