Complex sentence: They concluded that many people were disuaded by the name "jazz", and as a result, 100.4 Jazz FM closed on 13 February 2004 and relaunched as Smooth FM on 1 March 2004.
Split into simpler sentences: They concluded that many people were put off by the name "jazz" in the station name. As a result, 100.4 Jazz FM closed on 13 February 2004 and relaunched as Smooth FM on 1 March 2004.