Amazon.com: Sound Town 18" 750W Cast Aluminum Frame Woofer (Low Frequency Driver), Replacement Woofer for PA/DJ Subwoofer Cabinets (STLF-18AS) : Electronics
Amazon.com: Sound Town 18” 450W Raw Woofer Speaker with 4" Voice Coil, 100 oz Magnet, Replacement Woofer for PA/DJ Subwoofer, 8-ohm (STLF-1804-8) : Musical Instruments
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Rogue Car Audio Vandal 18 – 1200 WATT 18 inch Subwoofer – Droppin HZ Car Audio