4 pole chassis connector, black D-size flange, countersunk thru holes, 3/16 inch flat tabs
The SpeakON panel mount connectors are the standard chassis connectors for loudspeaker / amplifier interconnections. They feature a unique metal locking system, making contact only once fully locked. The SpeakON receptacles are robust, versatile and easy to terminate.

and Benefits
Current rating 30A rms
Glass reinforced materials make it extremely robust and dependable
Precise keyway for secure mating
Accurate twist lock latching system
Metal insert in locking area
Airtight design - optimized for speaker applications
Branded with unique hologram - guarantees genuine and authentic Neutrik product