Jamrud is a rock band from Indonesia was first formed in 1989 in Cimahi, West Java, Indonesia with the name of Jamrock. Conceptor Jamrud are 'Aziz' Mangasi Siagian (guitar) and 'Ricky' Teddy (bass) and is known as a successful music group carrying the rock as a popular music in Indonesia in the 90's. Before become to Jamrud, the early formation of Jamrock: 'Aziz' Mangasi Siagian (guitar), 'Ricky' Teddy (bass), Agus (drums) and Oppi (vocals). This group is several times through personnel changes