2001-2006 BMW E46 M3 CONVERTIBLE HARMAN KARDON SPEAKERS SUB SUBWOOFER | M Parts Worldwide LLC
Wicked C.A.S. > BMW > BMW E46 Convertible 1x10" SUB BOX SUBWOOFER ENCLOSURE
BMW 3 series E46 E93 Convertible 10" sub Twin Ported Vented Bass Box E – SAFE'N'SOUND
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
Ideas of factory looking subwoofer for E46 M3 Convertible - NA M3 Forums