The SUB1 amp is a compact, self-powered subwoofer designed to extend the frequency range and power bandwidth of Audio Performance full-range loudspeaker systems. With a cut-off frequency of 45Hz, the SUB1 amp is made for applications where the reproduction of sub frequencies is of major importance (music, sound effects). It consists of one long excursion 15-inch cone driver mounted in a heavily braced vented enclosure capable of accomodating up to 725W of power continuously.