How do I stop my alternator from Whineing through my speakers?
Speaker Whine From Alternators
You can deal with the problem in one of two ways: Install a noise filter between the alternator and the battery. Install an inline noise filter in the head unit power cable.
What is a reason for applying a noise filter?
First it stops noise from entering and disrupting the operation of your electrical equipment. Secondly, it stops your electrical equipment from putting EMI/RFI noise onto the power lines. The first is to protect your equipment from malfunction or failure. The second is to protect other electrical equipment.
How do you get rid of alternator whine in radio?
If engine noise is your culprit, you may hear a whining or clicking sound. Its pitch will usually vary with engine speed. If this is the case, you can install an alternator noise filter on the power line between the battery and the alternator to minimize the problem.