I have this earpads ordered for my Koss Porta Pro and also successfully reared without damage. A small Phillips screwdriver Watchmaker helps a lot. Best opposite the cable start pulling. It is quite firm about it, but the material is surprisingly tough. If it sits, it adapts relatively low stress and you have saved a whopping 9 euros for comparable Ear pads specifically for Koss. Wen money not interested, ignoring my simple tip and buys the "original pad".
