That receiver is a true 6 channel. Understand that the same signal will be sent to both back surround speakers. That being said, try going into the speaker set up and look for an option to activate the second back surround speaker. ...
You want to put some type of absorbing material on the bottom half, maybe halfway up the wall. I'm sure someone will correct me if I'm wrong or expand on this.
Brian
I am currently building a house w/ a dedicated room for my home theater. and while it will have front projection and a screen, thats because it's what I want. I dont feel you can tell someone that their setup isnt a home theater just...