I have a stock setup with 2 kicker amps and the kenwood head unit. Ever since I bought my boat last summer I have had a whine coming from the speakers when the engine is running. The source is the head unit and I am sure it is a gtound issue but not sure how to fix it... I trird tracing the HU ground with no success... I dont want to start cutting wires without some guidance lol... Any help is greatly appreciated...