[2][3][4][5] The band's members were: Rosano (El Assassin) and Tina Martinez (who were brother and sister), MC Kode Blue and Vlad DJ BTL.
Later in 1989 they became a dance, hip hop and pop group, Sound Unlimited Posse, with the line-up of Rosano "El Assassin" Martinez as rapper, Vladimir "DJ B.L.T."
[7][9] Also in that year they supported the Australian leg of tours by visiting international artists, Public Enemy, De La Soul and New Kids on the Block.
A Postcard from the Edge of the Underside was the only Australian rap album to be released by a major label (Columbia Sony) in the 1990s.
[13][14] Those suburbs have residents, who are "traditionally regarded as real people, working-class, underprivileged and crime-ridden," and have substantial immigrant communities.
For the first time Sound Unlimited appeared with other key artists of the genre such as the AKA Brothers, Koolism, Def Wish Cast and Hilltop Hoods.