As both co-owner of Hessle Audio and creator of several classic tracks, Ramadanman (aka British producer David Kennedy) ranks as one of the world's most important figures in dubstep and its proliferating offshoots. He's a favorite of taste- making DJs like Mary Anne Hobbs, Skream, and Kode9 for music that twists the elements of the most advanced electronic sounds into novel configurations. Ramadanman's beat labyrinths are endlessly fascinating. Local future-bass luminaries Ill Cosby and 214 open. (Baltic Room, 1207 Pine St, 625-4444, 9 pm, $10, 21+)