Hey everyone,

I was just wondering what exactly it takes to upgrade from the normal soundsystem to the DSP. I have purchased a dsp amplifier, bmw oem subwoofer, and mounting brackets. How can I tell if my car was prewired for dsp? If it wasnt, what kind of cost am I looking at to wire it properly? Right now I have the business cd/radio without the dsp button, but I will be getting the 16:9 screen soon.