I am putting together a Dinner Theater at a winery and need some help with a preamp or decoder. I am technically savvy, but have never before encountered a situation in which each of my speakers had their own amplifier. I am trying to figure out how to decode a 5.1 or 7.2 surround system, but without a "decoder" that also is an amplifier. That is to say, I need a receiver that will put the 5.1 signal to each amplifier, while the receiver itself does not have to do any amplification. I am sure I am mixing my terms, but just need to get steered in the right direction.