Right now I have my CD/DVD player hooked up via digital coax to my receiver. When playing CDs the receiver detects a ProLogic signal. Right now I have only mains, so I don't see a problem in it, but when I pick up my new surrounds I'm worried the receiver will try to use them. Am I misunderstanding things? If it does try this I'll buy another set of RCAs that will force the receiver into taking 2-channel audio. My only thought is that it IS ProLogic, but not 4.1, but 2.1 or 2.0... Is that correct? Secondly, after getting my surrounds I might want to use them occasionally for "dual mains" (for parties/ambient sound thoughout the loft). Is this possible? Equipment Yamaha 495 Receiver Sony 550d DVD Player Monitor 7's Soon to come: Mini-Monitors (surrounds) CC-370 Finally, which 5 disc changers play CD-Rs?