Automatic Overload Protection Circuit Curved sidewall construction cabinetry with attractive black on black woodgrain vinyl 1/4-20 Threaded Insert Allows for Pivot Bracket Mounting Keyhole Bracket Enables Flush Wall Mounting Butyl Rubber Surround Provides Excellent Cone Control and Exceptional Durability Gold plated binding posts for a high quality and secure connection Video shielded to allow placement near TV without interference The Sonic FitTM Collection is ideal for existing construction, Retro-fit and MDU (multi-dwelling unit) markets. These superb ?in-cabinet? speakers are designed to be positioned discretely within any listening environment.