The SR18S 18” 1600W Professional Powered Subwoofer is designed for real-world working musicians, DJs, events, venues, and beyond. The latest acoustic processing technology, powerful amplification, and versatile configurations deliver incredible sound and unbeatable reliability. Custom Voicing modes and a variable crossover makes optimization for your system easy. Built-Like-A-Tank™ construction features a rugged wood cabinet and tough steel grille that is built to last. A perfect complement to the SRT Series, SRM | V-Class Series or any PA, SR18S not only adds powerful low end, but allows for a massive increase in efficiency and output for your whole system.