The DB1D is the most powerful active subwoofer Bowers & Wilkins has ever made; its 2000 Watt amplifier provides astonishing reserves of drive and authority while an all-new digital pre-amplifier ensures this awesome muscle is always delivered at optimum levels. It uses two 12- inch Aerofoil cones, identical to those found in the 800 Series Diamond, in a dual balanced configuration for incredible stability. As with all the new DB Series, the flagship DB1D is incredibly simple to configure and use thanks to a dedicated mobile App for both iOS and Android devices. This mobile app incorporate a room EQ system that requires no separate microphone kit.