I just recently bought some Boston Acoustics crossovers and realized that they came with wires. Can i use the wires already installed in the car or do i have to change them out with the new ones that the speakers came with?

 

since the speakers you bought have a higher power rating than the stock speakers, it would be a good idea to change the wire too. i'm not saying that your aftermarket amp (i assume your using one) will fry the stock wiring, you just wont get the performance that you want out of the new speakers.