Chris, nice trick with the mirror. For the reflection on the floor, I guess you just put it in front of the speaker and then start moving it away towards the wall, but how do you proceed for the wall, should I put it behind the main couch? And where do I position myself.
On either the floor or wall, the reflection point will be between you and the speaker. Angle of incidence equals angle of reflection and all that.
You position yourself where you'd be sitting when listening to the speakers. You can turn your head side to side to look for the speaker's reflection. If you're trying to treat multiple locations move about in the seats. It helps if you can stay in the seat while someone else moves the mirror.
