Wow some people here who don't understand how fuses work, or what they do. Scary. Fuses are what keep you and your car/stereo from dying a horrible flaming death. Fusing is serious business, not something that you learn from trial and error. You could at best destroy alot of money's worth of equipment and/or vehicle, and at worst die or be seriously injured. If you dont understand, please have a trained professional set up your power/fusing system.
(this isnt for darkhart or thunda, they are exactly correct)