Some spakers will benifit from their distance to the corners. i.e.better bass reinforcement. The long wall won't give you this unless you want your speakers 15 ft. appart. Then you would have to be sitting way back. It requires some fiddling to avoid the rear wall bass hump.Just be sitting about 1 ft. from the back wall.
Long v. short
I am trying to set up a new room, but cannot decide which wall sounds better for speaker placement. The room is 12.5 x 21 ft, and I've always used the short wall elsewhere by default. However, the long wall placement sounds different, but I have not yet decided if it is "better". I think I am hearing a wider stage, but it may be influenced by reflections immediately behind the sitting position, which must be against the wall due to the short width of the room. Do any of you have any generalized preferred set up for floor-standers, independent of speaker model and manufacturer?
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