Powered by a 1400W digital amplifier, the black 12" Active Flyable Subwoofer from RCF is designed to complement the HDL 6-A speaker system. It features a built-in digital stereo crossover (DSP) with adjustable crossover frequency to connect the HDL 6-A line array module or a satellite. This compact, active sub enclosure is equipped with transparent-to-sound foam backing inside to protect transducers from dust. The heavy-duty front grille is powder coated.