 He had previously been a member of the Bamboos (1986–87) and Kryptonics (1987–88).He established a record label, Reverberation, in 2003 with his former Kryptonics bandmate, Ian Underwood.Early in 1981 in Perth, Hopkinson was the lead vocalist and guitarist for Circle A, which included Don Burr on lead guitar and the Tarrant brothers