The 'Mach 460' was the original Ford premium optional sound system for the Mustang. I have not modified it at all.
It has a tweeters ~2" dia(top front of the door) and a ~6" speakers (lower fornt of the door). In back, it has large speakers and a powered subwoofer. The amps are mounted under the rear deck.
I don't know the wiring scheme, just the symptoms described.
Thanks
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