Thanks, I am surprised that you thought the bass had less quantity though? The reason I am loving the new sound is because of the extra bass impact. I've went back to my 650's now following a crazy fling with the d2000's... because my 650's now sound exciting!
Ive had a few more experiments with dampening the driver and changing the ear cup material. What Ive settled with now and what seems to be better (a little more refined) is leaving nothing on the driver (everything I tried dulled the bass) and using a dense fabric (from my sock!) in the ear cups. This has kept the new dynamic impact from the free driver, but the denser material smoothed out the overall presentation more than the foam did.
I can now relax and enjoy the music.... with one sock on ha ha