subs get loud at random

As long as it plays with each one plugged in, that rules out the possibility of my thought.

ok just hooked them up at 4ohm and u can barely hear them turn the gain all the way up kinda distorts but no bang subs barely move2004 f150 stx 24s 2 12"cvt kickers under seat rf p500-2 amp bench tested at 767rms and indash tvdvd

ok i just figured out the problem its my amp went to a friends house he had a old lanzar vibe 800 watt amp i hooked it up all settings down all the way besides the bass boost which is a switch and turned it up and it banged prity good twice as loud as my amp at 4 ohms with gain half way and bass boost all the way up so if anybody has a power acoustik or kole amp sell it now before this happens to u thanks for the help guys   will never buy another amp from pa they are junk wasted 300 bucks on a big paper weight lol2004 f150 stx 24s 2 12"cvt kickers under seat rf p500-2 amp bench tested at 767rms and indash tvdvd

ok went and bought a rockford p500-2 amp today all i got to say is wow the subs dont even sound like shallow mounts whole truck shakes its awesome paper from rockford said tested at 767wrms subs r 400rms a piece perfect match if any body has kicker shallow mounts get this amp sounds fantastic with the subs2004 f150 stx 24s 2 12"cvt kickers under seat rf p500-2 amp bench tested at 767rms and indash tvdvd