Since it is the basement I am talking about, do I need to put in a subfloor or can I just use carpet in the room. Will that keep the sub from shaking the house or do I need a floating floor as I have been reading about? The room within a room. I see that using a floating ceiling with I believe it is resilient chanel with two sheets of 5/8 drywall has a stc of 61. That should pretty much take care of any noise going upstairs wouldn't it?

7.1 theater room
60 fronts vp180 center 4 qs8's ep500 sub

3.0 tv room
m3's vp150 center