The front baffles, plinths and mid-range driver housings for the Platinum series of loudspeakers are cast from ARC material, a thermo-set polymer loaded with minerals to provide very inert, optimally-damped components. Refined for Platinum by Monitor Audio’s engineers, this type of material is used for leading-edge automotive design and is ideal for acoustic applications where a high degree of structural rigidity and vibration damping is required.