Since you said "always" you've probably already checked this, but be sure that the sound is supposed to be exactly in the center, such as announcers and newscasters on radio stations. If it's unbalanced, the reason has to be that it's coming in slightly louder from the right. Furnishings different near the left? One speaker less efficient?(switch left and right speakers to see if balance shifts).As to your ears, turn around and listen with your back to the speakers. I'm not familiar with your Rotel, but whatever is causing the imbalance, can it be compensated simply with whatever volume or balance adjustments the Rotel provides?
