Extraneous and unwanted RF/EMI signals are abound (from cell phones, computers, microwave ovens and the like).
The Cardas Audio Noise-Stopper caps are shorting plugs that help you block out this unwanted noise by occupying all of your open inputs on the backs of your components.
This lowers the noise floor and allows your equipment to perform to it's fullest potential.
Attention! Use these caps only in RCA INPUT sockets!