I have a 95 Nissan Sentra with upgraded High Output 140 amp alternator. I have 2 Rockford fosgate amps 1 is bd 1000.1 and the other is 1001bd, so pretty much the same wattage, I'm running 2 12' Alpine type X's 1000 watts each so 2000 watts rms. My question is do I need to get a bigger alternator...