Universal Car Stereo Vented Enclosure Single 12" Alpine R2-W12D4 Type – absoluteusa
Amazon.com: Alpine W10S4 10" 750 Watt Peak 250 Watt RMS 4-Ohm Car Audio Subwoofer Sub : Electronics
Car enclosed subwoofer 12 "30 cm ALPINE SBG-1244BR sound electronics columns 89.8dB subwoofers for cars acoustics auto audio parts components speaker _ - AliExpress Mobile
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Alpine® W Series 10" Bass Subwoofers | Quality Auto Sound | Western United States
ALPINE PWA-S10V 10" VENTED POWERED BUILT-IN AMP ENCLOSURE SUBWOOFER CAR SUB BOX 793276210098 | eBay