I am redoing the install in my F150 HD truck. I don't want to have to go through the process of explaining the whole thing since I pulled out everything except the HU so the link below takes you to that other site to show the first iteration.
http://www.diymobileaudio.com/forum/...elaborate.html
The truck
List of what's going in it.
Pioneer P800
Helix dsp
Phoenix Gold DD-10
Pioneer TS-C720PRS 1" tweet 6 3/4"midbass
Pioneer TS-062PRS mids
JBL GTO1020D 10" sub4
JL Audio HD 900/5
JL Audio HD 600/4
On with the update. Used the existing subbox/ amprack and added sides that allowed for adding another amp.