Urgent!!!!

i have a brand new battery in my 93 century and my son tried to str8 wire some 12'' speakers w/o a amp and naw the car it dead is it the battery or the alternator or spark plugs or what... ineed help bad

What is the battery voltage?

I"m not sure what you have already done to troubleshoot.
Lets start with the basics. Did you unhook the speaker wires and charge up your battery? If it works then, then it's the way he wired the speakers.
If you strait wire the speakers then they will have power all of the time. Even when the car is turned off. They will have to be turned off every time you turn the car off. I did that with a radio when I was a kid. Works fine but don't forget to turn them off.

Hope this helps