Can someone explain the Bass Mgt on the 1066 vs the 950, a little more clearly?

Does the 1066 have the simple capability to let the L&R be "large" i.e. full range, and the Center + surrounds have the low freq. routed to the Sub?

Does this cause the so-called double bass when doing so?

On the Outlaw does this set up cause the bass to be repeated on the L+R and the Sub?