The QSC KS212C Cardioid Subwoofer is a compact enclosure that combines QSC amplification and DSP technology. Its the first single-box cardioid subwoofer of its kind designed for mobile entertainers and medium-sized performance venues. With a powerful 3600 Watt Class D amplifier and two threaded M20 sockets for connecting a 35 mm speaker pole the KS212C manages low frequencies exceptionally well. It also features comfortable aluminum handles and four rear-mounted casters for easy portability and setup. Enjoy the cleanest and clearest music with this innovative and convenient design.