Connectors that are fitted with gold plated contacts have the advantage of preventing oxidation and maintaining performance after years of use.
Another great property of gold is that it is an excellent electrical conductor. For comparison, if pure copper has a relative conductivity of 100 then gold is only 31% lower than copper, while nickel is 76% lower than copper.
These gold-plated connectors can be found in the premade cables of the
Classic and Prime series.