Passive subwoofer with two 8 inch x 3 inch long throw woofers for use with Focal Dimension Soundbar Speaker System. Benefit from deeper bass, 35Hz and a sixth channel combining Dimension soundbar with Dimension Sub. This subwoofer will increase the power handling of your high-fidelity installation for a true 5.1 experience. Maximum SPL of nearly 105dB. Don"t worry about vibrations affecting your screen. Dimension Sub features 2 elliptical woofers working in opposite directions. Extra-wide and topped with an elegant black glass plate, Dimension Sub becomes a support for your screen when combined with the Dimension Soundbar Speaker System.