The most common explanation for why a car's clock reset is suddenly is due to the battery.This can occur if the temperature has been frigid, the car hasn't been run for a while, or you've been messing around with the electronics after the engine was turned off.
You probably won't unfortunately. It's a $150 speaker. That means that the chances of having a service manual available are slim. Your best bet is checking the amp chip and the power supply. If anything is obvious you will find it.
Please tell what type of vehicle it is so that you can help you locate the correct ignition wires.
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