Senior Mark Matsuki gets home, throws his backpack to the side and gets to work. Unlike typical students, his work doesn’t involve pencils or books. Instead, it involves subwoofers, speakers, flashing...

When he was in eighth grade, DJ and sophomore Mark Matsuki bought himself a pair of Beats Studios, over-ear headphones currently priced at $299.99 at Best Buy. "I remember going into the store and just...