After constantly complaining about the SQ of the Pio BDP, I finally decided to do something about it. I grabbed what Dynamat I had left and applied it to the top cover, bottom piece, and a few small strips for good measure around the optical drive casing. After putting it back together, I immediately noticed that there was obviously more heft to the machine, but more importantly, that the metal all felt more like solid plastic rather than the assortment of flimsy metal sheets it really is. I fired up a few CD's and was actually quite impressed by the change. It used to be when a multitude of instruments/music sources were playing, all detail was lost and it'd become a smeared image of bleh. Well, it still does it more than I'd prefer it to, but the effect has been DRASTICALLY reduced. I can actually focus on any music source and not lose it in a pile of mud.
I know this isn't breaking ground or anything, but I would like to share my experiences in case someone has thought about doing this. The changes I heard weren't subtle. I still want a better source, but the mod might make the BD's sound "livable" while I try to work out a bigger/better improvement in the system.
edit: I will add that I do not know yet if this has any affect on BD video. I expect there to be audible differences, but not sure what it might add otherwise. I do know that the Pangea PC did make a difference visually as well as audibly.