I have a 2.35m unit under my TV, 65cm tall, and sit 3m away from wall, and still there was a difference moving the speakers to stands just to the sides, the left/right effects sounded better and didn't really hurt the phantom center effect. Currently I'm trying it with a equilateral triangle and by-the-book toe-in, and while I don't know if it's really optimal for my space, it sounds great.