hifonics over rates there sht i dont no if the saem applies for stock ones but a fully loaded one needs more than 2000watts and that will not give out 2000wrms
their rated at 2krms but can take more easily...hifonics tends to be overrated but i think youll see more than 1600 from it at 1 ohm...also, hows your electrical system? if your gonna run 2k you shuold get a HO alt at least. personallly, i would get a different amp for that sub...why not get a fully loaded BL for that amp, they can take 1800rms daily fully loaded...both would be relativly the same price