Agree with Stanwal. Placement is very important, but acoustic treatments can go a long way to tighten things up. I, too, find that the Cardas formula doesn't give me enough separations and sidewall reinforcement. My room is narrow, 12', so optimal placement is only 3" closer to the sidewall than Cardas formula and that makes a very significant difference. But without bass traps, that placement sounds a bit boomy and muddy. With bass traps, just right.
Cardas Speaker placement..
Once again I'm playing around with speaker placement.After reading some from the cardas site I fiqure I would try this method.After putting my dimension's in the calculator it says 4' from the sitde walls.I went with this but the final set up looks rediculous".The speakers look smashed together.does this seem right in a 14.5' room or did I do something wrong..?My room is 14.5' x 22' x7'.The reason for the change in placement is the bass is never right to me..I tried other speakers in this room with the same results..Thanks