4mm banana binding posts are the standard speaker terminal on amplifiers and speakers. Red = positive, Black = negative. Accept banana plugs, bare wire, and spade connectors. Also used in lab test equipment.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | Positive Terminal | Speaker positive, red | ADC |
| 2 | Negative Terminal | Speaker negative / common, black | GND |