BMW Z3 ROADSTER Rear Subwoofer Speaker and Box Harman Kardon 96-99 OEM | eBay
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BMW Z3 Model 81S Subwoofer - Integral Audio
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20130209 BMW Z3 Sub Woofer Speaker Repair | The most difficu… | Flickr
Factory Auto Sound / FAS Group - Custom subwoofer enclosure for a BMW Z3 Roadster. 8" Hertz Energy woofer. 6.5" Hertz Energy components and a 5 Channel Hertz amplifier as the power