While I was calibrating my speakers, I had to switch the wiring on my VAC center for it to be 'in phase' with my other speakers (test using AVIA signals).  The cables were hooked up correctly, or positvie to positve and negative to negative, so my question is, does this mean either the receiver, the VAC center, or the factory terminated CC cable is wired improperly on the inside?  All my other speakers were fine, and I've never had this occur before, just curious as to it's origin?