I have a carver CT-27 pro-logic pre-amp and AV-405 amp that I have had for years and love. I use them to run my JBL L5's and I have a set of JBL surround and center channel speaker that I have owned also since out of college. As of late I notice that my center channel when I am watching movies does not have any sound. After awhile the sound will come on, but only after the movie has been playing for awhile. I noticed if I try to turn up the center channel volume when playing a movie in 'Movie' surround mode on the pre-amp then the center channel will 'Pop' and the sound will come on.

Can anyone tell me what is happening. Is it that most movies now are encoded in Dolby digital and my pre-amp is a dolby pro logic processor so the sound signals are not correctly being processed?

Thanks,