Colorsound is an effects and amplifier brand of Macaris Musical Instruments. In 1964 Larry and Joe Macari founded Sola Sounds Limited to develop a range of products made for and sold by the Macaris Musical Exchange shops, as well for distribution nationwide. The product range started with fuzz and effect pedals, but later grew to include amplifiers, mixers, spring reverbs, and microphones. The Macaris established the Colorsound brand in 1967. Larry and Joe Macari opened a factory to make Colorsound effects pedals and each type came in a different, brightly coloured enclosure.
Source: The Tone Bender Timeline (10 November 2018)
Source: Macaris website (10 November 2018)