You didn’t read the article about Toole’s room:
The room was configured in 2000, as a 7.1 system. The front wall was deliberately constructed as a low-mid frequency sound scattering surface using display niches and other depth variations (including spaces behind the fabric covered doors) to alleviate the boundary effect for that wall.
He has a purpose built room and the treatments aren’t displayed. If you look at the diagram his speaker layout follows dolby specs just like mine does (see the other thread I started about building an atmos room, LOL)
Good luck with your "critical listening" over at "dry wall studios". Complete waste of time, but you refuse to be "schooled by Toole" which makes you a ......