John - I've read about the Audyssey system before but haven't heard it. What reciever or Pre/Pro actually uses it? When I read up on it, it sounded like a big compromise of your sweet spot. I'm also not sure why it wouldn't work for two channel. I'll have to read up on it again as I didn't know it was actually available in the market now. My take on the Yammie, Pioneer, etc Auto-Eq is that they often times do more harm then good. I think the technology has promise but is still in it's infancy.