While I have found several similar questions around this topic, they differ enough from my query that I feel I can ask again :D
I am setting up a 7.1 system. My electronic gear is all THX certified, btw. I have 2 LSI15s in the front, LSIC in the center, 2 LSI9s on the side (I need good surrounds for multi-channel SACD). I have a pair of both the RM7s and the RM8s, and want to know which to use for the rear surrounds (not for music - theater only).
I know what Dolby and THX have to say. My issue is that, while my sofa is just barely far enough from the rear wall to allow for 7.1, the only place I can mount the speakers is about 3 feet to the left and right of the sofa. Thus, the angle of approach is not quite behind the listener. In fact, at this angle, the surround backs could just barely be acceptable for 5.1 side surrounds!
So, I am wondering if mounting the RM8s on the rear, facing the center of the sofa, and with the radiating sides pointing inwards towards the wall, might give me the "rearward" surround effect 7.1 is supposed to deliver. Alternately, I guess I could just use a center speaker directly behind the sofa and go 6.1, but as I already have the RM7s and RM8s...
Thanks in advance for any help.