This cable comes with the Furutech FI-11 Rhodium connectors. The Nanotec #308 "Wonderful" Power Cable replaces the #306 model. The #308 looks exactly the same as the #306, but it uses the new version of Japanese Continuous Crystal Copper, referred to as Lined Array Copper (the jacket color is deep violet). If you know audiophile cables you've heard of Ohno PCOCC copper, this is the next generation copper, which yields a smoother and more focused/detailed sound than the older version.
The #308 uses 105 strands of copper in each of the three conductors, so it's an excellent choice for extreme high-current applications, even on a 20A circuit.