Klipsch RW12D 12-inch Reference Subwoofer Frequency Response 24-120Hz +/-3dB Amplifier Power FTC Rated Power - 350 watts continuous @ &lt;2% THD / Dynamic Power - 825 watts Maximum Acoustic Output 116dB @ 30Hz 1/8 space, 1m Drive Components 12 (30.5cm) Cerametallic cone, front-firing woofer Amplifier BASH digital hybrid