I'm running pretty much the best of cables and equipment.
I'll try chassi grounding the headunit power supply first. This should get ride of any ground loops in the system.
Let you all know what happens.
Of couse there is now whine when just running off the battery. Very annoying.
My headunit has 8V preouts, there shouldn't be anynoise in the lines.
Oh well, if it was easy everyone would do it.
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