Wiring Fosgate HX2's

[CleanSierra]

So my EX brother in law decided to drop one of his old Fosgate subs the other day, resulting in coil rub. He was running 2 Fosgate 10" HE's. Hes old school and decided to stay that way. He picked up two 10" HX2's that he's gonna run now. They're dual 4 ohm 3" VC subs and you guys remember they were nicely built. So here's the problem I'm having: he has TWO of the old Fosgate 400a4's and wants to run 1 amp to each sub. The subs are in separate boxes downfired in a SuperCrew Ford. Theyre in roughly .60 cubes a piece. How would we wire these to the 4 channel amps to get the most power out of them, te RMS of each sub is 500W. Can we run two channels to one VC and 2 channels to the other? Help with suggestions guys, these little subs are gonna be power hungry.