Classic Series - The Original! The Classic series encompasses flexible tin plated, multi-strand, oxygen-free 5N purity Copper! In addition to the corrosion resistance, the tin plating contributes also to a much wanted skin-effect reduction and prevents the electrons (i.e. the current) from disruptive ”jumps” between the strand surfaces, hence adding unwanted timing errors to the music signal. The insulation of a select grade chemically stable PVC further improving the sonically benign tin surface over time. The Classic cables are available also in a flame retardant and halogen free version; Classic/H FRHF. The Classic series is according to todays measures good entry level cables and are available in dimensions suitable for a wide range of power transmission demands. Compared to any low cost hifi-kits included speaker cables, Supra Classic will give a clearly audible improvement.