replicate the American R&B sound using local musicians evolved into a uniquely Jamaican musical genre: ska. This shift was due partly to the fact that as American-style R&B was embraced by a largely white, teenage audience and evolved into rock and roll, sound system owners created—and played—a steady stream of the singles the people preferred: fast-shuffle boogies and ballads. In response to this shift in supply, Jamaican producers introduced to their work some of the original elements of the Jamaican sound: rhythm guitars strumming the offbeat and snare-drum emphasis on the third beat, for example. As this new musical form became more popular, both Dodd and Reid began to move more seriously into music production. Coxsone Dodd's production studio became the famous Studio One, while Duke Reid founded Treasure Isle. As sound systems continued to gain in popularity through the 1960s and 1970s, they became politicized in many instances. The DJs would often satirize current affairs and local events, taking on a “singing newspaper” role. Many sound systems, and their owners, were labelled as supporters of a particular political party (such as the PNP or the JLP), but most of the sound systems tried to maintain political neutrality. Nevertheless, as a cultural and economic phenomenon, the sound system was affected by the vast socio-political changes taking place in Jamaica at this time. An important part of sound system culture is the sound clash, an organized battle between two systems. The Guinness Sounds of Greatness is one of many such clashes. In 2009, the Guinness clash was organized into three parts: a "juggling" round, where each system gets 15 minutes to get the crowd going; a "tune fe tune" exchange of "commercial releases"; and a "dub-fe-dub", when the systems alternate "specials done specifically for the sound system playing the recording". The culture of the Sound System was brought to the UK with the mass immigration of Jamaicans in the 1960s and 1970s. Notable UK Sound Systems include Sir Coxsone Outernational, Jah Shaka, Channel One, Aba Shanti-I, Jah Observer, Quaker City, Iration Steppas, Fatman International and Saxon Studio International. One of the first sound systems in the United States was Downbeat the Ruler, founded in Bronx, New York, in the late 1970s. These sound systems were the method in which these migrants were able to maintain their cultural connection with their roots. They broadcast the remixed samples of reggae beats and created