Tennmak Sennheiser HD600/650 Short Cable | Headphone Reviews and Discussion - Head-Fi.org
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 iPhone iPod ipad Apple Devices : Electronics
Is it possible to replace a Sennheiser HD 25 1-II cable with a hd 600/650 cable? | Headphone Reviews and Discussion - Head-Fi.org