I got some 5.25 speakers for the doors, I had gotten them in a sale for around $100. I had some 6x9s in standalone boxes that I put in the back behind the bench, all I had to do was extend the wires for the rear speakers to the standalone box. I also added a "bazooka tube" subwoofer behind the bench, I believe its a 6" or 8" and sounds great. For the deck I used a wiring harness as well as a bracket kit to install. All in all it was a fairly straight forward install!