whatz up,i dont know much about memphis amp. but i just bought 2- pdx 1000/1's ive got 6 15's in the back seat, just the 2 are moving my subs,im gonna get one more soon, an put 1 pdx on each 2-15's. they also r small space savers and pull a low current at the same time deliver the power any other amp will. my bass is very clean,not to forget that they are also stackable,so the heat thing isnt a worry. look them up an see what u think. also i got my amps for 700 ea. out the door.