Power management and GPIO
Power management
Auto On
| Mode | When the amplifier comes out of standby |
|---|---|
| Audio | Audio activity on the output path (analogue or digital). |
| Audio (Eco) | Analogue input activity. Digital expansion is powered down in standby. |
| Audio (Digital) | Digital input activity. Expansion stays up. |
| Trigger (Eco) | Rear GPIO trigger. Network is disabled in standby. |
| Trigger | Rear GPIO trigger. Network stays available. |
| Network | A network/API command wakes the amplifier. |
There is a 1 second debounce after entering standby before a wake is accepted.
Timed auto-standby does not run in Trigger, Trigger (Eco), or Network — those modes are GPIO- or API-controlled.
Standby timer (Audio modes only)
Time with no audio before the amplifier enters standby. 0–120 minutes, 5-minute steps. 0 = Off.
Mute timer (all modes)
Time with no audio before the amplifier mutes. Same range. 0 = Off.
When audio returns, the mute lifts unless mute was applied by GPIO. A mute you set on an output (or that came with a speaker preset) is not cleared by GPIO unmute.
Save writes the page.
GPIO
The rear connector is documented on the page as an 8-pin block. Pins 2, 4, 6, and 8 are ground. The four signal pins:
| Pin | Function |
|---|---|
| 1 | GPIO 1 |
| 3 | GPIO 2 |
| 5 | GPIO 3 |
| 7 | GPIO 4 (also the Trigger Out pin) |
Modes on GPIO 1–3 (and GPIO 4)
| Mode | Behaviour |
|---|---|
| OFF | No function (factory default). |
| Standby NO | Standby when the pin is closed to a trigger input. |
| Standby NC | Standby when the pin is open (floating). |
| Mute NO | All outputs mute when the pin is closed. |
| Mute NC | All outputs mute when the pin is open. |
GPIO 4 extra mode
Trigger Out — 12 V output trigger, for starting other equipment.
How GPIO interacts with power and mute
- Mute GPIO is honoured in every power mode.
- Standby GPIO only drives power when the power mode is Trigger or Trigger (Eco).
- GPIO mute auto-unmutes only when the GPIO condition clears. It does not unmute a mute you set in the UI or a mute applied with a speaker preset.
- A stale GPIO mute flag is cleared at power-on.
Save writes the GPIO page.