The Technical Pro SUB1801X 18" Passive Subwoofer System pushes out 2000 watts of peak power. Housed within the built-to-last casing is a 18" Aluminum frame, 3" voice coil, 90 oz. magnet. This equals POWER! The SUB1801X will provide most any venue with the bone shaking thump that you crowd is hungry for! Use the single pole mount, stack it on another speaker or place it on the ground. Use the easy-to-grip handles and position it with ease! The SUB1801X has a built in crossover function with a switchable low pass output.The additional low pass filter can be engaged to control the exact frequency output to another speaker. If you want more bass, engage the low pass filter! It will do just that, let the lows pass through!Technical Pro Subwoofers is designed specifically for club and high-end pro audio users. This subwoofers produce an amazing new level of bone-jarring bass, making this Subwoofers a superior choice for anyone looking for thunderous lows in large venue environments.