Polyglass technology, exclusive to Focal, consists in applying molten glass microballs on a cellulose pulp cone. This process combines an excellent paper damping with glass rigidity. The rigidity index exceeds even that of a single skin Kevlar® and is almost ten times superior to one of polypropylene.
The mass/rigidity/damping ratio adjustment results in outstanding linearity of the frequency response curve, all from the inherent design of the cone. This innovation also greatly increases definition in the midrange.
This crossover combines the advantages of a tailored crossover with 4480 adjustment points for greater flexibility and precise tuning. The highest quality components inside this crossover fully reflect the Utopia Be approach and its goal of exceptional musicality, no matter what difficulties the vehicle’s interior may present.
“W” Composite Sandwich Cone
The “W” composite sandwich cone permits total optimization of the frequency response curve, thanks to the total control of three key parameters: lightness, rigidity and damping. At Focal, the letter “W” means Glass/ Glass, as it usually has two sheets of woven glass tissue that are “sandwiched” onto the structural foam core. The glass tissue benefits from the incredibly fine weaving of very long fibres. This choice offers a mass and a size clearly inferior to those in Aramid fibers or other Kevlar® fabrics, which generate coloration in the midrange. It’s also important to note that the molecular bond between the resin and the glass is greater than that obtained with Aramid fibres. The cone structure is more homogeneous and its behavior in flex is much more superior.
These unique characteristics of lightness and rigidity provide control of the signal transmission speed inside the material. Adjusting the thickness of the structural foam allows a very precise control of the “W” cone’s damping. The variation of the number of glass fibre sheets and the thickness of the central foam can easily optimize the cone’s behaviour according to the desired frequency range.When listening, the sound of the “W” cone is entirely transparent, has an excellent phase response and has a very low disortion rate (rigidity 20 times higher than Kevlar® or Aramid fibre).
Direct Fet® technology optimises the amplifier’s heat management. This technology helps reduce the overall temperature of the MOSFET components, thanks to the optimisation of their electrical and thermal resistance. Actually, everything takes place in the casing of the component: thanks to a specific design, heat is dissipated via the aluminium heat sink and also via the chassis. This gives the advantage of obtaining more power in a confined space, making it possible to combine integration and sound quality.
The use of low-noise operational amplifiers considerably reduces distortion. To be more specific, this means increased musicality and enhanced precision.