Help: Something wrong to my amp???

Try moving the interconnects from one channel to the other and see if the image follows? I don't know if a rack would have that dramatic of an affect on the center image. Did you move the speakers while setting up the rack?

My guess would be the cable, I've had 1 set of ic's and a pair of mit speaker cables that failed in my lifetime, it's the last thing you would suspect. the mit's had a short in the network and caused failure after about 5 minutes of playing and the ic's just stopped transmitting signal.

Are you using balanced cables? If so it is possible that one of the hot leads has a short (most likely at the conector and easy to repair). This way you get some signal--but only half and the soundstage shifts away from the problem cable. Do as no_money suggests, try switching the cable--if the problem shifts to the other side, then it's the cable. I had a balanced set of cables and one of the hot leads was shorted to ground--this was a pretty expensive cable too. I just had to reposition the insulation where it was terminated and it was fine.

Excuse me if I've read this wrongly, but are you saying that the image was center before you sent the CA201 for repair and it is now off-center since the CA201 has been returned..? If this is so, then double-check the CA201. Regards, Richard.