In 2005, the group began performing with major, foreign groups. In June, they played with Aviador Dro, perhaps the most important Spanish electronic group. In December, Theremyn_4 played with the Argentinian electro pop band Entre Ríos. At the same time, the group continued with their national tour in Peru, around Cuzco, Trujillo and La Oroya. After the tour, in September 2006, the group released their 5th album,"Spacetimebomb." This was the first time Theremyn_4 collaborated with other Peruvian musicians and Argentinian musician, Gabriel Lucena (an ex-member of Entre Rios). The Peruvian musicians involved were: Paco Holguin (Emergency Blanket), Carlos Vasquez (Unidad Central), Bruno Macher (Sabor y Control) and Jason Fashe. The sound of this album shows how Theremyn_4 was able to step away from breakbeats and jazz, and step into acid house and techno. Tracks like "Rocknho," "El Futuro Buda," "Lo-fi gen" and "Supercontexto," are all proof of this transition. The idea for the visual imagery for the album was based on the graphic novel entitled, "The Invisibles," by Scottish writer, Grant Morrison.