Gonk and other fellows,
In order to boom up the db of the center channel, I make a spliter to contact the center chennel analog outputs from the Sony BDP-S550 and the other dvd player which decode SACD and DVD-A. Only the side channels and the subwoofer are using the inputs and outputs from the Component video switcher. The back channels also using the audio input and output from the switcher. I trim the speaker level at outlaw 990. Not balance exactly, but close to it.
Now I can switch the 7.1 analog outputs between 2 players more easier.
Kwok