Neutrik NL4MMX SpeakerON Coupler Adapter Lockable 4 pole speakON adapter Changes gender to male when permanently locked on the cable Gender - Male Contacts Bronze (CuSn6), Contact plating 4 m Ag Attention speakON Adaptor is NOT to be used as an AC mains or power supply connector! Links two NL2/4F*s together for cable extension