I've been working on the room my surround sound is in. I put 8 two foot square acoustic wall panels (Parts Express pyramids) behind the listening area and 2 each behind the S412s and one behind my center speaker. The results have been good. I am wondering about my side and rear spealers. They are all up against the back wall and the rear speaker is hanging from the ceiling in between the side speakers. I don't know if I should let them couple up to and reflect off the walls or if I would do better isolating them with acoustic panels. Any insight on this would be appreciated -- Thanks