Defective-Effective) were a Serbian new wave/punk rock band from Belgrade, notable as the participant of the Artistička Radna Akcija project in 1981.
The band was formed by Urbana Gerila 13-year-old guitarist Slobodan Nešović "Loka", with the bassist Branko Petrović "Bane" and drummer Dejan Ignjatović.
He was also the member of Radost Evrope (which later evolved to Toni Montano and his backing band), and San Vila, which was influenced by Paul Weller's works, but lasted for a short period of time (1986–1987).
He was also working in studio and played a guitar on a few concerts with his former bandmate from Berliner Strasse Petar Ilić "Cirilo" in a short lived band Bourbon B.
The song "A" appeared on the Serbian bootleg record label Cheerokie Sound various artists compilation Yugoslavia punk 1977-1991.