After running audyssey my left rear speaker is set to +2.0db and the other was set to +1.5. She sitting I. My seat and watching tv, the sound is really lopsided. So, to get it where I think it sounds balanced, I set the right surround to +5.0. NOW it sounds balanced to me. Is this a room acoustics thing? I'm nearly certain that originally the speakers sounded the same when you walked up and looked at them but sitting that is certainly not the case. It's like the one isn't even on.
You may want to get an SPL meter at radio shack so you'll know when they are the same dbls at the main listening position. I used to do my adjusting by what I perceived the speakers to sound the same dbls, then I got the SPL meter. I was a few dbls off on a few speakers.