For the ultimate in convenience and ease of use, get yourself a powered subwoofer. The power amp, the crossover and the speaker itself are all contained in a single heavy duty cabinet. All you have to do is add the music. Combo jack inputs give you XLR or microphone cable connections and 1/4” patch cable connections in a single jack, saving space and keeping the control panel uncluttered. Use either of these jacks to send signal directly from your DJ mixer or unpowered audio mixer. Less pieces to buy, less cables to keep track of; powered subs make it easy for you to get that big show sound for a small price. Seismic Audio offers Powered Subwoofers and Active Subwoofers for every need and for every budget. From our Top Selling Aftershock-18 Powered Subwoofer to our Premium Magma-118S-PW Powered Subwoofer Cabinet, we have the active subwoofer to provide that deep low end. We offer 10 inch powered subwoofers, 12 Inch Powered Subwoofers, 15 Inch Powered Subwoofers and 18 Inch Powered subwoofers. So, whatever venue you are playing or how low you want the bass to go...we have you covered. Throw in our 30 day guarantee and free shipping and you can see why Seimic Audio is the choice for Powered Subwoofers and Active Subwoofers.