Sub-woofer Satellite Combination… OM-SUB200 Outdoor Omni Subwoofer Features and Specifications: Now it's easy to enhance the bass of your backyard system! Just plug your current speaker wires into the Omni subwoofer. The built-in crossover will filter the low frequencies and drive the 8" subwoofer, while your main speakers will focus on the mids and highs.