The Mackie SRM1850 18″ Powered Subwoofer is “Built-Like-A-Tank,” delivering 1600W of intense power paired with a custom high-output woofer for powerful, chest-pounding low end performance. The professional-grade, internally-braced all-wood enclosure provides tour level roadworthiness and is front ported for maximum low-frequency extension and punch. The SRM1850 features stereo XLR inputs, full-range and high-pass outputs plus a variable digital crossover that includes presets for Mackie SRM top boxes. Mackie Smart Protect™ DSP is also in place to protect your investment when things get pushed a little too hard. Get the powerful low end your music demands in a rock solid subwoofer with proven Mackie performance.