The Platinum3 and Sonata3 models use a modified four piece OTL cantilever technology achieving a 10% tip mass reduction over the Prestige series and ultra-high purity long crystal (UHPLC) oxygen free copper wire in the coils. The Platinum3 model uses Grado’s specially designed elliptical diamond, and the Sonata3 model uses Grado’s specially designed nude elliptical diamond.