The structure of ZEF MAX Speaker Cable consists of a central core made of OCC copper (extremely pure single crystal copper) surrounded by multiple strands of solid silver-plated Ultra Cast OFC copper. The advantage is that it offers excellent conductivity over a very large bandwidth. To guarantee the purest possible signal and prevent any kind of distortion due to electrostatic interference, ZEF MODULATION, ZEF MAX and ZEF SPEAKER cables are insulated with Fluoropolymer.