PSW125 Polk Audio 12" 150 watt Subwoofer adds serious bass punch to your music, movies and video games. Has a 12" driver and high-current 150-watt amp. Auto on/off. Nice, clean detailed lows -- even when you crank up the volume. 16-1/4 W x 16-11/16" H x 20-7/16" D. Retailed new for $350.00.