YOU CAN USE A 4 CHANNEL AMP OR A TWO CHANNEL BUT YOU WILL RUN INTO OHM LOAD PROBLEMS, WHAT I WOULD RECOMMEND IS THIS HERE, YOU HAVE 4 SUBS, ALL ARE 4 OHMS, TOTAL YOUR LOAD IS 1 OHM, POWER AKOUSTIC MAKES A 1000 WATT AMP AT 1 OHM, SO YOU WOULD BE GETTIN 250 WATTS TO EACH ONE OF YOUR SUBS, THIS IS ONLY A 1 CHANNEL AMP BUT INSTEAD OF HOOKIN EACH INDIVIDUAL SUB TO THE AMP YOU RUN THEM PARALLEL AND LINK THEM TOGETHER HOOKIN ONLY ON SUB UP TO THEM AMP WHILE THE OTHERS ARE JUMPED OFF THAT SUB IN SERIES.