Orb Audio: subMINI Subwoofer - 9&rdquo; Cube - Dual High Velocity Ports - 50 Clean Watts Of Class D Power - Adjustable Crossover and LFE Setting - Fast, Accurate Bass Ultra-compact cabinet, only 9" on all sides Custom 6-inch driver and dual port design for deep, snappy bass Great fit for any small stereo or surround sound system. Gold-plated RCA line level input Compatible with wireless adapter for remote installation Auto voltage sensing allows use in any country