Custom Cable for Sennheiser HD600 Series - Arachne Audio
Sennheiser Connectors for HD600 Series
Amazon.com: Audio Cable Replacement with in-Line Mic and Remote Volume Control - Compatible with Sennheiser HD525 HD545 HD565 HD580 HD600 HD650 Headphone and Compatible with Samsung Galaxy Huawei Android : Electronics
Dekoni Audio Balanced 4.4mm Pentacon Cable for Sennheiser HD600 Series