The Airmotiv S8 Flex Subwoofer is an exceptionally capable compact powered subwoofer that features a heavy-duty 8” downward-firing woofer coupled to a forward-firing passive radiator — driven by an efficient, cool-running 200 watt Class D amplifier. The Airmotiv S8 Subwoofer delivers plenty of clean low bass to add authority to the lowest octaves of your favorite music, with enough raw power to shake the floor when a movie soundtrack calls for it.