Arena Metasonic
Grande Sonnerie watches are a long-established speciality at Gérald Genta. It has introduced a number of exceptionally complex wristwatch models since 1994. With their four hammers and their Westminster chime playing a different tune for each quarter, they represent 15 years of peerless accomplishments and are all the more remarkable in that they are developed on tourbillon movements.
The Grande Sonnerie models comprise approximately 850 parts for the hand-wound models, 950 for the self-winding versions, and 1,100 for those equipped with a perpetual calendar. It takes around a year’s work to craft just one such watch, and only 61 in all have emerged from the Gérald Genta workshops since 1994.
The key assets of the Arena Metasonic
Having reached the peak of its art in mastering its Grande Sonnerie mechanism, Gérald Genta wished to provide it with a tailor-made case specifically developed to exalt its musicality. To achieve this, it cooperated with a French university in developing a software programme capable of analysing all kinds of materials. Gérald Genta has thereby created a testing system that evaluates a given material’s density, elasticity modulus and loss coefficient, a set of crucial physical parameters that determine the quality of the sound transmission and must be as low as possible.
Based on the objectives defined for each parameter, Gérald Genta decided to target excellence by creating an alloy of which the composition will remain a closely guarded secret. Duly patented under the name Magsonic®, it displays winning performances with a density of 2.7 g/cm3, an elastic modulus of 71 Gpa and a sound transmission loss coefficient of 0.00008 – meaning respectively 50%, 30% and 60% better than the parameters that were set as objectives. This material is therefore used for the case middle of the brand’s latest Grande Sonnerie model, the Arena Metasonic.
In addition to the major role played by the Magsonic alloy, this new model also features an original case based on a patented construction inspired by the side drums in a drum kit. The case middle is framed on either side by a bezel and back in grade 5 titanium secured from outside by means of specially designed pillars. This means the sound diffusion is undisturbed by any screws, and results in a highly original creation entirely in tune with the spectacular design characteristic of Gérald Genta models.
The entire construction has also been rendered water resistant, because contrary to popular belief, nonwatertight watches do not emit a better sound. The latter can even be perturbed by being forced through the bottlenecks created by the passage of air around the winding pushers.
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