I've been doing some research on soundproofing and figured I'd share it. I can't speak to the effectiveness of soundproofing on the S2K because I'm still waiting for my MYO3, but I'm going to soundproof when I've got the interior ripped apart for my stereo upgrade.

I found the following background paper fairly informative.

http://www.math.ohio-state.edu/~ccunning/m...axima/damp.html

Additionally here are some links for companies selling sound proofing products

http://www.sounddeadeningmaterial.com/home.html

http://www.cascadeaudio.com./

http://www.b-quiet.com/index.html

http://www.dynamat.com/

Well, I hope this helps and wanted to share it.