[Captain Howdy]

No, the stereo uses the dominating power source which would be the alternator
when the engine is running. Yes amplifiers are connected to the battery, as is
the alternator. Your alternator does not use or make AC voltage, the only
place you'll find AC voltage in your car is in your speaker wires.

You're out of your box and you're way off track.............




why would it use the alternator??? You might be talking about the
engine.. but the stereo uses the battery. It uses the alternator
indirectly because the battery get's energy from the alternator.
wow... this is why your amplifiers are connected to the battery, so
they get power from the battery, not the alternator. The alternator
is not a stable power source, the battery is. Otherwise you would be
getting alternating current into your amplifier and resulting in
noise. This is why audio equipment uses DC voltage, not AC voltage
(like your alternator). Don't you know this?