#1
So I'm getting a car soon, and I want to put a new sound system in. I want to spend around 400 or so for everything (I plan on getting used stuff).

My question is what do I need? I know that I need an amp and subs (and a box to put them in), but what kind of amp, how many watts, and how many channels? Do the subs wattage have to match the amps wattage? Do the speakers wattage have to match the amps wattage? Do I need to put in new speakers, too?

So yeah, if you could answer any of these, I'd really appreciate it.