DESC: Velodyne's flagship product, the Digital Drive 1812 Signature Edition, is the industry's first two-way, all digital, High Gain Servo controlled subwoofer. It is the most powerful subwoofer ever built. With the Signature 1812 you recreate the power and force of bass you feel in your stomach along with the speed and tightness you get from the snap of a kick drum. This benchmark in subwoofer technology is also the first to incorporate Velodynes patent pending Digital Drive room analysis and correction system.