Originally Posted by rthompson10
...center speaker behing the screen- screen is 3" from wall. does it make any sense to do any treatments for sound on front wall- and if yes- what?
Even in this day and age of surround sound, the front soundstage remains critical; that's where your attention will be focused, whether watching a movie or listening to music.
In order for you to hear a seamless soundstage, your brain tries to create phantom imaging between your front speakers. And while your brain is doing that, the last thing you need is surround information coming at you from that same direction, muddying the imaging up front.
With that in mind, I think it's worth putting some absorbtion on the front walls, especially at the reflection points of your surround speakers. Behind the screen, you can only use 3" thick material, so go with rigid fiberglass (OC703 or OC705) and remember to cut around your in-wall centre speaker.