1. Your factory amplifier is bad
If your car comes with a premium audio system from the manufacture, chances are there’s a factory amp in there. You can tell if it says “Bose”, “JBL”, “Mach”, “Monsoon”, “Mark Levison” or another name brand on the dash or door panels. Even still, sometimes you won’t see a name brand anywhere in the car, but you’ll still have a factory amp.
Now, if your speaker is cutting in and out… or if it doesn’t work at all… then you may have a bad channel on your factory amp.
In our store, we’ll run a number of tests to gauge this.
If we find there’s a bad channel in the amp, then we’ll either bypass the amp and replace the car stereo (because the factory stereo won’t work without its amp), or we’ll replace the factory amplifier.
If there’s no factory amp (or if the factory amp is fine) then we’ll just replace the speaker, because that’s what was blown in the first place.