Patented BroadBeam™ waveguide technology delivers a consistent dispersion pattern for maximum intelligibility and edge-to-edge coverage. One 6.5inch polypropylene woofer and one 1.0inch convex aluminum tweeter with FerroFluid cooling mounted to a proprietary cast-aluminum motor-board 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 1.69inch (42.9mm). Easy-access six-position selectable tap switch for 25-, 70.7- and 100volt applications with a transformer bypass position. Separate tool-free magnetic grille and bezel assembly with integrated safety cable for ease of install and in-field painting. Steel grille with protective powder-coated finish for lasting durability. Average sensitivity of 88dB offers high-output capabilities and reduced amplification costs. UL 1480 (UEAY) and 2043 approved.