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  1. e36 Convertible Ski Pass Infinite Baffle help

    General Car Audio Discussion
    So I'd like to add a subwoofer to my car (1995 BMW 318i Convertible), but I don't want to just stick a box in my trunk. I've seen posts about IB/open-air setups by mounting a square woofer to the ski pass which seems interesting, but I'm not to good with this stuff and I'm not sure where to...