Ok let me ask a question also about the radio my 73 D/S has a factory am radio but also a factory rear speaker were there different radios? My fender tag says R11. Just curious on the impedance thing.
The difference is that the output goes to a fader control and it's engineered to keep a 8 ohms impedance on the output transistor. By the way I used to repair car radios and I would find a lot of fried output transistors.
