The V-SUB is an actively driven high performance cardioid subwoofer powered by a single amplifier channel. The V-SUB features integrated rigging equipment, and shares the same acoustical and visual design as the V-GSUB, which is intended for ground stacked applications only. It houses two long excursion neodymium drivers, an 18" driver in a bass-reflex design facing to the front and a 12" driver in a two chamber bandpass design radiating to the rear. The cardioid dispersion pattern resulting from this approach avoids unwanted energy behind the system that reduces the reverberant field at low frequencies and provides the greatest accuracy of low frequency reproduction.