I know this is a really stupid question but is there a rule of thumb for the depth of the speakers in relation to the screen. Every theater we have ever done has placed the speakers around the screen and not behind. I've seen a lot of applications where monitors or bookshelf speakers are set back a little but I was looking to put in-wall speakers directly behind the screen and have the screen mount directly to the sheetrock. Is it possible? I'm mostly concerned with the woofer air movement affecting the screen.