Stefan,

I use the trigger from my G68 to switch on/off a Parasound power amp, and this works very well.
You have to configure the trigger for each source you have on your G68 individually.
Go into the setup program and for each source (including the G68 itself):
- right click on the source
- select "properties"
- go to tab "source"
- specify which trigger output you want active for this source

Regards,
Mark