So I am trying to find out if I can add the factory amp that comes in laramies to my bighorn that I have the stock 6 speakers and a REN anyone have any thoughts or ideas?

 

Easy answer...DON'T DO IT. The factory Alpine has a lot of built in garbage crossovers which makes it painful to deal with. If you want a quick fix for your speakers, buy a 5 channel amp and the pac harness that allows you to add an amp to your factory head unit. Replace the front door and dash speakers with a component system(with the crossovers), add quality 6x9s in the rear door and add the sub of your choice. You will be happy that you didnt deal with the factory 'premium' alpine GARBAGE AMP.