I have two smaller Pioneer speakers I use for surround purposes, and due to room limitations they are placed about 80 degrees from the screen, so I sit behind both speakers. This means the surround effect is lost to a degree. I tried to drag the sofa into the centre of the room, and the change was enourmous! Unfortunately the room can't have a sofa plonked in the middle, and there is nowhere else to put the speakers, unless they are directly left and right of the sofa, and I guess this would feel a little too close for comfort. How can I improve the soundstage? They are small speakers and I have the levels for them at about +8db compared to the Missions I use for LR and C. I've been experimenting with angling them behind the sofa but had little effect. Am I looking at an upgrade?