HiFi amplifier 12V Trigger out connector

Hi to all,

is there any Shelly relay(?) suitable for sensing 12V trigger voltage as found on HiFi equipment (so called Trigger out port). I have a preamplifier with TRIGGER OUT and would like to power ON/OFF three other devices in my stereo setup. Other three devices are plugged in Shelly smart plug and are lacking TRIGGER IN ports. For example:

- When preamp is powered on-> 12V are detected on TRIGGER OUT -> Relay (?) senses the voltage -> Relay (?) turns Shelly smart plug on

- When preamp is powered off-> 0 or lower voltage is detected on TRIGGER OUT -> Relay (?) senses no/lower voltage -> Relay (?) turns Shelly smart plug off

I have some Shellys 1 laying around, could I use them for this? Any help is highly appreciated.

Thank you! How should trigger cable be wired to Uni? (+) to IN-1 and (-) to GND?

Thank you!

Edit:That didn't work. I had to wire 12V trigger voltage to ANALOG IN & GND on UNI to make it work.