I have a 2021 AT4 with the kicker speakers built in to my multi pro tailgate. When the volume is down low, I have a hum/buzzing sound coming from the speakers. ( I can also hear it when the volume is up, but the music somewhat drowns it out ). If I pause my music the buzzing goes away after a few seconds. The dealer says this is normal. Claims that is just the amp doing it’s job. Anyone have any experience with these speakers. Thanks in advance!!!