Anyone who owns a mustang. I own a v6 2000 mustang without the mach system. I had my CDA-7894 installed by some guys in the shop. I didnt really have the car long enough to tell how much of a difference it made in the loudness of the speakers, and i have felt that they arent all that loud. Are there any factory amps in my car? Is it possible i am not using the amps in my deck, but instead, still using factory amps?