One 5.25" polypropylene woofer and one 1.0" convex titanium tweeter with FerroFluid cooling mounted to a proprietary cast-aluminum baffle and heat sink. Patented BroadBeam waveguide technology delivers a consistent dispersion pattern for maximum intelligibility and edge-to-edge coverage. Rapid-installation, blind-mount, fixed wing mounting mechanism with constant tension design affixing to ceiling thicknesses ranging from 0.25" (6.4mm) to 1.91" (48.5mm). Easy-access six-position selectable tap switch for 25-, 70.7- and 100-volt applications with 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 86.5 dB offers high-output capabilities and reduced amplification costs. UL 1480 (UEAY) and 2043 approved.