Sunn 1200s, Mesa Powerhouse Cabs

[bellis1]

I currently play on a Sunn 1200s. (minimum impedance-2ohms)
Specs/Ohm loads:

1200 watts at 2ohms.
850 watts at 4ohms.
___ watts at 8ohms.

I'm wanting a 4x10 and a 1x18 setup for my cabinets, and have found a Mesa Boogie 4x10 8ohm cabinet that i'm looking into buying. However, to get the desired 1200 watts, I need two four ohm cabinets. If the 1x18 I get is 4 ohms, and the 8ohm 4x10 cabinet, how many watts would my Sunn be pushing?

Basically, i'm asking..
If the amp pushes 1200 watts at 2 ohms, does it push 1200 watts at 2.6 ohms?

[protoz]

I would guess around 1000 watts. Still plenty for anything you could need.