QSC KS118

An even better subwoofer than the KW if you believe that could be possible, the KS118 is a high output active subwoofer producing impressive low frequencies for mobile entertainment, audio production, night clubs, bars and performance venues. The 18-inch direct radiating driver is powered by a 3600 Watt Class D amplifier, the KS118 delivers high SPL with dynamic and musical sound reproduction of very low frequencies. On-board DSP as found in the K.2 series allows users to tweak system performance and gives the ability to array two units in a cardioid arrangement.