GLS Audio Speaker Jack Twist Lock 4 Pole Square (Rectangle) - Compatible with Neutrik Speakon NL4MP, NL4MPR, NL4FC, NL4FX, NLT4X, NL4 Series, NL2FC, NL2, Speak-On - 4 PACK Neutrik Speakon Compatible 4 Pack for added savings GLS Audio High Quality Guarantee 2 or 4 pin Compatible Easy Install Countersink Flange