The switch in back turns off the power to the supply (complete off). The button in front I believe turns off or puts into the sleep state everything but the supply. For some reason the 9W stand-by power for the DSP was deemed reasonable at the time they designed it. I'm not sure if they will change it in version II. If they do I might try and get mine retro-fitted. My current plan, if I ever get around to it will be to automate the room. Part of that will shut down the units after a while. Not sure what I'll do about the soft-start ...
