Ideas of factory looking subwoofer for E46 M3 Convertible - NA M3 Forums
Bimmerforums - The Ultimate BMW Forum
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
Basser - FBbmw05 BMW 3 E46 Cabrio Fit-Box subwoofer enclosure
Wicked C.A.S. > BMW > BMW - E46 10" or 12" Magic Box 2 DR COUPE SUB BOX SUBWOOFER ENCLOSURE