Yes you can and I did just that.... it worked perfectly, but any more triggers then that and I got an error from my receiver, "12v trigger error"
It would draw more then it put out...
I ended up using the 120v switched outlet off my receiver to power up a wall wart to turn on my pro amps with the Niles AC-3
I have been holding off for so long on getting a dedicated pre-pro, that I thought I would start with that unit, as it has the most to offer minus the analog in SQ issue.... which I don't use...