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Re: Alternator wine solutions?
The wining noise occurs when there is a closed ground loop. For instance, my CD changer produce some wining but not the radio. Makes perfect sense, the changer is grounded in the back of the car, where the ground potential isn´t the same as the ICS ground point. The radio is inside the ICS and properly grounded at the same point. Alternator currents through the car body end up in the signal path.
Solution? As simple as the problem! Interrupt the ground loop! The simplest way for the cd changer would be to re-route the ground connection to the same point where the ICS is grounded.
For external sources the same thing would apply. Either use the signal wires as power supply ground (cut the power cord ground) or make sure the power cord is connected to the front 12 volt outlet. I don´t know if it is grounded near the ICS, but it probably isn´t too far away.
Last, never use filter suppressors! They always have a negative impact on the sound performance, and really don´t cure the original problem.
Hope you get it sorted!
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