HomeQSC KW181 Sub Woofer 1000-watt powered subwoofer (2 x 500-watt Class D amplifiers)Frequency Response (minus 6 dB) : 40 Hz to 112 Hz18-inch wooferK Series performance in a lightweight, birch designClass D power moduleExtensive DSP QSC KW181 - Sub WooferContact Us to Purchase