Soundtube CM400I-WH - Two-Way 4-Inch In-Ceiling Loudspeaker (White)The CM400i is a 4, two way, blind mount in ceiling speaker that delivers effective low end response (75 Hz, 10 dB) and optimal off axis performance (2 10 kHz, independently verified). The CM400i speaker design incorporates a low profile grille and five position tap switch with a transformer bypass position. Mounting hardware is included and features a fast and secure constant tension fixed wing mounting system. Features: One 4" (102 mm) polypropylene