The Sigma EF power cord was created for applications that will benefit from the Sigma EF model’s greater flexibility. The Sigma EF model is housed in a more slender and more flexible outer tube. In terms of parts and material quality, the Sigma EF Model power cord is identical to its sibling Sigma NR power cord in every respect except two areas. Sigma EF power cords do not have the NR model’s built-in filter network. Sigma EF model power cords are constructed using a very flexible hollow external tube, making the EF model narrower and extremely flexible so that it can be routed around any tight corner. The Sigma EF offers exceptional performance when used with all electronics and speakers that require either greater flexibility in the body of the power cord and can do without the Sigma NR model’s built-in filter network.
Examples of intended applications would be the Hydra Denali and other components that may not need the Sigma NR’s built-in filter networks for added noise reduction.
General Application recommendations: Hydra Denali power conditioners, Amplifiers, Pre-amplifiers, active speakers etc.
Shunyata Research uses only the highest purity of copper available for the production of its wire products. OFE Alloy 101 or C10100 is the highest grade of copper with a minimum 99.99% purity and a conductivity rating of 101% IACS. OFE stands for oxygen-free electrolytic and supersedes the term OFHC (oxygen-free high conductivity). C10100 is the only grade of copper that comes with a written certification of purity. Certified by ASTM F68 C10100.
Shunyata Research's exclusive VTX™ conductors are made in the shape of virtual tubes. The core of the conductor is completely hollow minimizing skin effects and random eddy currents. They are produced using OFE Alloy-101.
KPIP™ (Kinetic Phase Inversion Process) was developed by Caelin Gabriel after years of research into the underlying causes of various effects such as burn-in, wire directionality and the effects of cryogentic treatment. He discovered that there was an underlying core principle that burn-in and cryogenics only “partially” addressed. Once the governing principle was understood it became possible to create a processing technique and machine that could virtually eliminate the need for burn-in and cryogenic treatment.
Many audiophile grade connectors are made from brass or bronze. While some may get a plating of silver, gold or rhodium, the majority of the current is carried by the contact’s base-metal. CopperCONN® connectors contain pure copper contacts which has a much higher conductivity that brass. The difference in performance is clearly audible.