I have a alpine mrpm-1000 which pushes 1000w. Im running them to 2 12 rockford punchs which are 800w rms combined. I dont know what to set the dB screw in the side to i have a choice of 0,6, or 12 max. Should i run 3/4 on the gain screw so im pushing about 800 rms from the amp to both my subs?