I was wondering if you guys could tell me the difference between the parts that come with the nondsp stage 1 upgrade and the dsp stage1 upgrade. As well as the difference for the nondsp 108 sub and the dsp 108 sub package.

Reason why im asking is this link here: http://www.xoutpost.com/bmw-sav-items...amp-combo.html

Someone is selling the stage 1 upgrade speakers and sub for a dsp car, and wondering the difference to install in a nondsp car.


Thanks