The NL4MP-UC is 4 pole chassis connector for 40 A rms continuous, 50 A audiosignal duty cycle 50%. Black D-size flange, countersunk thru holes, 1/4" flat tabs (termination e.g. with Faston tab Tyco part # 41829) The NL4MP-UC has rated current per contact of 40 A rms continuous. The speakON panel mount connectors are the standard chassis connectors for loudspeaker / amplifier interconnections. They feature a unique metal locking system, making contact only once fully locked. The speakON receptacles are robust, versatile and easy to terminate.