Alpine Retrofit Kit Drivers Sub Problem
hello, basically i recently have had the alpine audio upgrade installed in My E90 built in august 2009. Everything sounded ok till the drivers subwoofer made a horrible rattle at certain frequencies. (there are apparently 3 types of base and it is one of those that initiates rattling). After doing some research I found that possibly the sub is damaged and will need replacing but even after this install the rattle still occurs, so i was wondering if anyone knew what else could be causing the rattle. Thanks
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