DXMR-FM

DXMR (99.9 FM), broadcasting as 99.9 Magnum Radio, is a radio station owned and operated by Hypersonic Broadcasting Center. The station's studio is located at the Magnum Broadcast Center, 2nd floor, SBS Bldg., C.M. Recto Ave., Cagayan de Oro, while the transmitter is located along Osmeña St., Cagayan de Oro. 99.9 Magnum Radio operates 24 hours a day.
History.
1979–2002: 99.9 RK.
The station was launched on December 26, 1979 as 99.9 RK with the call letters DXRK. It was formerly owned by P.N. Roa Broadcasting System of then-Mayor Pedro "Oloy" N. Roa. The station carried slogan "The Rhythm of the City" (inherited from 99.5 RT in Manila (now 99.5 Play FM) and Y101 Cebu) and aired a Top 40 format.
Originally operating 24 hours a day, on February 3, 1997, it limited its daily broadcast from 8:00 AM to 12:00 MN.
99.9 RK ceased broadcasting on December 31, 2002 after 23 years of broadcasting.
2003–2010: Bay Radio.
On January 27, 2003, Baycomms Broadcasting Corporation acquired the station and changed its call letters to DXBD. On February 24, 2003, it was relaunched as 99.9 Bay Radio and carried a mass-based format. It initially operates from 5:00 AM to 12:00 MN. At that time, its studios and transmitter were located at J.R. Borja St. In 2008, its changed its callsign back to DXRK. On March 2, 2009 to March 28, 2010, Bay Radio began broadcasting 24 hours a day.
After 7 years of broadcasting, 99.9 Bay Radio signed off for the last time on December 25, 2010. During that time, the station was sold to Hypersonic Broadcasting Center, and its studios moved to its present location at 2nd floor, SBS Building, C.M. Recto Ave. and transmitter moved to its present location at Osmeña St.
2011–present: Magnum Radio.
On February 28, 2011, after a series of test broadcast, the station was relaunched as Magnum Radio, with the call letters DXMR, and switched to a hybrid of news/talk and music format, similar to 89.5 Brigada News FM in General Santos.
Originally operating daily from 4:00 AM to 12:00 MN, since October 1, 2012, it broadcasts 24 hours a day.
Magnum Radio has been ranked as the overall #1 FM station in Cagayan de Oro, according to the KBP-Radio Research Council (RRC) Kantar Media Radio Surveys.