Amazon.com: FAAEAL Balanced Cable Replacement for Hifiman Sundara HE4XX HE-350 HE1000 HE-400i(New Edition) HE560, 2.5mm to Dual 3.5mm Works on M11+, M15, M17 Digital Music Players(2.5mm) : Electronics
Amazon.com: FAAEAL Replacement Cable for Hifiman SUNDARA Ananda,Upgrade Cable for Hifiman HE4XX/HE-400i/HE560/HE-350/HE1000 Headphones 2.5mm/3.5mm/4.4mm to Dual 3.5mm Jack Male Cord 1.45meters/4.7ft (2.5mm Jack) : Electronics
Headphone Cable 3.5mm stereo Male to dual 2.5mm Hifiman HE400S HE-400I HE- 400i | eBay