The Reference Series offer is an uncompromising solution addressed to owners of both the most sophisticated and mid-range audio systems, and the cables themselves are distinguished by an excellent value for money. Typical of all Red series cables is that the main conductor is OFC copper with increased cross-section and FEP dielectric. The Reference series is equipped with solid and gold-plated 24-carat gold plugs. Depending on the type and version of the cable, it can be made with an additional anti-interference filter and an antistatic smart couplers