Periphery is an American progressive metal band based in Washington, D.C., formed in 2005. They are known for their heavy, progressive sound which employs poly-rhythmic patterns and soaring melodies. They are considered one of the pioneers of the djent movement within progressive metal. The band consists of vocalist Spencer Sotelo, guitarists Misha Mansoor, Mark Holcomb, and Jake Bowen, drummer Matt Halpern, and bassist Adam "Nolly" Getgood. Periphery released their self-titled debut in 2010, followed by Periphery II: This Time It's Personal on July 3, 2012. On December 3, 2013 they released a teaser for their EP Clear, which was subsequently released on January 28, 2014. Periphery's third and fourth studio albums, entitled Juggernaut: Alpha and Juggernaut: Omega respectively, were released on January 15, 2015. All Periphery material is self-produced by the members of the band.