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City of license Toronto, Ontario
Broadcast area Toronto, Ontario
Branding Boom 97.3
Slogan Toronto's Greatest Hits
Frequency 97.3 MHz (FM)
First air date 1987
Format Adult Hits
ERP 28,900 watts
Class C1
Callsign meaning C H BM (Boom)
Owner Astral Media
Webcast Listen Live
Website Boom 97.3

CHBM-FM is a radio station in Toronto, Ontario, Canada owned by Astral Media. It broadcasts an adult hits format at 97.3 FM and is branded as Boom 97.3, Toronto's Greatest Hits, with a playlist focus from the 1970s-1990s. Like most Toronto radio stations, this station transmits from the CN Tower with an ERP of 28,900 watts.

The time period of the music on the current playlist is roughly music released between 1964 and 1999 with a core focus on music released in the 1980s. The station also plays a song every few hours released between 2000 and 2005.



On December 26, 2009 at 9:00 a.m, after almost 15 years as an adult contemporary station, the station changed formats becoming an adult hits station with the branding Boom 97.3, Toronto's Greatest Hits, adopting the Boom FM branding used by some of Astral's small-market French-language stations in Quebec. This now puts itself in direct competiton with CING-FM, which became a classic hits station a month earlier in November 2009. There was no change in local airstaff after the format flip. This leaves CHFI-FM as the only adult contemporary station in the Toronto radio market. However, CKDX-FM could now be known as a direct competitor to that station. The call letters were changed on December 27, 2009 to CHBM-FM. Even after the station switched to adult hits, the "Boom 97.3" jingle sounds similar to that of Virgin Radio.

The first song played on Boom 97.3 was Don't Stop Believin' by Journey.

A similar situation happened in Vancouver on Boxing Day 2002, when Rogers Media's former adult contemporary station CKKS-FM flipped to adult hits as Jack FM and months later became CKLG-FM. Ratings increased on the Jack FM station whereas some former CKKS-FM listeners moved to rival CHQM-FM, currently the only adult contemporary station in Vancouver. During the first book of Boom 97.3, it debuted with a 9.3 share, slightly higher than what was 97.3 EZ Rock and one of the highest-rated books since 2005.


  • Humble Howard & Colleen Rusholme, hosts of the Boom Breakfast Show
  • Maie Pauts, weekday midday host/host of the Boom Brunch (Sunday mornings)
  • KJ, weekday afternoon drive time host/host of Studio 97 (Saturday evenings)
  • Troy McCallum, weekday evening host
  • Donny Osmond, weekday late night host
  • Stu Jeffries - host of weekend afternoons

Syndicated Shows:


Monday - Friday 5:30 a.m. boom Breakfast - Humble and Colleen 8:45 a.m. Maie Pauts 12 p.m. The boombox all request lunch - Maie Pauts 1 p.m. Maie Pauts 2 p.m. KJ 5 p.m. boom Retro Mix with KJ 7 p.m. Troy McCallum 10 p.m. Donny Osmond Saturday 6 a.m. Best of boom Breakfast 10 a.m. The 80's Show - Stu Jeffries and KCC 12 p.m. Stu Jeffries 5 p.m. Studio 97 Sunday 2 a.m. Donny Osmond 6 a.m. boom Brunch 10 a.m. The 80's Show - Stu Jeffries and KCC 12 p.m. Stu Jeffries 5 p.m. Best of boom Breakfast Show 9 p.m. Donny Osmond



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