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Old 07-21-2006, 09:35 PM   #6
E39 Freak
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Join Date: Mar 2006
Location: montreal
Posts: 62
Thanks Alot, 'I don;t have the DSP, but I had already gone to the bmwtips and they show how to upgrade your speakers, in less I didn;t see it, I don;t think they're are any forums or exact explanations on how to install an after market sub into the 540i. I'm still doing research, if you do find something, please send me the link....Thanks Again
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