I've struggling with a problem with my system, and it's been going on for awhile now.
I have a small, dedicated music room that has been (I think) acoustically treated as much as possible.
The problem is that imaging is "off". It's not that one channel is louder than the other, it's more that the right side just does not sound as "balanced" or prominent. It's almost like there's a hole in the imaging at about 25% of the extreme right of the soundstage.
I've tried the usual stuff like speaker positioning, reversing cables, trying different preamps, etc, and the problem persists, which I guess points to the room.