Six stacked loudspeakers form a spiral structure maintained in equilibrium by the magnetic attraction of the speakers themselves, organized as part of a serial sculpture. The speakers reproduce a 8Hz infrasound sine wave therefore inaudible to human ears, but visually perceptible only through the slow oscillation of the membrane: this undermines the very function of the sound object leaving the primacy to the optical / kinetic perception of sound waves. The 8Hz wave frequency has been chosen because it frequently occurs in nature and also has a significant value in music as the basic frequency of the natural harmonic scale.