Eros is designed and built exclusively by Effect Audio. It is made up of cryo treated UPOCC Pure Copper and UPOCC Pure Silver. The base core used in UPOCC is 7N purity Copper and 5N purity Silver. It has detail instrument separation smooth sounding like silver as well as great soundstage punchy bass and a little bit of laid-back feel like Copper. It perfectly balanced both impact bass and crystal clarity. Great Soundstage and instrument speration makes Eros a perfect upgrade cable.