NES-3000 series speaker cables are made by the state-of-the-art UP-OCC Copper Conductor. These special materials and structure can achieve transparent and dynamic sound that any regular pure copper speaker cable cannot reach. NES-3005 II is consisting of a number of individual conductors. and NES-3005 II has only with 6 individual UP-OCC core copper conductor (13AWG, 2.5 mm2) for better home theater hook up. UP-OCC Tech. Multi-Size Copper & UP-OCC Silver Plated Copper Conductor 6 Core Conductor Group CL3 Rated PVC Insulation Anti-Electrostatic PVC Outer Jacket