SoundTube CM800i In Ceiling Speaker in White Patented BroadBeam Ring waveguide technology delivers a consistent dispersion pattern for maximum coverage area per speaker. One 8.0 inch polypropylene woofer and one 1.0 inch 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 0.25 inch (6.4 mm) to 1.91 inch (48.5 mm). 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. An average sensitivity of 90 dB offers high-output capabilities and reduced amplification costs. UL 1480 (UEAY) and 2043 approved.