My 05 F150 has a Shaker 500 deck that I assume the previous owner pulled out of a mustang, Did these systems come with a factory sub? Would this mean I could wire in a sub without major changes? (I would be adding an amp that I have from my previous vehicle)

 

yes you can...you would need the plug and all the wiring to go to a factory amp. i have the shaker 500 in my mustang and there arent any sub controls....when you up the bass, the sub bass goes up along with the bass in the door speakers. itll be easier to just add an aftermarket setup instead.