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.Main Features:A True Workhorse for Gigging Professionals:1600W Class-D amplifier is designed for ultra-reliable, consistent performanceCustom high-efficiency transducer ensures maximum punchIncreases efficiency of your full-range loudspeakers by taking care of the low end for the entire systemBuilt-Like-A-Tank to conquer every gig while lightweight for easy loadingFrequency response: 33Hz – 200HzMax SPL: 133 dBCustom Voicing Presets:Flat Natural balance between deep bass and overall outputDeep Emphasizes ultra-low frequencies. Great for dance, rap, and electronic musicPunch Prioritizes highest possible output level. Great for bands and rock musicOptimize for Your System:Variable crossover frequencyPolarity invert switchDefeatable front LEDStereo or mono-summing for single or dual subwoofer deploymentVariable level control (-6dBU to +6dBU)Transparent System Limiting and Protection:Dedicated processing module monitors and protects the amplifier in real timeSound quality and tonal balance is maintained even under heavy limitingInput limiting keeps your source signal in check so if youre sending audio thats a bit too hot, the speaker will cool it downUniversal Power Supply (100-240VAC) with Power Factor Correction for stable operation even with unstable AC powerVersatile I/O:Stereo XLR inputsStereo full-range XLR outputsStereo high-pass XLR outputsVersatile configuration options:Integrated pole cupWeight: 74.5 lb / 33.8 kgDimensions: 23.3 x 23.0 x 27.0 in / 592 x 584 x 686 mm