Target audience

Based on the style and the artists I intend to feature in my magazine I have decided upon what my target audience will most likely be. The target audience will most likely be predominantly male teenagers whose ages range from about 13-18. I intend to appeal to this age/sex mainly in my product although I want to make my magazine appealing to as many people as possible, this would mean I have a group of definite readers without unnecessarily shortening my readership.