18" 1600W PROFESSIONAL POWERED SUBWOOFER
The SR18S 18” 1600W Professional Powered Subwoofer features the latest acoustic processing technology, powerful amplification, and versatile configurations to deliver incredible sound and unbeatable reliability.
 
NO MORE EXCUSES
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 while selectable 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. 
 
TRANSPARENT SYSTEM PROTECTION
Other loudspeakers feature some sort of protection and limiting to help them squeeze a dB or two out of the speaker. This is almost always at the expense of sound quality and is commonly experienced as diminished bass response and the "pumping" sound of the internal limiter having a bad day.

When operating at very high levels (ears beware), the processor-controlled system monitoring analyzes the audio signal and identifies the problem areas, then dynamically applies multi-band compression to those specific frequencies rather than lowering the overall output. This keeps your levels where you want them and maintains the sound quality you expect.