basicly what matt (oh techincal almighty lol) is saying is...you amp is too small. it will push (play) your subs, but after playing for a certain amount of time at certain levels, it goes into protection aka shuts off to stop from burning up. and there's nothing wrong with kicker. get what you like but make sure you have enough power to push them at the volume u want to play them. (i would suggest some audio brands, but its really to each its own) so either turn the amp down (turn the gain down) or get a bigger amp
