Amazon.com: Gemini Sound ZRX-S18P 18" Inch Woofer Professional DJ PA Systems Active Powered Subwoofers with 1600W Watts Class D Digital Power, 3" Voice Coil, Line/Link in XLR Connectors : Musical Instruments
Amazon.com: SOUND TOWN 18" RAW WOOFER SPEAKER, 400 WATTS PRO AUDIO PA DJ REPLACEMENT SUBWOOFER LOW FREQUENCY DRIVER (STLF-1890) : Musical Instruments
Amazon.com: Eminence Professional Series Impero 18A 18" Pro Audio Subwoofer Speaker, 1200 Watts at 8 Ohms : Musical Instruments
Amazon.com: Sound Town 18" 750W Cast Aluminum Frame Woofer (Low Frequency Driver), Replacement Woofer for PA/DJ Subwoofer Cabinets (STLF-18AS) : Musical Instruments
Amazon.com: Seismic Audio - 18" Raw Subwoofer/Woofer/Speaker - PA DJ Pro Audio Replacement : Musical Instruments
Amazon.com: Seismic Audio - 18" Raw Subwoofer/Woofer/Speaker - PA DJ Pro Audio Replacement : Musical Instruments
Amazon.com: Sound Town 18” 450W Raw Woofer Speaker with 4" Voice Coil, 100 oz Magnet, Replacement Woofer for PA/DJ Subwoofer, 4-ohm (STLF-1804-4) : Everything Else
Amazon.com: Celestion FTR18-4080HDX FTR Series 18-Inch 600-Watt Subwoofer : Electronics