New to HT, but have been doing some reading about speaker operation. We want to add some rear speaker and subwoofer to our system. I have impression that the rear (surround) speakers are not alive unless signal is encoded, e.g. 5.1 enables all those speakers. Given newbie status, I could be wrong. Since most of our listening is music and cable TV with modest movie watching, can the rear speakers be wired both as "B" and surround, thus they'd be alive all the time ? Same thought regarding subwoofer. Grateful for any advice.