Overview…
NEUTRIK® NA4LJX 4-pin, speakon to 6.3mm mono jack adaptor…
An adaptor which converts a 6.3mm Jack Plug to a 4 Pole Speakon Plug. So, the adaptor has a 6.3mm mono Socket on one end and a Speakon plug on the other. Ideal if you have an old speaker cable fitted with a 6.3mm Jack Plug and you need to convert it for use with a new amplifier that now has a Speakon speaker lead socket.