hum when motor on, on rear speaker

Hola is already wideda,

So every time I turn on my engine then the rear speakers hum in the long run you get on your ears.

Question: Can this be due to the spark plugs or is enough a fault filter

Have an amplifier over chinch drufff with subwoofer and the rear 2 speakers also on the amplifier.

Greetings and thanks

Musti

from the southern south