For this reason, a partnership has been established with the Switzerland-based Gotham AG – Europe's leading manufacturer of premium cables – to develop custom sound conductors for the entire portfolio. The results now available have exceeded all expectations. Two product lines have emerged – Premier and Professional. Both leverage the advantages of Gotham's state-of-the-art design and offer absolutely outstanding audio performance, nearly perfect signal transmission, and ultimate reliability. Both cable series deliver fabulous results, but the Premier line additionally offers features such as gold-plated connectors, a four-conductor star-quad construction for strong suppression of electromagnetic interference, and double shielding for enhanced suppression of high-frequency disturbances.