Replace Koss Portapro plug
Today I got back from Hamburg (some pictures from there will follow later or tomorrow :)) and managed to get my new Neutrik plug from the postal office.
First impression: Very very nice plug :)
Second impression: WTF! http://www.musik-produktiv.ch where I ordered the new plug charged me 15!! CHF for paying via CreditCard (that was NOWHERE! mentioned) and another 9 CHF for the shipping. That makes a total of 30 CHF for a little plug which is about half of the headphones cost, but I saw a lot of people getting ripped-off in St. Pauli so nothing new here :(
About the actual replacement job. First thing I burned away the paint isolation of the sound wires. I did it with the torch function of my gas-soldering iron which work very well.

Then I soldered it to the plug. First time I messed up left an right so I had to resolder :( (Actually I realized my soldering skills do really suck so this does probably look very weak to you)

The last step is to put evrything inside the case. Somehow I can't completly close it but the winding should be long enough to keep it together nicely as it is.

Comments
déjà vu! I've done exatly the same with my Porta pros, with what looks like the same brand of replacement plug!
Do you by any chance know of a store in Switzerland, online or not, which sells replacement earmuffs? My are a bit b0rked by now.
Just thought I'd tell you I ordered some new earmuffs from amazon.com. $5 for 3 pairs is nothing but shipping was $40!
Hopefully some European store will act responsible and start selling them at decent prices. :)
I just have the same 3 years old headphones Koss Porta Pro and I found more then one store in Switzerland they deliver the mentioned earmuffs for CHF 7.90 + Porto 10 CHF = 17.90 CHF.
You can order here: http://www.k55.ch
Cheers