Center image on left side and don't know why

what speakers are you using? Have a pair of Martin Logan Quest Z speakers in system currently the Center image is very critical of the exact location of your head when listening if its not exactly centered the imaging is skewed especially the vocals

That's another problem I was thinking of but forgot to mention: Many speakers have a "head-in-a-vice" sweet spot, move your head an inch or more one way or the other and the magic is gone, the soundstage collapses. Such is the problem with the majority of time-phase aligned speakers, the sweet spot is the only sweet spot, sit anywhere else in the room and the sound is just mediocer at best, any other person listening is not getting 1/4 of the magic, although there are a few speakers that can offer a sweet spot as big as a sofa and the music will still be stunning even in a different room entirely....btw, did I mention how much I like Von Schweikerts? :o)

Using a Mono track is a good idea. Even use a test cd that does right, left and center checks. Also, make sure your sitting chair is not angled (toed into one speaker).

Just incase its not in your head.

-Dave

P.S - when you figure it out please let us know.

Well..i had the same problem...unit I noticed the balance control on my intergrated...and to be honest...not all recordings have "dead center" imaging...some more than others...but the recording really dictates soundstage location...that being said...a mono test is a good idea...good luck

get the original test CD 1 from Chesky it has a image test track like described above it will tell you immediately what's right or wrong.