I'll start this off by confessing that I've been considering ordering some more speakers. I wanted to run a second pair of mains off of my ecost Denon AVR 1083/3803. I can't say if I forgot or never knew, but there is no B-side with this receiver. What's up with that, Mr. Denon? So, I go to BB and I notice that they are clearancing out the Yamaha htr-5790, and it has an A/B switch. Should I jump on this before they are gone or is there some trick which will allow me to run a second pair of mains with the Denon?