Can someone explain 7.1 surround sound. I know the speaker placement in 6.1, so where would the other speaker go? I'd post my setup, but people would laugh. Decent receiver, but my Bose center channel and rears are 7-8 years old and the fronts are rca bookshelf speakers that came off of a crap radio. AND I have no sub, which blows. But I did get a 24" Toshiba Flat Screen TV for $100