I don't think the OP has enough knowledge or electrical to run 4000 watts or even 2000 watts. That's not an insult. People shouldn't jump right in with both feet till they do a little research. Maybe he should start out with something simple. Maybe a couple Sundown SA's on 1200 watts or so in a nice custom box and then go from there. Otherwise it will be a short lived and expensive hobby for him....