In reply to:

Room is 20 x 28. Half for HT, other half for a pool table.

Dam, that's a big should have got the SVS dude....Just kidding. After some recent mods I'm at roughly 24x24 and I can knock stuff off any wall listening to music and you would not tell me to turn the sub down. That is what I like about the SVS. It thumps hard but it doesn't draw attention to itself.