Need help with installation of an Orion amp

[lsufan112001]

I have an Orion 225G4 that i want to bridge, as to get more power out of the amp. I'm from the old school, like around 1989, 1990, some I'm technically challenged with the new stuff. I had a Red 50 back then.

Anyway, I'm running this newer amp to two 12"kickers (4 ohms). I will be using an Audio Control as the crossover.
1) How should the Orion be set, when looking at the left and right phases, they both have different settings?
2) How should the speakers be wired going to the amp?
3) On the voice calls of the woofers, should they be wired in series or paralled, which would obviously lower the ohms.

I'd appreciate any help, thanks a lot fellows.