Is it possible that you are actually hearing a phase problem? Insure that your speakers are wired correctly, i.e. "red to red", "black to black" on both of your speakers. Also, it is possible that your speakers are mis-wired inside, i.e., one of the drivers is wired out of phase.
I agree with the previous poster that suggested playing a mono source. if you play something in mono and the image is not centered, you definately have a problem.
TIC
I agree with the previous poster that suggested playing a mono source. if you play something in mono and the image is not centered, you definately have a problem.
TIC