i wired all my amp and speakers up already and just neede to find out where the rca goes. i bought this box that has 2 green and 2 white wires on one side then rca out the other. i tried to put the four wires to the door speaker and i did not get anything from the subs. should i be hooking it up somewhere else?

 

Did you buy a RCA line converter? Do you have a cable running from the + side of the battery to the amp?

 

pop up your cup holder you need to tie into the factory sub wires im not too sure what color the wires are but ill check and get back