Drop-In Ceiling Speaker. Bogen s CSD1X2 Drop-In Ceiling Speakers are 1ft. X 2ft. speakers that allow for fast and easy installation. Just make one simple cut to the ceiling tile, lay the support rail crossbar (included) across the ceiling grid, and drop the speaker into place. Finely perforated grille over the entire front of speaker. Fully enclosed, industrial grade steel construction. Enclosed Back Can. 8'' main cone with secondary high-frequency cone. 70V/25V, 4-watt transformer (4, 2, 1, 0.5, 0.25 watt) taps; selected by rotary switch. Seismic attachment point. Available in off-white and bright white ( U versions) grille finish. ''VR'' versions have a Recessed Volume Control (front-mounted). Complies with Requirements of UL-2043. Support Rail Crossbar (included).