Gday, I have a 57 pushbutton radio but require a speaker for the dash with the transformer. Can anyone tell me what the voltage of the input and output for the transformer is to the speaker. Otherwise can anyone tell me where I can get a speaker for this radio and have it shipped to Australia... Thanks

There is a 57 chevy speaker for sale in this form under parts for sale, page 2. It gives all the information on the speaker. this is not original, but a replacement speaker.