It appears the the rear wall behind the listening postiion is producing a boomy bass. I intially moved my speakers (two hannel stereo) around trying to fix the problem but no matter where I put them, the boomy bass was still there. Finally I realized that if I moved my listen position away from the rear wall behind me, the boomyness dissappeared. So, I moved the couch 2 feet away from the rear wall and it sounds better but some boomyness is still there. I really need to move the couch out an additional 2 more feet but that is not possible. Any ideas on how I can stop this? Thanks.