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 | X | Screen | X | 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 |