Soundtube CM52S-BGM-II-WH - Two-Way 5.25-Inch In-Ceiling Loudspeaker with Short Can (White)The CM52s BGM II is a 5. 25" coaxial two way blind mount in ceiling speaker which delivers true high efficiency and performance across the operating bandwidth. By incorporating a 5. 25" polypropylene driver with a rubber surround and a . 75" silk dome tweeter in a drawn steel shallow backcan (3. 75") with a tuned port, this speaker delivers maximum frequency response (65 Hz 22 kHz, 10 dB) in an integrated enclosure design. Mounting hardware is