PreSonus AIR15s Active Sound-Reinforcement SubwooferIntroducing the PreSonus AIR15s Active Sound Reinforcement Subwoofer Designed to complement any full range PA loudspeaker, and a perfect companion for the PreSonus AIR series, the AIR15s active subwoofer delivers a powerful, clear and accurate low end punch. With its 15 inch low frequency transducer, driven by 1,200 watts (peak) of Class D power, it provides plenty of detailed bottom end, all the way down to 35 Hz. The perfect rugged gigging companion