Audio Connector Pin-Outs

XLR Pin 1 (X) Pin 2 (L) Pin 3 (R)
Balanced Screen +/Hot/In phase -/Cold/Out of phase
Unbalanced Screen Signal Screen
Stereo Screen Left Right

NOTE: Although modern equipment follows this standard, the old USA standard reversed the phase between pins 2 and 3. Some older equipment, including some UK and European models, may be wired this way.


Jack Sleeve Tip Ring
Balanced Screen +/Hot/In phase -/Cold/Out of Phase
Unbalanced Screen Signal Screen
Stereo Screen Left Right
Insert Screen Send Return

5 Pin Din Pin 1 Pin 2 Pin 3 Pin 4 Pin 5
Midi Screen Signal Signal
180° Audio Load Left Return/Screen Source Left  Load Right Source Right

Neutrik
Speakon
1- 1+ 2- 2+ 3- 3+ 4- 4+
NL4
Full Range
-/Cold +/Hot/Signal X X N/A N/A N/A N/A
NL4
Bi-Amp
LF
-/Cold
LF
+/Hot/Signal
HF
-/Cold
HF
+/Hot/Signal
N/A N/A N/A N/A
NL8
Bi-Amp
LF
-/Cold
LF
+/Hot/Signal
X X X X HF
-/Cold
HF
+/Hot/Signal
NL8
Tri-Amp
LF
-/Cold
LF
+/Hot/Signal
X X Mid
-/Cold 
Mid
+/Hot/Signal
HF
-/Cold
HF
+/Hot/Signal
NL 8
Quad-Amp
LF
-/Cold
LF
+/Hot/Signal
Low Mid
-/Cold 
Low Mid
+/Hot/Signal
Mid
-/Cold 
Mid
+/Hot/Signal
HF
-/Cold
HF
+/Hot/Signal
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