I just ran a quick test on a circuit with two EP600s a ADA1000 and a ADA1250 all in stand-by. These are all fairly new units.
Roughly, I'm seeing a 50+ Watt draw. The other circuit ... 2 EP600s, 2 DSPs, 2 ADA1500s will be more. I suspect in the 60-80 watt range ,,, I'll check it when I get some more time.