Those subs really aren't the best chioce for that amp. I think the best you can do is a 4 ohm final load that will only give you 600 watts you won't be able to use all of tha amps potential. They will however get 300 watts each which should be plenty loud. go to
http://www.jlaudio.com/tutorials/wiring/index.html
Itll show you how to wire it up for a 4 ohm final load.