DZRJ-AM (810 AM), also known by its tagline The Voice of the Philippines, is an AM radio station of the Rajah Broadcasting Network, Inc. in the Philippines. Its present studio location is at the Ventures Building-1, General Luna Street, Poblacion, Makati City, and Unit 404 Seneca Plaza Building, E. Rodriguez Sr. Avenue, New Manila, Quezon City. while its radio transmitter is located along Quirino Highway, Novaliches, Quezon City.
DZRJ-AM was originally found in the broadcast frequency of 780 kilohertz on the AM band. It carried the tagline, "DzRJ: Boss Radio", which later evolved into "DzRJ, The Rock of Manila" as it hosted a daily show called "Pinoy Rock 'n' Rhythm" (later shortened to "Pinoy Rock"), which was conceived by DzRJ's original station manager, Alan Austria ("Double-A") and its program director, Emil Quinto ("Charlie Brown"). DzRJ's radio personalities, the "Bossmen", then the "RockJocks", became celebrities in Manila's counterculture.
The daily Pinoy Rock 'n' Rhythm radio show, which was hosted by Bob Posas ("Bob Magoo") and, later, by Dante David ("Howlin' Dave"), featured the early vinyl releases of pioneering Filipino rock groups such as RJ and the Riots', the Juan Dela Cruz Band and Anakbayan, as well as submissions (on cassette tapes) of recordings from Manila's unsigned bands and independent artists. The earliest contributions were from groups such as Maria Cafra ("Kamusta Mga Kaibigan"), Petrified Anthem ("Drinking Wine"), Destiny ("A Taste Of Honey"), and a fledgling Apolinario Mabini Hiking Society.