I have an 07 mustang gt with shaker 1000 and i did not do the resistor, its on back order, but I will install it as soon as i get it in. my question is, is it harming my speakers when it goes 'pop' on startup?
btw, for any mustang owner who is unsure of putting in the avic d3 with their shaker 1000, omg do it, its incredible how much better the sound quality is, i had no idea that the head unit could change so much. also, you have so much more control over the output to the rear subwoofer and other settings, sounds amazing and hits so much harder.