Just wanted to give an update - I've been using the sub with dual inputs for a month now - it works fine, no conflicts, hums or anything out of the ordinary. I do have to adjust the crossover periodically, which I pretty much expected, but it seems to work fine.

I also have a question on banana plugs (which I haven't used) - I got a set of Monster's BPs - I can tell it's going to take a heck of a lot of pressure to insert them - enough to move the subwoofer (not an easy thing!). Is this just the nature of these plugs? I'm working with a bare wire wrap just cuz I'm reluctant to force it. What gives?

Happy hallows...