'67 Camaro Factory Rear Speaker pic???

[Mark_C]

Wouldn't have multiplex controls in a 67.

In 68 (and 69) a multiplex AM/FM with an 8 track used a different model 8 track that took the output from the multiplexor and passed it thru the 8 track player and then out to the speakers, instead of sending the signals back to the radio. This setup used the 4 knobs on the 8 track to control the tome, balance and fade features of the multiplex. The flush mounted knobs in the console compartment cover were used with the AM/FM multiplex alone.