The 3 wires would be hot (black), neutral (white) and ground. I would at least have a double outlet box, 4 sockets pig tailed.
I plan on running 2 outlet boxes to my room. One outlet box for my amp with 2 sockets on the front wall. And then a 4 socket outlet box for my components on the side wall. I don't need 4 sockets right now, but in the future I may. It is easier to put in extra now than have to add outlets later. I am going to use some PS Audio outlets I have lying around to start. So the dedicated outlets in the room will be light grey, while the rest of the outlets in the room are white.