Patented BroadBeam Ring™ waveguide technology delivers a consistent dispersion pattern for maximum intelligibility and edge-to-edge coverage. A 12.46inch steel deep can provides additional bass response. One 8.0inch polypropylene woofer and one 1.0inch convex titanium tweeter with FerroFluid cooling mounted to a proprietary cast-aluminum baffle and heat sink. Rapid-installation, blind-mount, fixed-wing mounting mechanism with constant-tension design affixing to ceiling thicknesses ranging from 0.25inch (6.4mm) to 1.91inch (48.5mm). Easy-access five-position selectable tap switch for 25-, 70.7- and 100volt applications with transformer bypass position. Separate tool-free magnetic grille and bezel assembly for ease of install and in-field painting. Steel grille with protective powder-coated finish for lasting durability. Sensitivity of 90.5dB offers high-output capabilities and reduced amplification costs. UL 1480 (UEAY) and 2043 approved. Included accessories: tile bridge, Euroblock connector, conduit plate, support cable, paint mask/installation aid.