4 pole male chassis connector, black metal housing, solder contacts or 1/4“ flat tabs, countersunk thru holes. This connector is fully compliant to the device standard 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.