Threads on the Dynamat mods, pictures, and some analysis of the impact on sound:
Enjoy! Seems to be the real deal, btw.
i read about a "sock mod" where as you cut off the top elastic part of a dress sock, and wrap it around the pads. i tried it last night and was amazed by the results on my 325s. the bass is now deep, and firm. so much that i had to turn down the bass on my denon receiver..i was only doing this to make the pads more comfortable, didn't think it would have changed the sound...i think that the added material around the pads help contain the sound, and move the pads slightly away from my head. while i loved my 325s i did miss the lack of bass, but not any more. they sound like a different set of cans.