For this reason, a partnership was formed with Swiss-based Gotham AG - Europe's leading manufacturer of premium cables - to develop proprietary sound conductors for the entire portfolio. The results have exceeded all expectations and have resulted in 2 product lines - Premier and Professional. Both take advantage of state-of-the-art Gotham construction to deliver absolutely outstanding audio performance, near-perfect signal transmission and ultimate reliability. Both cable lines deliver fabulous results, but the Premier line also offers additional features such as gold-plated mating contacts, four-wire Starquad construction for strong Electromagnetic Interference (EMI) suppression, and double Reussen shielding for increased Radio Frequency Interference (RFI) suppression.