Writing this as I plow leftover turkey down. So good.

Shred was a bad description, more like muffled rumble like you said. But the really low stuff at reference still cuts through more than enough to get people too lazy to walk a flight of stairs curious.... HT goodness is just lost on some people. One visitor sat with hands clamped on her ears fearing the worst till I reminded her she could turn it down as she sat next to the remote. (The system wasn't even powered on yet. Lol.)

I'm trying to figure out just how much more it would have taken to dull down the sub 20hz bass to match the rest of the transmission loss. The only way I can figure it is to frame an entirely seperate structure within the basement and have it sitting on a neoprene gasket. Then do the typical dd/gg/clips and track with r19 roxul on the floating structure and drywall mount device boxes with putty pads. Then you'd have to insulate the neighboring structure as well with additional drywall in the joist cavities. Some guys go that far I guess. confused

Interesting food for thought, literally. Still eating. grin