ProX T-SM32 Adjustable Wall Mount Hinged Bracket for PA Speaker Installations (Black Finish)ProX T SM32 Adjustable Wall Mount Hinged Bracket for PA Speaker Installations Black Finish. This bracket is meant for permanent installations which allow the speaker to sit 12" from the wall to speaker mount allowing access to the rear of the speaker Supports up to 70 lbs. For mounting on flat surfaces only, drywall requires additional mounting hardware, it can be mounted to concrete or brick. The bracket can be set into two positions, up or down 45