SM820A SERIES: 8" 50WSound masking speaker series SM820A features an 8 inch 50W coaxial driver with 20 oz. magnet. Includes factory wired transformer, 760 cu. in. backbox with grille, SG handibox cover with knockouts, 1 2 in. Romex connector and externally accessible input leads. Black or white housing. Optional factory mounted bridge rails. UL Listed. Model No. Driver Transformer Backbox Grille Mounting Style SM820A 8 in. 50W (8A50) 70V 760 cu. in., black Hangers SM820A