The speakers extend along the walls about 22' or so. However, due to the 'home plate' shape the part not touching the walls comes out aout 32 1/2". As I understand it, it is preferable to have a wall extend beyond the actual point of contact. With that said, I have one such wall, but the other is interrupted by a window a foot or two from the 22' extension. In the course of fiddling with my system, I have switched output sides a few times; haven't noticed any difference between the two sides. Just one comment re: the Lascalas. I liked the sound, but the stock Khorns have far superior bass.