I picked up a "beat up" set of sennheiser headphones (hd201). The phono plug end seemed to have an issue such that most of the time only one ear would work but by compressing / bending the jacket of the phono plug, I could cause the other ear to work. Must be a phono jack (3 pin) problem. So I cut it off and have solder based replacement. BUT... the wiring seems "mysterious" to me. I can't see how this can work or even ever worked. Attached is a picture of the wires (less the phono plug). One sheath has what I believe is two enameled wires while the other has basically copper... just one "wire". One sheath goes to one ear and the other goes to the other ear. How can this work??? I don't believe there is any wiring leaving the ear pieces and traveling thru the head band as the ear piece holders / frame are basically solid plastic.
How does a "wire pair" ever get "completed" at each ear piece?
How does a "wire pair" ever get "completed" at each ear piece?
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