I have afosgate punch 500.2 2 channel amp and a audiofonics adf-270 10" inch sub that has 500 rms 1000 peak watts, and is dvc 4-ohms. The amp is 2-ohm stable at 2x250 watts. I want to know how to wire the sub in the box. Currently I have it wired so all +'s are together and the -'s together(what...