Quote Originally Posted by Baejie View Post
That's definitely what I'm looking for and I played around with this for a while but still couldn't get it to work.

When reading this I just gave up trying an elegant solution and powered the Pi through the USB-A on the Rotel, so now when I turn the amp on or off the Pi also turns on and off. Simple and it works.

Will continue playing around but this will do for now.

Thank you both!
Please come back with any solution, it may help others . There are a growing number of amplifiers with inbuilt dacs and a usb connection.