Going keep them on the JP 23 for a while, it's putting out plenty of power. I had the bass knob all way down, you have to cut it up a little to get output. Kind of like a on-off switch I guess. Got get them broke in though. Probably going get the JP33 later 9n to get their full potential. That Amplifier takes a 350 amp fuse, might have to upgrade to at least a 370 amp alternator, And 2 xs batteries, but IDK. Just might try it with the Mechman 240 alternator, and 1xs 3400 see what my voltage is.