What causes engine noise in car stereo?
That noise could be coming from your car engine/alternator and indicates that your electrical system might have bad ground, a defective head unit, a defective amplifier, bad RCA cables, improper installation, or a problem in the vehicle’s charging system.
Why is my stereo making a humming noise?
The two main causes of a persistent humming or buzzing are: a bad audio cable connected to the amplifier, or. there is electrical noise being passed through an audio cable into the amplifier.
Why do my speakers have a high pitched noise?
The higher pitched and more irritating ‘buzz’ is typically found emanating from the loudspeakers and is usually caused by a ground loop. The most common cause of hum is the ground loop – fortunately it is also the easiest to solve.