One 5.25 inch (134 mm) polypropylene woofer with rubber surround and one 0.75 inch (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 magnetic seamless grille for lasting durability. Adaptable to material thicknesses ranging from 0.035 in. (0.9 mm) to 1.6 in. (40.6 mm). UL 1480 and 2043 listed.