Francesco Fuzz Brasini Sevenguitars is a project born from the idea of interaction between sound and space. The project features seven guitars, seemingly identical but technically conceived to produce distinctive characteristics: the seven instruments have been designed and handcrafted with a tonal chamber inside the solid body which interacts with the string's harmonic vibrations creating different sound effects. Every guitar is connected to a valve-amplifier each of witch is equipped with distinctive speakers and different power. The amps are used at the maximum volume and tone. This creates a feedback effect with the guitars: the strings go in auto-oscillation creating different harmonics depending on the instrument and the tuning, and reacting with the acoustic features of the performative environment. The musician loses, therefore, the role of executor and becomes only the creator of a process open to unpredictable results and closely related to the spatial contest of the performance. Every place, every contest, becomes an important variable able to influence the result: the sound, therefore, is more linked to the spatial dimension rather than to the temporal one with which the music is traditionally associated.