8-pole male chassis connector, size G square metal housing, countersunk through holes, 1/4 inch flat tabs. This connector is accepted in audio equipment designed to IEC 62368-1 due to its component certification according to IEC 61984.The speakON STXX series was specially designed for heavy-duty speaker-amplifier applications such as professional touring. The extremely strong and durable STXX series features an all-metal housing.