8 pole male chassis connector, metal square black G-size housing, countersunk thru holes, 1/4“ flat tabs This connector is accepted within audio equipment designed according to IEC 62368-1 due to its component certification according to IEC 61984. The speakON STXX Series was especially designed for heavy duty amplifier-loudspeaker applications like professional touring. The extremely rugged and durable STXX Series features an all metal housing.