Something just dawned on me tonight. One complaint I had was the ability to easily listen to 2-channel without the sub and in all other scenarios (pro-logic, DD, DTS, etc.) have the mains set to small and using the crossover. I was able to accomplish this before via a "bypass" setting on a different processor. If you flipped to bypass, it did nothing to the mains and a full range signal was sent.
Well, you can accomplish the same thing so long as you set the crossover on your mains equal to where they actually sharply roll-off.
I mean, if I set my mains to large with a 40 Hz crossover, and my mains sharply roll-off after 40 Hz, with the sub setting to L/R+sub, anything below 40 Hz on your mains is added to the sub. So essentially you're able to get the 40 Hz and below data to the sub, yet leave your mains to large for bypass.
The key is to running tests and charting exactly where your mains roll-off, and setting the crossover to that.
Am I way off base here? I think that's right. Let me know if I'm losing my mind
I guess you might get a little overlap based upon how quickly your mains roll-off, but it can't be that bad.

I thought that's the main difference between "Stereo" and "Bypass". Is this not the case?