The sound system concept first became popular in the 1950s, in the ghettos of Kingston. DJs would load up a truck with a generator, turntables, and huge speakers and set up street parties. In the beginning, the DJs played American rhythm and blues music, but as time progressed and more local music was created, the sound migrated to a local flavor.
The sound systems were big business, and represented one of the few sure ways to make money in the unstable economy of the area. The promoter (the DJ) would make his profit by charging a minimal admission, and selling food and alcohol. It was not uncommon for thousands of people to be in attendance. By the mid 1950s, sound systems had eclipsed live musicians in any combination for the purpose of staging parties. By the second half of the decade, custom-built systems began to appear from the workshops of specialists such as Headley Jones, who constructed wardrobe-sized speaker cabinets known as "House[s] of Joy". It was also around this time that Jamaica's first superstar DJ and MC, Count Machuki (b. Winston Cooper) rose to prominence.
As time progressed, sound systems became louder—capable of playing bass frequencies at 30,000 watts or more, with similar wattage attainable at the mid-range and high frequencies—and far more complex than their predecessors, record players with a single extension speaker. Competition between these sound systems was fierce, and eventually two DJs emerged as the stars of the scene: Clement 'Coxsone' Dodd, and Duke Reid. The popularity of a sound system was mainly contingent on one thing: having new music. In order to circumvent the release cycle of the American record labels, the two sound system superstars turned to record production. Initially, they produced only singles for their own sound systems, known as "Exclusives" or Dubplates - a limited run of one copy per song.What began as an attempt to copy the American R&B sound using local musicians evolved into a uniquely Jamaican musical genre: ska.
