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WMRX-FM
Beaverton, Michigan;
Broadcast area	Central Michigan
Frequency	97.7 MHz
Branding	Sunny 97.7/107.7
Programming
Format	Classic hits
Ownership
Owner	Michael Chires and Norman McKee; (Black Diamond Broadcast Group, LLC);
Sister stations	WMPX
History
First air date	September 15, 1980 (as WGEO-FM)
Former call signs	WGEO-FM (December 3, 1979-December 14, 1983)
Technical information
Licensing authority	FCC
Facility ID	39674
Class	A
ERP	4,100 watts
HAAT	122 meters (400 ft)
Repeater(s)	1490 WMPX (Midland)
Links
Public license information	Public file; LMS;
Webcast	Listen Live
Website	www.sunny977fm.com

WMRX-FM (97.7 MHz) is a radio station licensed to Beaverton, Michigan in the United States, broadcasting a classic hits format. In January 2021, the station began branding as "Mid-Michigan's Favorite Hits". The station also is an affiliate of the Detroit Tigers Radio Network. Black Diamond Broadcasting is the owner of WMRX-FM.

WMRX history

Originally WGEO-FM,^[2] the station was purchased by Maines Broadcasting in December 1983 and became WMRX-FM. The station ran an automated adult contemporary format from 1983 through 1990. The music was a more contemporary version of the MOR format of sister station WMPX. In the summer of 1990, WMRX-FM became a direct simulcast of WMPX, and later in the year both stations became an affiliate of ABC Radio's "Star Station" adult contemporary format. Steel Broadcasting purchased the stations in 1992, retaining the "Star Station" format. In late 1994, the stations changed format to adult standards and were branded as "Unforgettable" airing ABC's "Stardust" format to great success. The stations stayed with ABC as the format morphed into "Timeless Favorites" in the early 2000s. In 2010, when ABC dropped the "Timeless" format, the stations became an affiliate of Dial Global's "America's Best Music" adult standards format. In January 2014, the stations dropped the satellite format and became "Sunny 97-7" airing a soft gold format. By 2017, competitor WHNN had changed format to AC, and the simulcast with WMPX shifted to classic hits, while retaining the Sunny brand, with a new logo.

In 2019, WMRX-FM broke simulcast with WMPX, as WMPX added a translator on 107.7 and became Country Gold "107.7 The Highway" featuring a 1990s-based classic country format. The station was branded as "Country's Greatest Hits".

On July 1, 2023, WMRX-FM brought back the simulcast with WMPX and rebranded as "Sunny 97.7/107.7".^[3]

Effective October 17, 2023, Black Diamond Broadcasting acquired WMRX-FM, WMPX, and translator W299CK from Steel Broadcasting for $100,000.