Newbie question here! I have a US spec 1983 308 here in Australia. The old Alpine stereo powers up but has no sound or output at all and we think that there may be a dead amplifier? Can anyone tell me where to find the amplifier location? Also there are two sections in the door trims that look like speaker grills, can anyone please confirm that there are door speakers in all cars? My car also has two small Alpine speakers mounted just behind the driver and passenger shoulders on the rear bulkhead. Replies much appreciated.