18-inch vented subwoofer with 1,000 watt power module. High acoustic output (135 dB SPL peak) with a frequency range down to 33 Hz (-10 dB). Extensive DSP further enhances and protects performance. Has powerCON Input and Thru connections. Threaded pole receptacle for free-standing applications (on the black model only.) Integrated threaded pole mount supports up to two KLA12 enclosures.