comment above is way off and incorrrect. the P 6x9's run off 75w continuous power. U BETTER have an amp or they'll sound like dirt. how much power do u have? u will need a 4 ch amp for the speakers (75w x 4 continuous) then another amp for the sub. buy a wiring kit for multi amp set up. it will allow u to power both amps down the road. and use the pre-amp out signal from the kicker to the new amp later on. simple. use crutchfield.com's learner articles to understand hooking up multiple amps better.