well as far as the best goes that depends on what you are willing to spend it won't improve the power by much but you first need to go and see the watts on the kicker then the amp needs to be = to or grater rockstad is a really good brand another one too lok at is duel that's good and cheep$ great quality but make shure if you got like a 400 wat sub that you don't get a 1000 watt amp ok well hope that helps
