Various, Eric Clapton, Emerson, Lake & Palmer, Caifanes, Milli Vanilli, Carmen Z, Jam, Bon Jovi, Cinderella, Klaus Meine, Metallica, Mötley Crüe

Bay Area Thrash Metal

Riffs cut like machine tools, tempos past 200bpm, and a garage circuit that rewrote American metal.

West Midlands Metal

Downtuned riffs from a factory city — Sabbath to grindcore, four decades of Birmingham making music heavier.