CAB Ultra 18" inch DVC Dual 2 Ohm (Ultra Series) Car Subwoofer 1500 Watts RMS
STLF-18500A | 18" Cast Aluminum Frame High-Power Raw Woofer Speaker, 1 – Sound Town
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BOA181 - 18 inch Subwoofer 6,000 Watts RMS Dual 1 Ohm Mega Subwoofer
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One unit (not pair) |18 Inch Woofer for Bass Compensation of Open Baffle or Cabinet | W-18 - Lii Song (Lii Audio), unique speaker, amplfier, quality and cost-saving parts for HiFi DIY
DS18 PRO-BX21N.1 21" Neodymium Woofer 6000 Watts 6" 1-Ohm SVC Car stereo pro audio Audio car home system Subwoofers