The subs are 4ohm DVC. My suggest is wire them each at 2 ohm and connect them in parallel so that your amp sees a 2 ohm load, a 2 ch would work but will get hot to the touch , a class d monoblock (1-ch ) would work best for your application.
Looking at a 1 channel Memphis amp, says its 1200RMS or something like that, not sure of the model number, should know more today, and will tell you what it is, a buddy is trying to part with it, kinda,lol..