DZRJ-AM (810 kHz Metro Manila) is an AM radio station of the Rajah Broadcasting Network, Inc. in Manila’s National Capital Region, Philippines, owned by guitarist-singer-businessman Ramon Jacinto. The station was located on the roofdeck and tower of the J&T Building along Ramon Magsaysay Boulevard (a street is otherwise known as “Sta.Mesa”). Its present location is at the Ventures Building-1, General Luna Street, Makati 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 “Rock Jocks”, became celebrities in Manila’s counterculture.