Soundmatters foxLO Palm-Sized Powered Subwoofer - US Version (Black) Adds a full octave of clean deep bass, near field down to 30 Hz Patented Magnetic Drive Woofer driven by 30 watts built-in and augmented by 2 passive drivers Connect to Soundmatters foxL via its sub out or to other speakers using foxLO's full-range audio output Audio input with variable Bass Level, switchable limiter, and Power LED Use on the desktop or floor, orient vertically or horizontally