DZSO (DZSO AM 720 kHz San Fernando City) is an AM radio station of the Newsounds Broadcasting Network Inc., in cooperation with Bombo Radyo Philippines. The station's studio and transmitter are located at Bombo Radyo Broadcast Center, Pennsylvania Avenue, Parian, San Fernando City, La Union, Philippines. Bombo Radyo La Union provides news, public service, drama, and music for the audiences of La Union, and the nearby provinces like Ilocos Sur, Pangasinan, and Benguet.