Diapason writes: “The level of satisfaction provided by the Prelude I was great: an extremely pleasant listening experience, particularly with strings and baroque music. However, Alessandro began to feel the desire to improve further: he thus started a project that would expand the already notable prerogatives of the progenitor, identifying the power handling and the extension of the low range as areas of potential improvement.
He began to “play” with the form factor of the Prelude, keeping the base and height unchanged, but increasing the depth, in order to provide an adequate load volume to the chosen speaker, a 6.5” instead of 5”, the Seas P17 RCY / P. The increased volume made necessary to devise a stratagem in order to come up with gentle shapes: the idea of the facets was born, initially placed only in the upper part of the baffle and then extended to the lower part. However, it was not only the aesthetic aspect that guided Alessandro’s pencil, there was also the intuition that this solution would have drastically reduced diffractions, approximating the new project to an ideal point source.
It was decided to use solid chestnut wood, in order to proceed with subsequent realizations of the cabinet: the definitive version included a further increase in volume – in terms of depth – which was added on the back and was also faceted. Among the additional peculiarities of Adamantes I, it is worth mentioning the customized connectors with 24K gold-plated brass body, the Van den Hul internal wiring that – still today – accompanies every Diapason creation. In 1989 they were launched at the Top Audio in Milan and demonstrated by reproducing the original masters of the recordings made by Alessandro, a choice that gave value to a pillar of the Diapason philosophy: “you cannot effectively develop a loudspeaker without the experience of assiduous attendance of live music!”