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      06-25-2019, 07:46 AM   #29
CrownRoyal79
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Drives: BMW 435i
Join Date: Mar 2019
Location: VA

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In sport mode, there is a specific throttle/load point where the exhaust resonance makes the front-center speaker rattle. If the engine load is just right, the speaker rattle can be very noticeable. If I didn't know better, I would think that they're using the center speaker to generate some of the artificial exhaust sounds inside the cabin.
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