Alright so I built a box recently and have decided to do something that i've never seen done. I am planning on installing all-weather speakers right into both ends of my box. This is where you guys come in. First: What would be the best way to hook up the speakers to a power source? Extention cord or just run them off batteries? And next what kind of speakers should I use. They need to be 9 inches by 9 inches. Any help is appreciated!