Yamaha P5000S amp and a 2 ohm load?

For anyone that has this amp, as I, do you know how comfortably this amp will handle a 2 ohm load? Right now I'm running the amp into two 4 ohm Acme low B2 cabinets in parallel of the A and B channels, giving me 750W into each cabinet. To get a little more juice going through the Acme's and give myself some more headroom, what If I daisy chained the two Acme cabs and ran the amp out in bridged mono mode off the "A" channel? Too much stress on the Yamaha?