Originally Posted by TrevorM
If you measure the phase response of a speaker or subwoofer you will find placing them away from room boundries leaves the signal intact. Phase plots cycle correctly. Pushing them into corners or against boundaries has the effect of removing phase coherence. Phase plots have incomplete cycles and polarity jumps all over..
Alan also mentioned that years ago when I ask about pushing a sub up against a wall. Want at least a foot behind it if not two. But you do the best you can with the space you got … sometimes it’s just not practical.