This post is aimed at Ian and Andrew but others are welcome.

I’m building a combo HT and 2ch listening room. My thinking on the ALFRs is that they need a untreated front wall from behind the speaker to the side wall and untreated side wall from a few feet in front of the speaker to the front wall but I’d like to verify that.

What I like to know is if putting diffusion between them (behind the screen) is Ok.
Same goes for the absorption at the first reflection.

Guess the discussion I want to start is about treating rooms with active LFRs …