If you reverse the speakers, reverse the amp outputs, reverse all the signal leads and cables and nothing changes it is the room. I once sold a high end system to someone who intended to put it into a room with one speaker next to a glass wall. He had other rooms I suggested he use but he wanted that one. Shortly after installation I got a call saying the speakers were diffferent; I went over and reversed the B&W 801s he was using; he could have done this himself as they were on wheels. The sound stayed the same with the other speaker so it was the room.
