The large rectangle along the left wall downstairs is the viewing area (2 chairs); smaller boxes above and below that area are the rear surrounds. TV, center and 2 fronts are the boxes in front of the viewing area, backed up against the wall that it shares with the staircase running upstairs. Suggestions on where to put the PB-10? The wall behind the viewing area is a shared wall with the stairwell from next door. It's the only shared wall.