Neutrik 4 pole cable connector with chuck and dark grey bushing.
SPX Series. This second generation of Speakon connectors features a higher current rating for the operation of high power speakers and amplifiers carrying more than 1000 Watts. Only 3 parts, easy to assemble.
Rated current per contact: 40 Amp rms continuous
Rated current per contact: 50 Amp audio signal, duty cycle 50 %
Dielectric strength: 4kV peak
Rated voltage: 250V (Insulation)
Cable O.D: 7 - 14.5mm
Wire Size: 4mm
Wiring: screw type terminals or soldering
Locking device: Quick Lock (latch)