When I upgraded my sound, I did head unit > door and back speakers > amp > sub. I know people who will upgrade their head unit and speakers together. Did anyone do everything at once or do most people do it in stages like I did?

 

I did mine all at once, but it really makes no difference if it's done in stages, just it will keep sounding better as things are upgraded

 

i did head unit, then a different head unit and a nexus 7, then slapped a sub box in the back. will do the other speakers at some point.

 

Kept my factory head unit since I didnt want to lose steering wheel controls, but changed all the interior speakers, then added sub and amp, then did my Nexus tablet install in the dash.