No matter how perfect an AC power source, distortion is added within any cable carrying AC, especially within any stranded cable. Even the most sophisticated power supplies and filters cannot completely eliminate these upstream irregularities.
THE SOLUTION: NRG-1.5EU uses solid Perfect-Surface Copper (PSC) conductors in a Quad-Helix configuration. Solid conductors prevent strand interaction, which is the greatest single source of distortion in an audio cable or in an AC power cable. The nearly perfect surface finish and interior grain structure of PSC copper dramatically reduce distortion compared to OFHC or other metals. The Quad-Helix spiral creates a fixed low-inductance relationship between conductors.
NRG-1.5EUs two RF Stoppers filter Radio Frequency Interference in both directions. They reduce outside interference entering the equipment, and they prevent equipment generated interference (as from all digital equipment and tuners) from reaching other equipment in the system.