The CM600i is a 6.5, two-way, blind-mount in-ceiling speaker design that delivers extended low-end response (52 Hz) and optimal off-axis performance (2 to 10 kHz, independently verified). SoundTube's proprietary BroadBeam waveguide tweeter system delivers consistent high-performance audio across the operating bandwidth. The CM600i speaker design incorporates a low-profile grille, proprietary motor-board and six-position tap switch with transformer bypass position. Mounting hardware is included and features a fast and secure constant-tension, fixed-wing mounting system. Applications Designed for in-ceiling background to foreground SPL applications, the CM600i delivers a broad dispersion pattern and high sensitivity. The CM600i is ideal for nightclubs, bars, fitness centers, hotels, airports, convention centers, casinos, corporate venues, churches and other in-ceiling applications requiring background to foreground SPL. For applications where additional bass is required, SoundTube's CM1001d-T 10 subwoofer provides low-end response down to 41 Hz.