I recently posted about the very large improvement I got with the Tesla powerwall installation. I was then told all I was looking for was "confirmation bias" as though the author was the only one able to distinguish valid improvement to my system. I did play with speaker positioning parallel to wall after seeing the comments on one thread, but I had done that before with no improvements from before after. I only have a few degrees of toe in.
I did contact the manufacturer about positioning and they recommended trying the "tilt" of the speakers. They are dipole, 5' panels, so I tried 2, then 1.5, then 1 degree. At the 1 degree angle, I got new speakers. lyrics plain as day that I hadn't understood clearly before, imaging, and all the rest of improvements we all like to have.