The heat resulting from the resistance of the metals locally liquefies the conductor and the plug, creating a single material alloy where the two meet. An ideal connection that puts any solder to shame. Viper's thickly silver-plated RCA plugs use a patented design that eliminates the distortion caused by the extra contact inside most plugs. Because the ground shells are stamped instead of machined, the metal can be chosen for low distortion instead of for its machinability. Viper's RCA and XLR connectors have silver thickly plated directly over the plug parts, without the intermediary nickel layer common to almost all other plugs.
Silver plating provides the best possible connection, regardless of plating on the equipment jacks.
A combination of these major ingredients, and many more subtle details add up to explain how Viper can sound so pure and powerful.