I had only one Eon10 G2, and I sold it. I wish I hadn't, but I needed the money after purchasing the KP100S. The KP100S has only one Low Z output via 1/4" or XLR.
I don't know. I've had the KP100S for over a month, and I everyone's been happy with it, but I've had two jobs that have demanded enough volume to start compromising the high fidelity. I'll see if a subwoofer helps, otherwise, I'll have to buy another powered speaker.
I was thinking of trying out the Cerwyn Vega LW-10
http://www.google.com/search?q=cerwin+vega+lw-10&hl=en&lr=&ie=UTF-8&start=20&sa=N. It's a 100 watt subwoofer. If I used it, I could turn down the bass (and thus the volume) on my KP100S. This might be helpful for the jobs where I walk in, and I say uh oh, this room is big. I have a few outdoor parties scheduled, just three, and for these I have charged enough that I can afford to rent something.
Beakybird