1. Poland ( 1979 - present ) TSA ( Tajne Stowarzyszenie Abstynentów - "Teetotallers' Secret Association" ) is a Polish hard rock / heavy metal band founded in 1979 in Opole, Poland. Led by a charismatic singer Marek Piekarczyk, they are known as the pioneers of Polish heavy metal sound. Members: - Marek Piekarczyk - lead vocals - Stefan Machel - guitar - Janusz Niekrasz - bass guitar - Andrzej Nowak - guitar - Marek Kapłon - drums Former members: