Neutrik NL4MPRXX-SB Speakon konektor

4 pole chassis connector, black round G-size flange, countersunk thru holes, 3/16" flat tabs. The speakON panel mount connector is the standard chassis connector for loudspeaker/amplifier interconnections. It features a unique metal locking system, making contact only once fully locked. The speakON receptacle is robust, versatile and easy to terminate.