Thanks for the advice, in my setup, the amp is in a closet nearby while the SSP is under the TV, the 2 are plugged to different wall outlets so I'm not entirely sure the auto-on outlet would work for me but maybe (I was hoping to keep the amp plugged to a separate wall outlet to avoid ground loops and to avoid overloading that one outlet).
The other approach I'm thinking about might be a DIY arduino/CAN BUS/relay system… that could be a fun project… if I had time on my hands that is.
Alex.