Fixing Sennheiser PX 200-II: red, green, blue, gold wires

I've broken my Sennheiser headphone and wanted to fix it. Here are some tips.

Wires color:

Red: Right signal
Blue: Right ground

Green: Left signal
Copper/Gold: Left ground

Also, you'll need to remove the colored lacquer around each wire before soldering them!

A nice guide to follow:

Have fun!