GLS Audio 4 pole chassis connector, black D-size flange, countersunk thru holes, 3/16" flat tabs.

TECHNICAL DATA

Electrical
Rated current/contact: 30 A rms continous,
40 A rms 1 min.
Dielectric strength: 4kV peak
Rated voltage: 250 V ac
Contact resistance: = 3 m (= 10 m for NL4MD-H) after 5000 insertion-withdrawal operations
Insulation resistance - initial: > 2 G
- after damp heat test: > 1 G
Inrush/outrush current capability (12 V source): 300/30 A/200 ms
Creepage distance: according to IEC 664-1

Mechanical
- Chassis: flat tabs for FASTON 0.187" x 0.02" (4.8 mm x 0.5 mm) Solderability complies with IEC 68-2-20

Materials
Contacts:
Female: CuZn39Pb3
Male: CuSn8, 4 µm Ag plated
Housing: PA 6 30% GR
Metal insert: Ck67
Temperature range: -30°C to +80°C
Flammability: UL94HB

WIRING

Amplifier
Stereo ("HIFI"): one NL4MP socket left channel tabs 1+/1- right channel tabs 2+/2-
Power ("PA) Standard: three NL4MP sockets "A" socket: left channel tabs 1+/1- "B" socket: right channel tabs 1+/1-
Bridged mono: "M" socket: left channel tabs 1+/1- right channel tabs 2+/2-
BI-Amp: one NL4MP socket low frequency tabs 1+/1- high frequency tabs 2+/2-

Cable
Stereo ("HIFI"): NL4FC on amplifier end, four conductor cable splits into two pairs with NL4FC on each end
Power ("PA) Standard: a two-conductor cable for each channel with NL4FC on both ends
Bridged mono: a special two-conductor cable, on both ends wired to pin 1+/2+ of NL4FC
BI-Amp: a four-conductor cable on both ends wired to pins 1+/1-, 2+/2- of NL4FC

Speaker
Stereo ("HIFI"): one NL4MP per speaker left speaker pins 1+/1- right speaker pins 2+/2-
Power ("PA) Standard: NL4MP pin 1+ to speaker coil "+" NL4MP pins 1- and 2+ to speaker coil "-"
Bridged mono: NL4MP pin 1+ to speaker coil "+" NL4MP pins 1- and 2+ to speaker coil "-"
BI-Amp: one NL4MP socket low frequency pins 1+/1- high frequency pins 2+/2-