18 Inch Powered Subwoofer Bass Cabinet - 800 Watts RMS | Powered 18 Inch Sub Cab | Powered 18 Inch sub woofer | Powered 18 sub | Power | Active 18 Inch Subwoofer – Seismic Audio
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Sundown Audio Xv3 18" inch DVC Dual 1 Ohm (X Series) Car Subwoofer 2000 Watts RMS
Legatia Subwoofers - Hybrid Audio Technologies
STLF-1804-4 | 18" 450W Raw Woofer Replacement Speaker, 4" Voice Coil, 4-Ohm – Sound Town