hi there ive been reading the sticky but im still a little bit confused. I want to install an apline type r 15" in my 2007 bmw 328xi.
here is what i have
http://www.crutchfield.com/S-wKs1SnA...SWR-1522D.html
http://www.amazon.com/gp/product/B00...ilpage_o02_s00
http://www.amazon.com/gp/product/B00...ilpage_o01_s00
im reading something about technic harness? am i going to need that? or should i just get a high to low