KOSS KSC75 MMCX adapter
thingiverse
This is the replacement part for you to put MMCX connector on your KOSS KSC75. You still need to get female connectors to fit this design. You may get them here: https://www.aliexpress.com/item/33035633031.html (I used type B connectors) And you need some M2x3mm screws to assemble the part onto the driver. Or you may just glue them on. *The holes on the headphone back are precisely 2mm. So if you use 2mm scerws they will be too loose. That's why I built a "short pitch" file. The slightly staggered holes make the screw tighter. Or you may just use some method like instant glue or thin pieces of plastic to tighten the holes on the headphone back. Then you can use a "normal pitch" file which has just aligned holes to the headphone back.
With this file you will be able to print KOSS KSC75 MMCX adapter with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on KOSS KSC75 MMCX adapter .