This connector is fully compliant to the device standard IEC 62368-1, due to its component certification according to IEC 61984. 4 pole chassis connector, black D-size flange, countersunk thru holes, 3/16" 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.