Amazon.com: Geekria Apollo 5NOCC Upgrade Audio Cable Compatible with Sennheiser HD 820, HD 800S, HD 800 Headphones, Replacement Balanced Headphones Cord for Hi-Res Audiophile, HiFi Headset (10ft/3m) : Electronics
Sennheiser HD 800 S Over-the-Ear Audiophile Reference Headphones Ring Radiator Drivers, Open-Back Earcups, with Balanced Cable Black HD 800 S - Best Buy
SENNHEISER CH800s CH 800 S balanced XLR Cable for HD 800 820 Headphones #505636 | eBay