Pro+ 12V Trigger Issue – Power Amp (Emotiva BasX A2) Powers Off Mid-Playback

[Bertologic]

I’ve connected my WiiM Pro+ to an Emotiva BasX A2 using the 12V trigger. The power amp switches on and off correctly when the WiiM powers up or down, but after 2–3 minutes of playback, the amp powers off unexpectedly.


Interestingly, if I spike the volume on the WiiM, the amp powers back on — not ideal practice, but possibly a clue for troubleshooting.


I’ve checked the WiiM app for any relevant 12V trigger settings, but I can only find options related to 12V input detection, not output control.


Has anyone else encountered this? Is there a hidden setting, firmware issue, or known quirk with the 12V trigger output on the WiiM Pro+?

 

[Wiimer]

I’ve connected my WiiM Pro+ to an Emotiva BasX A2 using the 12V trigger. The power amp switches on and off correctly when the WiiM powers up or down, but after 2–3 minutes of playback, the amp powers off unexpectedly.


Interestingly, if I spike the volume on the WiiM, the amp powers back on — not ideal practice, but possibly a clue for troubleshooting.


I’ve checked the WiiM app for any relevant 12V trigger settings, but I can only find options related to 12V input detection, not output control.


Has anyone else encountered this? Is there a hidden setting, firmware issue, or known quirk with the 12V trigger output on the WiiM Pro+?

Adjusting the line-out level on the WiiM might help, though I'm no expert and can't say for certain. Do take care with the volume when making adjustments.

 

[Aquaman]

I’ve connected my WiiM Pro+ to an Emotiva BasX A2 using the 12V trigger. The power amp switches on and off correctly when the WiiM powers up or down, but after 2–3 minutes of playback, the amp powers off unexpectedly.


Interestingly, if I spike the volume on the WiiM, the amp powers back on — not ideal practice, but possibly a clue for troubleshooting.


I’ve checked the WiiM app for any relevant 12V trigger settings, but I can only find options related to 12V input detection, not output control.


Has anyone else encountered this? Is there a hidden setting, firmware issue, or known quirk with the 12V trigger output on the WiiM Pro+?

12volts are a nominal value. Most gear will react to a range of voltages beginning at 5volts? I suppose your amp has a very margin here.

 

[Bertologic]

12volts are a nominal value. Most gear will react to a range of voltages beginning at 5volts? I suppose your amp has a very margin here.

Thanks for the reply. I don’t think voltage range tolerance is the issue here — the Emotiva’s 12V trigger input doesn’t rely on fine voltage margins in that way. It’s designed to detect a steady 12V signal (with a small current draw, typically around 10–15mA) to open or close a relay, not a specific voltage within a narrow operating range like 5–12V.


What’s happening seems more consistent with the WiiM briefly cutting current on the 12V line after a couple of minutes, rather than a voltage threshold problem on the amp side. The fact that spiking the volume on the WiiM instantly reactivates the trigger suggests the output line goes “inactive” or low after a timeout when the unit is playing at low level — likely a software or firmware behaviour rather than an electrical limitation.


I suspect it’s a bug in the WiiM’s 12V trigger implementation, where it mistakenly stops sourcing current after a period of playback instead of maintaining a steady 12V output while the unit is powered on.