What exactly is the difference between "large" and "small"? (hey....this is a family show!)

Let's say I have a pair of front speakers that can handle anything and at power levels exceeding my amp's power rating. Let's also say that I've got a kickin' sub like the LFM-1 and would like to take advantage of that....

So, do you set the mains as "small" and choose a low crossover at 40hz? Or do you set them as "large" and set the sub at "L+R/LFE"? Does "large" imply no bass management at all?

I haven't done any exhaustive testing on my system yet, but so far I'm diggin the "large" setting.

Cheers,