DZBB-AM 594 kHz Metro Manila is a Flagship AM stations of GMA Network The station studio is located at GMA Network Center DZBB (pronounced DZ-double-B) (594 kHz AM) - broadcasting as GMA Super Radyo DZBB 594 is a 24/7 news/talkradio station based in Diliman, Quezon City, Philippines, aimed at the Mega Manila market. It is the flagship station of the Super Radyo Stations. Apart of GMA News and Public Affairs, the news division owned by the Radio GMA Network Inc. (RGMA, a subsidiary of GMA Network Inc.) The station's studio is located at the GMA Network Center, EDSA corner Timog Avenue, Diliman, Quezon City, while its transmitter is located at Barangay Panghulo, Obando, Bulacan.At present, Super Radyo DZBB 594 is considered as one of the top stations in the AM band in Metro Manila and is recognized as one of the most awarded radio stations in the Philippines. DZBB was established on March 1, 1950 by Robert "Uncle Bob" Stewart, in a small office space in Calvo Building, Escolta, Manila with mostly second-hand equipment and an old, surplus radio transmitter. The station was then broadcasting on the frequency of 580 kilocycles. Despite of scarcity of new broadcasting facilities, the station has scored many milestones with its news, senate and congress coverage, breaking news, exclusives, and blow-by-blow accounts of major national events. It also pioneered on trendsetting shows such as Camay Theater of the Air, Lovingly Yours, Helen, Kahapon Lamang, Tawag ng Tanghalan, Newscoop, Kwentong Kutsero and others. Some of these shows eventually went to television. DZBB was also the first to air several live coverage extended not just to news and public affairs, but also to entertainment and educational programs. In 1957, DZBB moved to the new and current home at EDSA, Quezon City.Due to the success of DZBB, Stewart ventured to television on October 29, 1961 as DZBB-TV Channel 7 with the branding RBS-7 (now known as GMA-7 Manila). The station seized and closed in September 1972 due to Martial Law. Two years later, Channel 7, DZBB and other provincial radio and television stations were eventually sold to the triumvirate of Gilberto Duavit, Sr., Menardo Jimenez and Felipe Gozon. At the same time, DZBB returned to the airwaves under the branding Dobol B, and was a full service radio station with news, music and entertainment programming. In 1979, DZBB moved to the present frequency of 594 kHz, in response to the adoption of the 9 kHz spacing on AM radio stations in the Philippines.The station was known as "Bisig Bayan" in July 17, 1989 to January 3, 1999. Their new identity made the station more popular to radio listeners in Metro Manila. Rafael "Paeng" Yabut, Bobby Guanzon, Lito Villarosa, Rene Jose, Rey Pacheco, Raul Virtudazo, Jimmy Gil, Arman Roque, Rose "Manang Rose" Clores, German Moreno, Inday Badiday and Helen Vela were the personalities of the "Bisig Bayan" format.It was also in the early 1990s when DZBB came out with "Kape at Balita", a morning news/commentary/talk show hosted by Bobby Guanzon and then GMA News reporterJessica Soho.In January 4, 1999, the station was renamed "Super Radyo DZBB 594" and much of their programming focuses on news and current events and now it still simulcast GMA & GMA News TV programs such as 24 Oras, Saksi, Balitanghali, Startalk and others.In 2010, for the first time in Philippine radio history, DZBB and its rival station DZMM of ABS-CBN made a historical simulcast when they had two children named James and Jesus, asked for help to find the missing parents named Pascual and Norma Bantillan from Bohol on a rival program on DZMM Aksyon Ngayon Global Patrol and eventually reunited through DZBB's program Aksyon Oro Mismo.In 2014, Super Radyo DZBB, GMA Network's flagship radio station, kept its winning streak in Mega Manila as it continued to lead rival stations in ratings, according to data from Nielsen Media Research. DZBB grabbed the lead in Mega Manila in June 2014 and has since sustained leadership in the area. List of programs broadcast by DZBBDZBB's programs are mostly news, current issues, and news analysis produced by GMA News and Public Affairs department. Their morning radio shows were anchored mostly by news anchors and personalities from television. Musical programs are also aired during weekday afternoons (1:00-2:00pm),Super Kuyang (3-4am), Kahapon Lamang (weekends, 1:00-2:00pm), Harana Na Balita Pa (Saturady-Sundays at 9-10pm) and Dis Is Manolo (weekend editions).The station also has a newscast entitled "Super Balita", four times during the day; morning, noon, (both aired nationwide in all Super Radyo stations in the Philippines during weekdays), afternoon and evening. They also simulcast news and public affairs programs of GMA Network such as 24 Oras, the network's primetime news program.In some occasions, DZBB would also air live blow-by-blow boxing coverages especially during Manny Pacquiao's fights (alongside Barangay LS 97.1 and Radio GMA AM and FM stations nationwide) and other major boxing fights (dubbed as Laban ng Lahi), as such, DZBB became the first radio station to do so.