Supra Cables Excalibur USB 2.0 Cable The goal was simple: to make the world's best USB cable, with no compromises or shortcuts. Excalibur is a premium high speed cable with improved data and power transmission, a complement to the existing Supra USB series models. Both the data pair and the power pair are optimised for their purpose, as the demands to transmit data and power are different. The twisted data pair is made of PE insulated Silver-plated Oxygen Free Copper wires. The Silver layer is very thick, 3.8% of the total wire, for best conductivity and high velocity factor. Silver is great for high frequencies and high speed data transmission. The construction of the power conductors are totally different compared to the data pair. To avoid power losses and to maximize the .
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