Axiom Home Page Forums Thread Like Summary - Active LFRs and room treatment question

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 …

Trevor,
Really like the folded QRD designs. Think I might try a building a folded design using foam/board the way you did. Just have to figure out how to stiffen and support the fold … probably a combo of ply/foam held by standoffs. If I put the screen out 8” I can apparently get some effectiveness down to 125Hz … not sure how he’s calculating that … as he gives a theoretical number of 250Hz.

On the speaker blocking … I’d like to have some space between the screen and the front of the speaker … so no blocking behind. Just need enough space around it.