BMW E46 Convertible Custom built Armrest Bass Box with 8" Car ALPINE Subwoofer | eBay
BavSound Speaker Upgrade - E46 Convertible – Silicon Valley Bimmer
Is this the ULTIMATE subwoofer for the BMW e46?!? - YouTube
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