The QS8 wall bracket uses four or more screw holes. If you use drywall screws, the resulting hole should very easily repaired with paint and some caulk - just like hole from picture hangers. If you can get lucky and grab a stud in the wall you could get by with less than all screws and resultant holes.

Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire