Very curious indeed. And not to state the obvious, but the guy did indeed do everything I would think of. However, I did see a 400+ wattage usage on that post, so maybe the rear channel for example was being overdriven?

Scott,
As you say the complete story is not always in a post. Would it be possible for you to post in this thread of what the problem was with the 770 he returned ( if even one exists?) I would be curious to know if you guys did find one.

Just my $0.01 worth ( used to be $0.02, but the dollar sank again...)