Incorporates a SoundTube-specific shallow backcan with an installed depth of 3.5". One 5.25"(134 mm) polypropylene woofer with rubber surround and one 0.75" (19 mm) silk dome tweeter. BroadBeam Ring technology for mid-range clarity and smooth off axis performance. Easy-access six-position tap switch for 25/70.7/100-volt and transformer bypass settings allows for easy ordering, stocking, and installation. Tuned port on baffle for added musicality and bass response down to 65 Hz (-10 dB). Reduced amplification costs and maximum efficiency of 84.5 dB sensitivity, 16 ohm impedance. Incorporates a painted steel grill for lasting durability. Adaptable to material thicknesses ranging from 0.035" (0.9 mm) to 1.6" (40.6 mm). UL 1480 and 2043 listed. Included accessories: Color-coded (orange) tile bridge, UL listed 0.5" conduit clamp, paint shield.