This sounds interesting. Can you tell me more about this please? I apologize for my ignorance.
He's talking about building a false wall by building out from the original wall. In some cases, people put actual tower speakers behind the wall and put the screen over it.
In my case, I built out the wall by framing it out of 2x8s and then I built three identical LCR speakers that fit into the openings of the false wall.
Then I covered it with a 120" AT screen.