So I plugged this hd700 into the standard pulse and even after eq I was underwhelmed. These have the Anax mod and I didn't know it. I tried to eq the bass to thump and failed. Then! I plugged it into my affordable pioneer sa-6500 and viola. Even with the mod and the treble knob all the way down on these things there are still harsh moments. What the freak?! But otherwise they sound great and the bass is lovely.
Haha, maybe it's just a placebo with your Vintage love
Glad you found something that helps them. I had some old foam discs from my AKG K240 laying around since I did a pad replacement. I haven't had much time to play around, but it gives them a small step to the HD650 side of things (bit muddier bass, bit of edge off the treble). Figure with as many headphones as you roll, you might have some around (or even felt might be a start).
Sorry for being vague before. I didn't want to say "oh these are awful" and make you be biased before you got them.