Just changed the pads back. D2000 has way better and clearer subs. That bass dept doesn't change too much with the pads. TH-X00 PH has too much mid-bass for my taste. They sound more boxy to me vs D2000. Sub-bass is better on the D2000 - treble energy too. Mid-bass is way heavier on the Fostex - I'm not a fan. Here's some photos... Denon D2000 undone Denon pads left, Fostex right! Fostex TH-X00 Thanks folks!