Sound Deadening Ideas???

[mudshvel]

Anybody know any neat sound insulation tricks?? I already have heavy drapes with bulky furniture in the room. I was thinking about ripping the drywall out, spraying rubber undercoating in the joists, putting in >R19 fiberglass insulation, and then use Accoustiblock mat. I figure I should see at least a 30 dB drop in noise transmission(s).
I am currently running a 600 watt home theater receiver with a 200 watt subwoofer. I am also running a seperate channel that feeds a 1000 watt amp that powers two tactile transducers~pretty neat~. AS you can probably tell, my house rumbles when watching the good movies.

[imported_Ron]

http://www.jm.com/Insulation/Marketing/AcousticCapabilities/index.shtml
http://www.certainteed.com/pro/insulation/pdf/304.pdf

[imported_joed]

Don't rip it out. Install a second layer using resiliant bars.

[imported_gbeichho]

A friend of mine created a double thick wall around his home theater room. He used 2x4s for the framing, but offset every second one, so the wall on each side was independently attached to separate sets of studs. Then he insulated the crap out of it.