One other thing after looking at the 2500-7. It's rated at 3X525W & 4X250W. That's a total of over 2500W. At about 70% efficient, that means you need over 3200W to power this thing. How do you get that out of one household circuit? Or am I misunderstanding something?

This reminds me of Carver's Sunfire amp that I ranted about a few weeks back .