"Patrick" wrote in message
...
I have some vinatge headphones (Sennheiser HD424) and want to attach a new
plug.

Which color wires are the positive ones?

The colors in one of the leads are red & blue and in the other lead black
&
yellow. (No wire is used as screening - there's just two wires in each
lead.)

Hello Patrick.

http://www.sennheiser.com/sennheiser/old_manual.nsf/resources/HD_424_oNr_1082_Sp3.pdf/$File/HD_424_oNr_1082_Sp3.pdf

Left ear: Yellow is + and Black is -
Right ear: Red is + and Blue is -

Kindest regards.



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