Is this the ULTIMATE subwoofer for the BMW e46?!? - YouTube
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BMW E46 Convertible Subwoofer Box for Sale in Greenwich, CT - OfferUp
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Wicked C.A.S. > BMW > BMW - E46 10" or 12" Magic Box 2 DR COUPE SUB BOX SUBWOOFER ENCLOSURE
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BMW E46 Convertible Custom Built Sub Bass Box Enclosure for Subwoofers on sale | eBay
BMW E46 Convertible Hertz ESF20.5 8” Car Subwoofer installation in custom box and Hertz HCP2 Amplifier to drive the subwoofer. Really great sounding bass... | By In Car Music | Facebook