The d&b Audiotechnik Y-SUB is an actively driven cardioid subwoofer powered by a single amplifier channel. This SUB provides the greatest accuracy of low frequency reproduction and reduces the energy dispersed into unwanted areas. The Y-SUB is fitted with three point rigging hardware. It can be flown in a column of purely Y subwoofers, at the top of a Y array or used in a ground stacked setup.