So the amp I'm getting is a 1200 watt amp constant from 1.5-4ohms and 14.4 or 12 volts. My subs can each take up to 500watts each. To adjust the gain with a volt meter I know you take the squar root of th power of amp in RMS multiplied by the resistance of speaker load. Adjusting the radio to max listenable volume and then adjusting the gain to the correct voltage is supposed to ensure that you won't go over the max wattage for the speakers.
If I were to input the max wattage RMS that I don't want to go over instead of the max wattage the amp can send out, would that effectively make my speakers safe from getting too much power? If I'm confusing in asking this let me know and I can try and reword it. Hopefully you all understand me though. Thank you in advance for any of your help.