new car audio system

Okay, so I'm completely new to this kind of stuff and this is my first build. I have $250 and I will add on but for now I just want something cheap. I've been suggested a sub and amp but I'm not sure of any good brands/what to look for. I drive a truck so the only place I could put it is under...

names Jake and ive been doing freelance audio installs for the past year. I dont consider myself a pro and have never done any pro installs beyond speakers/component systems and a simple sub and sub box as well as dampening/deadinning. I do not have a lot of money and am studyin in a local...