Thanks, guys. Yeah, I initially noticed a difference while just listening to music -- didn't need an SPL meter.

Daryl -- the behavior of the 990 in bypass mode when using a digital input still applies a crossover to the mains when they are set to small. I also did a test with a digital input initially, but repeated my tests with analog only, and got the results that you did.

The Outlaws are still looking into this. I think I'll be hearing from them before too long...