Hi everyone, I had tried to find articles on the net for a 6.1 speaker placement but not a lot of useful information. Hope you guys can help me out here. I have a straight rear wall in a 4m (Width) x 6m (Length) room. Natually, both the rear surrounds will go to each end of the rear wall, so the rear centre will therefore go to the centre of the rear wall. My questions are: (1) I read somewhere that in a 6.1 setup, it is strongly recommended to have the all the rear speakers in an arch. With my straight rear wall, this is not possible. Do I have to place the rear centre higher than both the surround speakers to create this "arch"? I don't have a high ceiling, so having an "arch" seems unlikely, if not much. Do you suggest that I just stick to a 5.1 setup? (2) Does it make any sense to have a 6.1 setup with my room size? (3) I will most probably be buying a Yamaha Receiver that supports 6.1 (RX-v730), does it have the capability to set the distance for the rear centre to the listening position, just like the surround speakers? Thanks in advance for any help or advice!