"What is the rationale behind facing the subs toward the wall?"
Boundary (driver-wall) reinforcement is increased, thus more bass.
Subwoofer question
I read in an older thread in which someone was describing how a "swarm" sub system was being installed, that the individual subs were placed close to the wall and facing the wall. This last part triggered my question which is:
What is the rationale behind facing the subs toward the wall?
Many thanks, Fred