Neutrik NL4 FC Speakon plug, Current rating 30 A rms continuous, Reliable and robust, easy and fast to assemble, Cable strain relief for 5 - 15 mm cable O.D., Accurate and dependable twist lock latching system "Quick...

Neutrik NL4 FX speakon plug - (new version). 4 Pole, for cable diameter 6-14mm max.

Amphenol SP-4-FN Speaker Connector, 4 Pol, Threaded Connector, Metal Shell

Neutrik NL4 FRX Speakon Connector - new version, right angled.