Mareco Broadcasting Network made its debut in the radio industry in March 1963. Its first AM station, DZLM 1430 kHz, originally served only as a promotional venue for Mareco's Mabuhay and Villar record brands. It also held the local license to produce and market foreign music labels from a peak of over a hundred major international recording companies. During this time, DZBM played the latest and widest variety of popular music and was consistent no. 1 in the surveys, contributing significantly in popularizing radio as a prime entertainment medium in Manila.
Crossover era
With its increasing listenership, DZBM was opened to commercial advertising. For superior quality, the station migrated from AM to the FM band and became known as DWLM at 105.1 MHz in 1973 as Super Tunog Pinoy 105.1 with an all-OPM format, later reformatted as Power 105BM FM in 1985 with a new wave format and changed its callsign to DWBM. In the early 1990s, MBN underwent several changes in management as well as programming with the launch of 105.1 Crossover in June 1994 with a smooth jazz format.
Expansion
MBN then realized its plans for expansion with the opening of 99.1 Crossover in Bacolod City on February 1997, 93.1 Crossover in Cebu on September of the same year, and 93.1 Crossover in Davao on June 1999, bringing the Crossover format to the southern area of the country. The Manila broadcast is now also heard live over 105.1 FM in Baguio City. The Crossover format is also webcast worldwide in real time on their official website.
20th anniversary
In June 2014, 105.1 Crossover celebrated its 20th year as a jazz and R&B station, with the theme "Celebrating 20 Years of Great Music." At the same time, the station's first disc jockey after almost a decade, Benjamin - formerly of 106.7 Dream FM and Citylite 88.3 - went on board.
Q105
On December 30, 2019, 105.1 FM silently dropped its Crossover brand and smooth jazz format and switched to Top 40 format, as Mareco opted to lease the station's airtime to Horizon of the Sun Commmunications. The station announced on the following day that the Crossover FM format has migrated online. Its Baguio relay station have also adopted the new format. While other MBN regional stations still broadcasts under the Crossover brand and format, they will soon follow suit with the Manila station under the same collaboration with Horizon of the Sun Commmunications. On January 13, 2020, the Q105 branding was launched. The management tapped former PBS deputy director general and former Quest Broadcasting executive Carlo Jose Magno Villo as the station's director, along with several DJs from government-run rival 87.5 FM1. It plays a similar playlist as FM1, in addition of K-pop, C-pop and Latin pop songs. It also airs daily news updates with reporting segments on local and international news, business, entertainment and lifestyle.
