You *could*, but using good wall anchors such as toggle bolts should be adequate. The Qs are close enough to the wall and the T bracket has 6 screw holes that you could completely use if wanted.

I believe I used 4 drywall anchors for each surround and I've had no problems with any of my 4 QS8s. If you can get one of the screw holes in the T bracket on a stud, then of course that is better, but I wouldn't think you need to tear your walls up just for bracing.

-Dave

M80s VP150 QS8s EP500s
ravenmanor.com/cinema/