'4-pole male chassis connector for 30 A rms continuous. D size black flange, countersunk holes, 1/4'' flat tabs (termination e.g. with Faston tab Tyco part # 41829). This connector fully complies with the IEC 62368-1 device standard, due to its component certification to IEC 61984. speakON panel mount connectors are the standard chassis connectors for connections between speakers/amplifiers. They feature a unique metal locking system, which establishes contact only when completely locked. speakON sockets are robust, versatile and easy to terminate.'