Short answers, pulled from the story.
Osbourne Ruddock, known as King Tubby, was originally a radio repairman in Kingston, Jamaica during the late 1950s. He operated a small electrical repair shop on Drumalie Avenue where he honed his understanding of circuits and electronics before becoming a sound engineer.
King Tubby began working as a disc cutter for producer Duke Reid at Treasure Isle studios in 1968. This pivotal moment redefined the role of the sound engineer and allowed him to experiment with faders to create new music.
King Tubby used a built-in high-pass filter on the MCI mixer he had bought from Dynamic Studios to create the rockers rhythm. This filter was a parametric EQ controllable by a large knob known as the big knob which allowed him to introduce a dramatic narrowing sweep of any signal.
King Tubby built a new larger studio in the Waterhouse neighbourhood of Kingston in the 1980s. This studio became a sanctuary for musicians and producers and served as a community hub for the next generation of sound engineers.
King Tubby was shot dead on the 6th of February 1989 outside his home in Duhaney Park, Kingston. He was returning from a session at his Waterhouse studio when the robbery occurred.