This is an RCA plug for audio use, a virtual ground, made entirely with 1960s Western Electric internal wiring. It has been well-received. The wire used is the same vintage Western Electric wire used for turntable grounding, directly connected to the internal ground without using terminals. Connecting it to unused RCA inputs or outputs of your pre-amp, main amp, etc., will prevent noise from entering through the unused terminals and provide the unique sound of vintage Western Electric. You can enjoy the high-frequency clarity, the depth of the bass, and the high sound resolution, along with the sound of vintage wiring. TS plug versions are also available.