Bogen's CSD1X2 Ceiling Speaker, a drop-in ceiling speaker, comes with 4-watt multi tap transformer with a rotary switch for power tap selection. Its frequency response ranges from 110Hz to 20kHz. It also features an 8" main cone and a secondary high frequency cone. Its one-piece assembly design makes installation a breeze. Includes a perforated grill, integrated tile support rail and seismic attachment point.