XLR Pin 1 Pin 2 Pin 3 Balanced Screen +/ Hot/In phase - /Cold/Out of phase Unbalanced Screen Link to Pin 2   Link to Pin 1 Signal   BALANCED XLR NOTE! Either pin 2 or pin 3 may be hot (this is determined by the equipment the connector is plugged into), with the remaining pin being cold. To maintain correct polarity in a signal path, it is important to be aware of which pin is hot or cold on all connections, and wire your cables accordingly.     Jack Tip Ring Sleeve Signal Balanced +/Hot/In phase -/Cold/Out of phase Screen Signal Unbalanced Signal x Screen   Jack Tip Ring Sleeve Insert Send Return Screen   Jack Tip Ring Sleeve Headphones Left Right Screen   Neutrik - Speakon 1- 1+ 2- 2+ 3- 3+ 4- 4+ Full Range (NL4) -/Cold +/Hot/Signal X X X X X X Bi-Amp (NL4) LF -/Cold LF +/Hot/Signal HF -/Cold HF +/Hot/Signal X X X X Bi-Amp (NL8) LF -/Cold LF +/Hot/Signal X X X X HF -/Cold HF +/Hot/Signal Tri-Amp (NL8) LF -/Cold LF +/Hot/Signal Low Mid -/Cold  Low Mid +/Hot/Signal Mid -/Cold  Mid +/Hot/Signal HF -/Cold HF +/Hot/Signal Quad-Amp (NL 8) LF -/Cold LF +/Hot/Signal Low Mid -/Cold  Low Mid +/Hot/Signal Mid -/Cold  Mid +/Hot/Signal HF -/Cold HF +/Hot/Signal   5 Pin Din Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Midi X  Screen X  Signal Signal   5 Pin Din Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 180o Audio Load Left Signal  Return/Sreen Source Left Signal  Load Right Signal Source Right Signal