| Number | X-pin, colour | Description |
|---|---|---|
| X18774 | 12-pin, Black | Plug connector Subwoofer speaker Top Hifi |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Not used | ||
| 2 | A | Positive signal, subwoofer speaker 1 | Amplifier (Top Hifi) |
| 3 | A | Negative signal, subwoofer speaker 1 | Amplifier (Top Hifi) |
| 4 | A | Positive signal, subwoofer speaker 2 | Amplifier (Top Hifi) |
| 5 | A | Negative signal, subwoofer speaker 2 | Amplifier (Top Hifi) |
| 6 | Not used | ||
| 7 | Not used | ||
| 8 | Not used | ||
| 9 | Not used | ||
| 10 | Not used | ||
| 11 | Not used | ||
| 12 | Not used | ||