Duophonic Ultra High Frequency Disks Limited (also known as Duophonic Records or Duophonic Super 45s) is a British independent record label formed by English-French rock band Stereolab in 1991. The label has two imprints: Duophonic Ultra High Frequency Disks for UK Stereolab releases licensed to various labels worldwide, and Duophonic Super 45s for releases of other artists and certain Stereolab UK-only releases. Duophonic's first release was Stereolab's debut EP Super 45 (1991), limited to 880 copies; of these, forty copies had handmade covers that were produced by Martin Pike in his father's garage.