My suggestion would be to make the screen a little smaller, stand the Sonos upright and move your screen wall out far enough to allow for corner bass traps with the Sonos in front of them..If instead of forward firing I keep the sonos like they are and make them fire down, I can put them behind the screen on the corners. But I'm not sure how much this will take away from them with the huge DIY screen in front of part of them. I can leave a 6" or so gap at the bottom of the screen and the floor, so some of the bass could escape through there. I'm also looking at cheap AT screen options. Hmmm....