CKMF FM

Early station years (1964–1970)

Originally known as CJMS-FM, the station started operations on May 11, 1964, as a sister station to the now-defunct CJMS 1280. Upon its opening, CJMS-FM was owned by the Radiomutuel Group. The station originally had a classical music format; that format was abandoned in 1970 and the call sign was changed at that time to CKMF-FM.

Early CKMF years (1970–1994)

The station moved in 1972 from its original facility at the corner of Berri Street and Ontario Street East to relocate to the corner of Roy Street East and Hotel de Ville Avenue in the Plateau.

The station became Canada's first radio station with a disco music dedicated segment in November 1978 (although Broadcaster's Yearbook had listed the station's full-time format as Disco). Because of Canadian Radio-television and Telecommunications Commission (CRTC) rules and the fact that CKMF is a French-language station, it was required to play mostly French-language over English-language music, therefore English songs (mostly the disco tracks) were spread thinly across the broadcast schedule.The pioneer who actually spinned disco music for the very first time on Montreal Fm Radio,was Robert (Bob) Ostiguy during his Saturday night show Style libre (Free style) on CKMF FM,1974 to 1976, dedicated to music that made people dance.Later on,Michel Trahan began slowly include disco music during his daily return home show."Le 5 à 8" became the most popular show between 1978 and 1986, because they concentrated their CRTC quota of English and International music (mostly disco) between the hours of 5-8PM. "Le 5 à 8" was hosted by Michel Jasmin and Alain Tanguay, and later on by Alain Montpetit and Guy Aubry, featuring the talent of the best DJ's in Montreal like François L'Herbier, Alain Bourque, Big Dan Moreau and Michel Cadoch doing shows like "Live from the Limelight" and other famous clubs in Montreal, along with programs like "Le Show A Mario" with Mario Lirette and DJ Michel Cadoch, gave CKMF 94.3 that unique sound for the Disco era. One of the station's biggest on-air personalities of the disco era was the openly gay Douglas Coco Leopold, one of whose trademarks was his local trendsetting lists of who and what was "in" and "out" of fashion.

As was fictionalised in the 2010 Canadian film Funkytown, Montpetit's popularity as an influential DJ and promoter would be tarnished by being named as the prime suspect in a 1982 murder of a model in New York City (which would not be confirmed until 2002), and would prompt Leopold to criticize fellow airstaffer Montpetit on air publicly. Montpetit would later die in a Washington, DC hotel of a drug overdose in 1987, just several months after station management fired him after he showed up drunk and appeared too incoherent to do an airshift.

Radio Énergie and the Astral takeover (1994–2009)

The station relocated for a final time in 1983 to its current building at the corner of René Lévesque Boulevard East (then named Dorchester Boulevard) and Papineau Avenue.

It was from there that the Énergie name came to be as the station carried it over from its evolution from Rhythmic Top 40 in the 1980s and 1990s, to its current format which began in 1994. In January 2000, Astral Media acquired the assets of Radiomutuel including CKMF.

While a power increase to 75,000 watts was planned around 2000 to combat expected interference from the power increase of fourth-adjacent CBF-FM 95.1 from 17,030 to 100,000 watts, it never took place and was not even applied for, as the expected interference never took place. However this plan was notified internationally even though it was never implemented, which explains the United States Federal Communications Commission's FM query erroneous claims that CKMF-FM has a power of 75,000 watts.

From Énergie to NRJ and back again (2009-present)

The Énergie branding was discarded in August 2009 when Astral Media licensed the NRJ branding from a European broadcaster. The last song under the Énergie branding was Pictures Of You by The Last Goodnight, seguing to the station's morning show as the station relaunched as NRJ at 6am ET. The first song under the NRJ branding was Beggin' by Madcon.

In 2010, the station became the French-language radio flagship of the Montreal Alouettes (CFL football). The contract was supposed to last until 2013 inclusively; while both parties were apparently satisfied immediately after the end of the 2010 season, the contract was later terminated and the Alouettes returned to CKAC in time for the 2011 season.

With the merger of Astral and Bell Media on July 5, 2013, CKMF (as well as all "NRJ" stations in Quebec) is now owned by Bell Media.

By 2011, CKMF began moving away from Top 40/CHR to Adult Top 40 with an emphasis on modern adult contemporary material, which would later evolve into a straight-ahead modern rock presentation by late 2014.

Due to its high cost, Bell Media didn't renew the NRJ branding, and on August 24, 2015, all of their "NRJ" stations were rebranded back to the "Énergie" moniker; CKMF would follow suit as well. However, CKMF continued the modern rock format, whereas the other "Énergie" stations remain Top 40/CHR.

In March 2016, CKMF shifted to Hot AC, while retaining the "Énergie" branding, but by July 2016, it would return to Top 40/CHR, putting it in line with the Énergie stations in Quebec.