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Down4sound PRO-FAB v2 2 12 | 2 12 Sub Box | Dual 12-Inch KERF Port Subwoofer Enclosure Box - Down4Sound Shop
Audioholics Reviews their first DIY Subwoofer, the CSS SDX12 Sealed Kit! | Audioholics Home Theater Forums
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Should I port my subwoofer box? I've got 2 12s under the seat in my truck and with the windows down they hit like they should, with windows up they sound horrible,
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