Sundown Audio Ev4 12" inch DVC Dual 4 Ohm (E Series) Car Subwoofer 500 Watts RMS
Seismic Audio - Apex-10S - Powered Column Array PA System - 700 Watts - 10" Sub & 2 Satellite Speakers, Bluetooth,& DSP - Walmart.com
Woofers : Apex Industries : Woofers, Speakers, Tweeters, DJ Speakers, PA Speakers, Car Woofers, Car Sub-Woofers, Car Speakers, Car Tweeters, TV Speakers
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Amazon.com: Seismic Audio - Apex-12D - Column Line Array Speaker System - 1600 Watt 12" Active Subwoofer and 4x4 Column Speakers : Musical Instruments