jdm535i
07-01-2009, 01:49 AM
hi i have 1990 euro spec 535i the Stereo was gone when I purchased car. The factory preamp is still installed. I have purchased a aftermarket Blanpunkt cd/mp3 player. I have a kenwood 4 channel amp and a set of subs in a box. Sorry for my ignorence but I have no idea as to how to incorporate the 10 factory speakers and the two new subs into a working system. Is it best to use the factory preamp or redo the whole system. All input much appreciated.