My Denon 2200 has an extremely bad vibration with most SACD and DVD-A discs. There is no vibration with DVD or CD. The vibration gets less and less as the tracks go up, just like yours. It also runs very warm, almost hot to the touch.
Denon DVD-2910 excessive vibration?
I was wondering if it is normal for the Denon 2910 to vibrate with authority? While playing CDs the vibration starts out strong on track 1 and then slowly diminishes with each track to nothing by the time the CD is over. I can't imagine the vibration is good for sound qualty.