Quote:
Originally Posted by xDrive50i
BMW uses Harman Kardon. If you select the HIFI Professional system, you will get the Harman Kardon system including Harman Kardon speakers. Logic 7 is a trademark of Harman International Industries.
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+1 Also, the upgraded sound system gives you 600 watts of power versus around 300. A necessity in a larger cabin or when tail gating.
