JAMMINJC- I was thinking one thing, and wrote another. What I meant was, when you do engage the 80 Hz analog crossover, everything works as it should it terms of the high pass filtering, the low pass filtering, and no double bass. Obviously, when the analog crossover is enagaged, you *do* get summing to the LFE channel of all the info from the mains below 80 Hz. Just that there is no double bass, because the mains are high passed at 80 Hz as well.

With the 80 Hz crossover off, you get summing to the LFE *and* full range mains, which gives you "double bass."

Now, as far using the 5.1 analog input vs bypass mode on a two-channel analog input: you will also get double bass on the analog 2-channel input if you have your speakers selected as small. You will get full range mains, *and* summed bass to the sub. My understanding is, if you set your mains as large in 2 channel bypass mode, the 950 turns off the sub, so no double bass, just full range mains.

I haven't really listened to much analog 2 channel bypass (the 950's DACs are good enough for me), so I can't really comment on the differences between that and the 5.1 analog input, except to say that's how it's *supposed* to work.