Banana Plug

An electrical connector designed to join audio wires such as speaker wires to the binding posts on the back of many power amplifiers or to special jacks known as (surprise) banana jacks. A common configuration of banana plugs is to have two of them molded together and spaced 3/4 of an inch apart, which also happens to be the spacing of the binding post receptacles on the back of power amps. This assembly is commonly called a banana plug, but the more technically correct term is “double-banana plug,” or it is sometimes called a “GR” plug, after the General Radio Corporation, which introduced it many years ago.