Sony XS-W124ESNew ideas You want deep, rich bass. Sony's unique Mobile ES Series XS W122ES 12" sub uses proprietary materials and creative design to bring high performance bass to your ride and give you the gift of great sound. Into the cone zone The XS W124ES features a Mica Reinforced Cellular (MRC) cone, created for high rigidity, light weight, and good internal loss. This material combines a layer of mica flakes and paper pulp with a honeycomb shaped aramid