The band started up with Hugo Flores (Electric guitar) and Karloz Melendez (Acoustic guitar/singer). These two guys started to play with chords, rythms, thoughts and feelings until they made a solid idea in 2003 for the original material. In the year 2004, Karloz met Adrian Amaya (Drums), whom already knew Roberto Mendez (keyboards). The band started working on the original songs at the very last months in 2005, and they worked with the ideas that Karloz and Hugo built along the way. Unfortunately the band never had a bassist, but in the middle of 2006, Acustica got a new band member. Rafael Guzman (Bass), who took the four strings as his instrument in the band. The band released their first demo album titled: ÂVacio Existencial (Existential emptiness)Â. Acustica experienced a changed on their line-up as Alfonso Arevalo replaced Guzman and became the new bassist of the band on 2007.