The mirror technique will work if you can MacGyver a way to hold it and move it. If it were me, I'd start approximately half way between ears and front plane of speakers, and then explore a little fore and aft.
Acoustic panels on ceiling
Anyone knows where to place the acoustic panels on ceiling? I am reading conflicting stuff.
I have two 48” by 24” GIK Acoustics 242 panels with ceiling cloud mounting brackets.
I have two 48” by 24” GIK Acoustics 242 panels with ceiling cloud mounting brackets.