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It depends how particular you are. I'm not an audiophile. I upgraded my speakers and added a subwoofer with amp from BSW many years ago. It was a significant improvement and I feel it was well worth the expense. About a year ago I replaced my factory unit with an Android based unit. The sound is another leap forward and was all I wanted to spend.
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 X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
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