There was me happy as larry playing with my new AVIA dvd, when I noticed something odd in the speaker callibration section. Got all the levels sorted with a meter and then played with the wide band pink noise across mains and center. There was a bit of differance for main and center but supprisingly I could hear a not so suttle differance between my main left and right speakers! Going to have to play some more but any ideas? They are Mission 753 floorstanders, on spikes, on carpet, same distance and angle with no obstructions. They are bi-wired to a Yam DSP-A1 with cabletalk 3. Checked the connections and phase. Suspect one of the five drivers in one might be dead.