| Number | X-pin, colour | Description |
|---|---|---|
| X3270 | 2-pin, Black | Plug connector Pneumatic speaker, right |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Negative input signal, speaker | Connector X3251 |
| 2 | E | Positive input signal, speaker | Connector X3250 |