The Sub III is an active powered subwoofer in a band pass configuration. The perfect addition to the Warwick Combo Amps that delivers the perfect "fat bottom" sounds to compliment any Warwick amp. When stood up on end it's footprint matches that of the W-CL Combo Amp. When laid down on it's side the footprint is the same as the 410, 411 and 115 Warwick Cabinet Enclosures.