A legend in the annals of Boss pedals, the HM-2 Heavy Metal is, obviously enough, a pedal intended for those who play heavy metal music. For a lot of players in the heavy realm, the appeal of the HM-2 has a lot to do with the insane amount of boost and tone-shaping this pedal provides. Its unique character has spawned several imitators and landed the HM-2 a place in the signal chain as a who's who of extreme metal players.