Help me out with car systems!!!!!!!!!!!!! Please woofers, amps help !!?

My thoughts on wattage is watts is how much power is being pushed into your speakers, measured in watts, of course. I don't know much detail but i do know my little bass amp has a 15" speaker and is 150 watts. Depending on the bass it can be REALLY loud, like my Shecter bass. It has 2 active EMG pickups which push more power than a fender squire bass i played with passive pickups. It really wasn't loud at all. Do some youtubing and check out reviews on amps and woofers.