The 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.