Audio Connectors - Speakon Connectors 2 Pole - Chassis (receptacle) - Neutrik locking Speakon Loudspeaker connector, 2-Pole, Chassis, D-Style flange. Speakon cable end connectors lock into Speakon Chassis connectors. Note: Speakon 2-pole chassis connector does not intermate with Speakon 4-pole cable end connector. Speakon locking feature reduces significantly the possibility of disconnection. Speakons are great for professional sound reinforcement type applications for PA systems, amplifier to Speaker.