Researching Target Audiences of Different Music Magizines

For my magazine my target audience was rock/indie teenagers. Within these social groups come certain values and syles. I chose this genre and aimed it at this audience as I already know alot about them. I don't personally fall into this catergory but I have personal knowledge of the area. I looked at other magazine's that follow this sort of style to gain understanding of what to do for my own magazine.