If you hear a whining sound when you listen to your car stereo, don't assume that your audio system needs to be replaced in the near future. Car speaker whine can often be fixed without replacing any expensive components, such as the head unit. Still, tracking down the source of the problem can be time-consuming and challenging.
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Does the speaker sound terrible or not working at all? Diagnose speakers in your car or truck!
A common cause of speaker whine comes from the vehicle's alternator. If the sound changes in pitch or intensity as the engine speed changes, it is probably some type of engine noise, and interference from the alternator output is a likely source.
The problem is that noise from the generator enters the main unit via the power cables. You can deal with this problem in one of two ways:
In either case, the generator will still generate noise but it won't be able to enter the head unit and make the speakers whine.
