DZAK-FM

DZAK-FM (91.1 FM), broadcasting as Rock 91.1, is a music FM radio station owned and operated by ViacomCBS Networks Philippines. The station's studios are located at GS Media Tower, Corner of Urban Avenue &, San Lorenzo, ; while it's transmitter is located at GSTV SuperTower, Hippodromo, Carmona, Makati City, sharing the site with sister stations DWGS-FM (O-Chan 108.5), DZGX-AM (GS News Station 999), DZKN-FM ( 105.3), DZRO-FM (102.3 ) and DZGO-FM (GO! 107.3). Sister station DZMX-FM (Mix FM 101.3) has a separate transmitter at Clark FM Hill in, but has a booster at GSTV SuperTower.

DZAK-FM is the most-listened-to hard rock station in and is popular with teenagers and young adults, as well as American, British and Canadian expatriates.

The station is the home of Mornings with Uncle Twinx hosted by DJ Griffin "Uncle Twinx" Felix and Gabi ng Rock!!! hosted by Saburo Tomilloso and Synthia Abella.

"Money for Nothing" complaint
In July 2017, the (NTC) admonished DZAK-FM and GS Media Network for playing the unedited version of Dire Straits' Money for Nothing, following a complaint from a listener in  over the usage of a slur for homosexual persons in the lyrics for the song. Even though the song has won numerous awards and has been played countless times on radio around the world, the NTC felt that the unedited version has become unacceptable for airplay. In response, (ABS-CBN MOR 101.9) and  (Jam 88.3) played the unedited version of Money for Nothing repeatedly for the entire day of July 22 out of protest. did interviews with ABS-CBN TV Patrol and Pinoy World regarding the debacle, criticizing the NTC for not understanding that the lyrics were sung from the point of view of a character and that they did not reflect his personal views. The NTC rescinded their ruling on August 1.