The new Neutrik STX Series is the next generation of 4 pole Speakon connectors especially designed for amplifier-loudspeaker applications in harsh and demanding environments such as professional touring. The extremely rugged and durable STX Series feature an all metal housing and a built-in gasket providing weatherproof protection to IP54. The 4 pole version is now available as 4 gender system including male cable and female chassis connector. NLT4MX -- 4 Pole Male Cable Connector, Metal Housing, Chuck Type Strain Relief NLT4MX-BAG -- 4 Pole Male Cable Connector, Black-Chrome Metal Housing, Chuck Type Strain Relief NLT4FX -- 4 Pole Female Cable Connector, Nickel Housing, Chuck Type Strain Relief NLT4FX-BAG -- 4 Pole Female Cable Connector, Black-Chrome Metal Housing, Chuck Type Strain Relief