Broadly speaking, the further you pull the speakers out from the front wall, the deeper the soundstage. My room is 14'8" x 16'6". Speakers set up on long wall. A full 3' from the back of the cabinet to the wall behind. Excellent depth. If your speakers can do bass, you should still get plenty. Admittedly, sofa is pretty much sandwiched against the opposing wall, but it works better than the conventional short wall setup.