@bulldogger Aragon and Acurus are actually the same company or at least started out that way.
Besides Krell XD amps, who makes "smart home" friendly amp, IP control, Telenet, RS232?
I have Krell XD amps that I control with my Kramer Control system. Kramer has a driver which allows the amps to be powered on and off, status feedback and the ability to mute individual channels. To my ears, muting the unused channels on a multiple channel offers improvement in sound quality for stereo listening.
The only previous amp that I owned that offered these features was 20 years about and that was the California Audio Labs MCA. I am asking about high-end audio amps with more advanced features than just being able to power on with a 12v trigger.