I have a 2013 Ram 1500 Sport Quad Cab with Alpine system. I am looking to add an amp and replace speakers. Can anyone please let me know what size speakers are in the dash, front and rear doors. I would like to put component in front doors but I don't know what size I can go with. I also plan to run good set of 6x9 in rear doors. I'm thinking of going with either hybrid audio or focal. Thanks in advance for your help.