I tried every configuration I could think of, and couldn't get used to it. I tried it first without the sub and it was totally unacceptable to me. I then added a sub and it sounded much better, but still not good onstage.
Also, by adding a sub, that's more expense, more stuff to move and hook up, and the sub weighed more than the main unit.
When I asked people how it sounded they said great, but then the first night that I brought the two Compacts back, they said, oh that sounds much better than last night.