for unused phono, RCA sockets. Shorting plugs can greatly reduce RF pickup and noise that unused phono inputs add to the noise floor of your hi-fi. Built around a gunmetal finish and gold contact phono plug, using a extremely low noise 5K resistor internally connecting the signal to earth. This resistor acts as a load as you should NEVER have a direct short, you could accidentally destroy your equipment by putting a direct short on the output of some equipment.
Sold in pairs, fully built.