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Originally Posted by DouglasABaker
If you were driving an E39 I'd say it was the power and sub connection to your subwoofer as well as a digital coax. Since you're in an X5 I'll say I don't know on the big black one, but I'm sticking with digital coax on the little round one.
Doug
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The Digital DSP portion is in relation to the amp - not the radio. The picture is part of a dual diversity antenna system.