[2] The station received CRTC approval on June 9, 2004 [3] and was launched on 99.5 FM on November 25, 2004, at 80 Hunter St. East by King's Kids Promotions Outreach Ministries with a christian format including talk and music.
The station, plus previous and current ownership of the tower site at 1001 Talwood Drive were not able to resolve differences[citation needed].
[6] CJMB-FM began testing their new signal broadcasting on 90.5 MHz on October 14, 2010, at 4:05 PM, featuring the song "Stronger" by Hillsong Worship.
Under its ownership, CJMB flipped to talk radio as Extra 90.5, carrying a mix of local news and information programming, as well as sports talk programs (including The Regulars—a local program hosted by veteran Canadian sportscaster John Badham,[8] and CBS Sports Radio's The Jim Rome Show and John Feinstein), and coverage of the Peterborough Lakers alongside existing play-by-play for the Petes, Maple Leafs and Blue Jays.
It cited that uncertainties due to the impact of the COVID-19 pandemic on sports were the main impetus for the format change, and that lifting the restriction would allow it to more effectively compete with the other commercial stations in the market (which benefit from stronger signals and vertical integration).
In August 2023, the CRTC renewed CJMB's license, and removed the condition of service requiring that it broadcast a specialty format.