4mm plug | Article about 4mm plug by The Free Dictionary
banana connector (redirected from 4mm plug)
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banana connectorA high-quality plug and socket for speaker cable. The banana plug is pushed into the socket, and the spring-like protrusions on the prong make a snug fit (see cutout on illustration). Five-way binding posts are widely used on high-end audio equipment that can accommodate banana plugs as well as pins, spade lugs and bare wire.