Amazon.com: Skar Audio EVL-18 D4 18" 2500 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: Sound Town 2-Pack 18" 2000 Watts Powered Subwoofers with Speaker Outputs, DJ PA Pro Audio Sub with 4-inch Voice Coil (METIS-18SPW2.1-Pair) : Musical Instruments
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: CELESTION FTR184080FD FTR Series 18-Inch 1000-Watt Subwoofer, Black : Musical Instruments
Amazon.com: Sound Town 18” 800W Cast Aluminum Frame Woofer (Low Frequency Driver), Replacement Woofer for PA/DJ Subwoofer Cabinet (STLF-18200A) : Musical Instruments
Amazon.com: Mr. Dj PRO-SUB18 18-Inch 3500W Maximum Peak Power Subwoofer with Crossover, Satellite Speakers and Pole Mount Socket : Musical Instruments
Amazon.com: Sound Barrier MEGASSUS SBL18XN 3600 Watts Raw 18" Sub woofer Speaker Component Driver with 4 inch Voice Coil and Cast Aluminum Basket Pro Audio PA Cabinets - High Handling Power Heavy