PROFESSIONAL POWERED DUAL 18" SUBWOOFER Up to 137 dB Sound Pressure Level 4400W Class-D Bi-Amplification 30-120 Hz linear frequency response 2 x 18" High Power Woofers The SUB 8008-AS is a double 18” high power active subwoofer for live bands, DJs, Clubs, and Rental Companies. It employs a state-of-the-art transducer featuring a high-power ceramic magnetic circuit with a 4” voice coil. The power amplifier manages extreme currents up to 4400W delivering sound pressure levels up to 137 dB with exceptional headroom. The ultra-fast attack with accurate power handling is managed with high efficiency, producing a very low heat loss for silent and fan-less cooling.