See @Joeykun rig above...this is EXACTLY what I'll be doing. (2) Genz Benz UBER 4x10 cabs driven with my Genz Benz 12.0 ShuttleMax! (2) channels, both 600 watts, and one heck of'a good time! Outdoor festival rig only...maybe.If so you need a head that goes down to 2 ohms to use 2 of them.
Thanks everyone, I will likely stack'em!