For my Oppo BDP-83 SE which I felt vibrated too much when playing I took some extra sound damping material from a PC build put that and a 5 lb weight on top of the Oppo. I also put some computer hand rest wristpads on the feet of the Oppo. It stopped a lot of the vibrations but for sonic performance improvement I'm not really sure because I implemented a lot of tweaks at one time.
