he chord is one of the foundations of music, essential for the tuning of a musical instrument. If we consider a large orchestra, a single instrument or a piece of music, without preconceptions, there is a chord at the base of it all. Voicing a speaker involves the tuning and harmonising of the different parts into something uniquely expressive and coherent: from the drivers to the crossover parts, from the cabinet to its support, the singularity of each element blends into a whole, a presence capable of giving to listeners the “quality of illusion”.