Not the Radio. \Static is a result of a short. Could be a speaker wire, insulation or bared surface. Connection not good, or even the radio antenna out of phase.
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It the static increases when you rev up, it is likely to be suppression on the alternator. If it doesn't check the antenna connection on the radio. There are other ideas here. The best bet is to go to a car radio / alarm installer.
by noisy do you mean static, squeal on starting the car or what
if it is static it could be a bad aerial
squeal could be electrical interference from starter motor
dealers do not fix radios so you would be better off taking it to a radio shop ( where radios are installed ) for a qualified opinion and diagnosis
if you take it to several and you get the same opinion then get a quote to fix or replace
Here's how to test for a bad diode with nothing more than a decent digital multimeter.
1. Set the meter to read "AC VOLTS" (lowest range).
2. Connect the black "COM" lead probe tip to the battery negative post.
3. Connect the red "VOLTS" lead probe tip to the battery positive post.
4. Run the engine at 1500 rpm.
5. Turn on the a/c and rear defroster.
6. Your meter reading should not exceed 0.09 volts (90 millivolts) AC.
You can replace the diodes in the alternator fairly easily, or just swap in a rebuilt alternator if one is available fairly cheaply for your car.
I GUESS that the speakers are driven by an after market amplifier. An amplifier needs to be connected to a power source that is only on when the radio is on, through a relay.
The fuse might be built into the cable to the lighterand/or radio. It's called "fusable link", this type of fuse looks like a cable. Or another type of fusable link might be in the fuse box under the hood near the firewall.
take out the speaker in question and test it.
a 9v battery is good enough to 'burp' it.
if it makes a scratchy noise when you put power to it then you have a short in the voice coil.
Burping a speaker is just a short power up. Don't hold power to it.
Tap it on and off like a music note measure.
The sound chip may have gone in the stereo, especially if someone has had it on very loud they sometimes blow, otherwise you have 2 speaker wires touching each other, that way you only get static noise, insidee the door they sometimes come free and touch the body
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