Hmmmm.... guess I should have slept on this one. Please let me know if I am starting to understand this any better.

1. When using the speaker-level connections, I would not set the sub crossover to bypass, but to where I actually want it to be -- say 60-80 Hz. Oops. I'd only set to bypass if I were letting the receiver divide up my signal.

2. Whether I send the signal to the subwoofer by high- or low-level, my mains end up with the same signal (with the assumptions of my original post.) The sub's crossover is only telling the *sub* where to jump in. It does NOT cut off any signal passed thru to the mains. Which is why I would want to set my sub's crossover where my mains start to roll off (on their own).

Sorry for the conversation with myself.... Any other feedback on setting up stereo subs with M22ti fronts and a Denon AVR-3802 would be much appreciated.