Well, it seems by now that this is a real problem for some, and that it is Pre-amp related. I kinda was hoping everyone had a similar problem, that it was just the way the unit worked, but many must not have such a problem with the "popping" noise. Is it the Pre-amp, or are we doing something different or wrong that others aren't? At first I thought it was because we had separate amps for the rear, or "popping" channel, but now I am not so sure.
Why just some of us and not everyone??? It is an interesting problem....small, not an end of the world type problem, but a little annoying......
hopefully we can figure this one out.....
Back to the drawing board..........