Amazon.com: Sealed 12 Inch Subwoofer Box
https://www.amazon.com/sealed-12-inch-subwoofer-box/s?k=sealed+12+inch+subwoofer+box
WEBAtrend Bbox Single Sealed 12 Inch Subwoofer Enclosure - Car Subwoofer Boxes & Enclosures - Premium Subwoofer Box Improves Audio Quality, Sound & Bass - Red & Black Spring Terminals - Charcoal. Options: 4 sizes. 949. $7100 ($35.50/Item) FREE delivery Thu, Mar 28. Only 11 left in stock - order soon. Small Business. Add to cart.
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