The other way to do it is to acquire a decent passive RCA/line level switch box. I have one made by DB Audio; it has five stereo RCA inputs and one stereo RCA output. Plug the stereo preamp out from your good preamp into it and the front main out from the home theatre processor.
You are..to use a very old expression..."in like flint"
carl
You are..to use a very old expression..."in like flint"
carl