so i put a new cd player in, kenwood kdc-mp435u and i already had put new door speakers in my 97 900 SE coupe...rockford fosgate....i had them in with my stock unit and it had some nice bass, but not that i put in the new cd player it seems all the bass is going to the front speakers. if i put an amp and 2 subs in, will i get the base back in my door speakers...i remember the stock unit had an amp built into it, so i figure putting in an amp will return the power to the door speakers, am i correct or????