Need some help i got a 1989 lincoln mark vii and i just got this 500 watt audiobahn 12 but the thing is i do not know if my car will run the woofer off the sound that came with the car i have thet premium sound package it came with the car and there is an amp already built in could that power it and if so could it power another audiobahn 12 let me know i need some help guys really want to get this system to bang