Hifiman HE 1000V2 Cable. HIFIMAN uses only the best cables for its headphones. Crystallized copper and silver wire are designed for a wide frequency range, low signal loss and better focus on the low end, produce incredible quality sound reproduction.
Link to the manufacturer's page:
http://hifiman.com/products/detail/258
Technical information:
- 1.5m cable = 3.5mm connector
- 2m > cable = 6.3mm connector
