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[Random_Stranger]

It never really did that before, can anyone tell me what that means and how I can fix that? If I undo my seat belt, sometimes that breaks it but it comes right back, or if I lower or raise my window.... It's the craziest thing, but I hate hearing it when I accelerate thinking I got a supercharger or something. It's really annoying.

[brento_bot]

The problem could be any number of things, and it comes down to a process of elimination.

Usually the problem is the RCA wires and the Power wire being run next to each other or they get to close to one another

Another problem could be your amps ground. if the amp is not grounded properly you will get the alternator wine. check the ground is in tight, and is grounded to a non-painted part of the car chassis.

On the odd occasion it can be something else in your car is not grounded properly and is affecting your stereo. i have heard a power antenna that is not properly grounded can cause this, or your head unit may not be grounded properly (this happened to me) even though the ground wire is connected properly, it wasn't good enough so i had to run another wire from a screw in the back of the unit to the chassis of the car.

The ground loop isolator should be a LAST RESORT. it does not fix the problem, it hides it, and you lose sound quality. If all else fails, get one but i recommend trying everything else first.