 The reason was postulated that student listeners did not carry personal radios, could not receive the signal in their cars off campus, and only a limited number had personal computers.In the spring of 2006, KUCO rebranded itself as Z-100 and flipped from alternative rock (Z-99) to a more student friendly CHR format geared towards 18 to 25-year-old students.Automation allowed students to produce and record content that could be played 24 hours a day.