• Early JMI Supremes

    Serial nos 1001 - c.1200

  • Serial number 1121

    August 1967

  • Later JMI Supremes

    Serial nos c.1200 - 1600

  • Vox Sound Equipment Ltd

    Serial nos 2000 - c.2190

  • Vox Sound Equipment Ltd

    Serial nos 2190 - c.2340

  • Serial no. 2231

    November 1969

  • Vox Sound Ltd (VSL)

    Serial nos c.2340 - 2600

  • Footswitch

    1967 - 1972

  • Circuit diagrams (schematics)

  • How it works, 1969

    Explained by Vox (VSEL)

  • Lemark Transformers

    VSEL and VSL

  • The RCA 2N3055 transistor

  • Heslop cabinets