No one hates noobs man, just the ones that act stupid as hell !!! You can do some research on the forum and webs and find A LOT of good info without even asking, and that´s exactly what you did before asking about the big3 so you are cool!!
Anyways, since the OEM wires aren´t in the car for audio systems, they have a lot of resistence, you need to upgrade them, but specially 3, wich are:
1) Ground from battery to chassis
2) Ground from chassis to engine block
3) Positive from Alternator to battery
By changing those wires, you gain A LOT, i can tell you this, my explorer went from 14.2v to 14.8v by doing this