Well its better to over do it. What does the wattage say per sub? use a JL W7 for example
They handle about 1000watts
If you put a 1000 watt amp on there.. itll sound good
if you put a 3000 watt amp, and tune it to 1000... its gonna sound fricken fantastic..
I myself would run the max that the subs can handle.. so i would run a 1200x2 minimum..
they are 600 Watt RMS.. 1200 Peak.. each.. so if you wanted nice sound run a 200 to each of them and stick them at 600.. sound nice..
Just my $0.02