The AcousticDesign Series of installation loudspeaker products from QSC expands with the new AD-S28Tw surface mount subwoofer system. Designed to supplement audio systems by adding low-frequency extension, the new AD-S28Tw is acoustically matched to the entire AD Series. Rated for 250watts continuous power handling and able to take up to 700watt peaks, the AD-S28Tw is a great complement to any of the ceiling-mount or surface-mount AD Series models.