Try grounding it at a solid different point, make sure that it's a clean metal surface and first remove the existing ground and make sure it's a clean metal point.
1999 Silver Frost Contour SVT
2690 of 2760 Born 08/13/1999
Sony Mobile ES CDX-C90 Deck
6 1/2 Infinity Kappa Perfect mid & tweet set, 2 12 Infinity Kappa Perfects JBL P.600.1 for Bass, P.180.2 for front stage.
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