The TA4F is a 4-pin mini XLR connector used on Shure wireless transmitter body packs for microphone and instrument input connections. Carries balanced audio plus optional bias voltage.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | GND | Ground / shield | GND |
| 2 | BIAS | +5V bias for electret capsules | PWR |
| 3 | AUDIO+ | Balanced audio positive | ADC |
| 4 | AUDIO- | Balanced audio negative | ADC |