Atrend 12" Single Sealed Shallow-Mount 5.5 Inch Height Subwoofer Truck Box Charcoal 12PST - Best Buy
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2) Rockville W12T4S4 12" Shallow Mount 1400w Subwoofers+Sealed Sub Box Enclosure - Walmart.com
Sundown Audio - SLD-12 Shallow Mount 12" Subwoofer Dual 2 Ohm (Open Box) - Alternator Outlet | Mechman High Output Alternators Authorized Dealer. Fast Ship Times, Made in the USA!