The sound system in my Car has slowly been evolving:
The Car is a 98 528i 5 speed, it came with i standard bmw hifi system; a tape deck, oem amp mounted in the trunk, tweeter mid and woofers mounted on the front doors, tweeters in the rear doors, and two woofers on the decklid.
I first added an old subwoofer from a previous car (dual Sony Xplod XS-L101P5 10s mounted in a large sealed box) and Crossfire VR404 amp.
The next thing i did was to get a DICE silverline pro adapter to control/play my ipod via the radio.
After that i wanted to change out the speakers in the car so i got a pair of MB Quart PVF 213s for the front and RVF 213s for the rear. I had them running off the stock amp, along with the stock tweeters.
Installed in the front door pods