This may be a silly question because I've never used a SPL meter but I was using the AVIA DVD to calibrate my M60s the other day and noticed that the left speaker seemed to always be 1 db lower than the right. I was sitting directly between the speakers about 8 feet in front of them. I adjusted the amp and balanced them with no problem. Is this normal? I checked the cables and everything to make sure all the connections were good. I wondered if the positioning of the speakers could cause this too. One speaker (the louder one) is closer to the corner (about 3 feet away) and the other one is along a straight way.