The KRK KNS Headphone Replacement Cable is designed specifically for the KRK KNS6400 and KNS8400 headphones. Featuring a proprietary locking male connector on one end to plug into the KRK KNS headphones and a 1/8 inch male connector on the other which has the capability to screw on an optional 1/4 inch adapter. These replacement cables are constructed from high quality cable and connectors so there is no audio degradation.