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      08-09-2012, 02:27 AM   #1
rallybull
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Drives: F30 335i w/PPK
Join Date: Jul 2012
Location: USA

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Question Upgrading subwoofer in F30 Base Audio

Any ideas how to add some good thump to the base audio system (US) in the F30?

Also does the stock system come with any frequency crossover system to pass just the lower frequencies to the two 8" subs (located below the seats) and the rest of the frequencies to the other speakers?
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