Mackie SRM1801 Powered SubwooferThe Mackie SRM1801 Powered Subwoofer effortlessly delivers 1000 watts of room-shaking Class-D power in a lightweight portable design. The 18? woofer delivers superior output and active electronics include a precision crossover and tuning filters, providing amazingly accurate bass response. The robust, solid-wood enclosure is covered with high-durability textured black paint and includes an integrated pole cup that’s a perfect fit for your Mackie SRM450v2. Ideal for small clubs, DJs or any portable sound reinforcement application, the SRM1801 completes a lightweight, easy-to-use Mackie powered system.Features: 1000W of ultra-efficient Class-D Fast Recovery™ amplification Mackie Active electronics provide total system optimization Precision crossover (125Hz) Tuning filters for accurate bass response 18-inch woofer delivers superior output and low- frequency extension Dual XLR inputs for mono or stereo applications Stereo high-pass and full range outputs User-adjustable level and polarity controls Individual power, signal, OL, and thermal protect indicators Pole receptacle for mounting full-range loudspeakers Solid plywood enclosure with high-durability, textured black paint Extremely lightweight and portable (73 lbs / 33.1 kg)