SoundTube - CM600i 6.5" Coaxial In-Ceiling Speaker (Single) The CMi Series In-Ceiling Speakers are known for their quality of sound they produce. SoundTube’s CMi series incorporates BroadBeam full-frequency dispersion technology and fixed-wing installation features for any type of hanging-tile or sheet rock application. BroadBeam waveguide technology delivers a consistent dispersion pattern for maximum intelligibility and edge-to-edge coverage. One 6.5 inch polypropylene woofer and one 1.0 inch convex aluminum tweeter with FerroFluid cooling mounted to a proprietary cast-aluminum motor-board and heat sink. Rapid-installation, easy mount, fixed-wing mounting mechanism with constant-tension design affixing to ceiling thicknesses ranging from 0.25 inch (6.4 mm) to 1.69 inch (42.9 mm). Easy-access six-position selectable tap switch for 25-, 70.7- and 100-volt 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. The CM600i also features a steel grille with protective powder-coated finish for lasting durability. An average sensitivity of 88 dB offers high-output capabilities and reduced amplification costs. UL 1480 (UEAY) and 2043 approved. Included accessories: Tile bridge, Euroblock connector, paint mask, conduit plate.