Excellent amount of information here, glad that I've gone through it all.
I'm going to install a component set in front this weekend and as I'm going through my steps I'm trying to figure out where to install the crossover to be able to tie into both the door and dash speaker wires? My thought is that if I place the crossover in the door itself I'd have to run new wire out the door and to the stock dash location which seems like a huge hassle to get through the harness in the door. I'm open to installing the tweeter on the upper door trim at the bottom/front of the window and just unplugging the dash speakers and leaving them there but if I can easily place them in the dash I'd rather do that. What have some of you guys done?