"Patrick"

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.)


** Stick the damn phones on your fat head and connect pairs of wires to a AA
battery until you hear a click.

Now you have your two pairs of wires.

Wire them to a plug any way around you like and connect the same AA to the
common and both positives at the same time.

If the click seems to comes from right inside your head - game over.

If you need more explanation - you do not deserve it.



...... Phil