Jack Ruby was a Jamaican record producer and sound system operator, best known for his 1970s productions of artists such as Burning Spear. He was based in Ocho Rios and during his time was the only major Jamaican record producer not headquartered in Kingston. He ran the Jack Ruby Hi Fi sound system and is considered one of the best roots reggae producers of the 1970s, having established a distinctive sound, noted for the unique use of horn arrangements. [more] https://en.wikipedia.org/wiki/Jack_Ruby_(music_producer)
Richie Unterberger, AllMusic Guide - Jack Ruby was an important reggae producer in the mid-'70s, noted for his use of horn arrangements in particular. His most outstanding credit is Burning Spear's Marcus Garvey album. He also worked with Big Youth, the Heptones, the Gaylads, and Justin Hinds, among numerous other acts. Suffering from ill health, he became less prolific in the 1980s, and died in 1989. A generous sampling of his work is available on the Heartbeat compilation Jack Ruby Presents the Black Foundation.
https://www.allmusic.com/artist/lawrence-jack-ruby-lindo-mn0000940574