bmw sound systems

[JuN14sCR]

i want to put a pair of 12's in my car, but i don't know if the stock bmw hedaunit comes with a pair of preamps? i'm asking because well.. if i need a new headunit, i have to take out my factory headunit.. and well, we all know that a din style headunit isn't going to fit in there nicely. any ideas??

[MarvelPhx]

The BMW headunit does not have RCA preamp outs. The BMW audio system uses a balanced differential wiring system for it's audio, making an adapter of some sort vital to attaching aftermarket equipment.

I have also seen adapter kits for the dash to be able to install a DIN radio. You can find then online.