The SUPRA Classic series comprises highly flexible cables containing tin plated multi-stranded OFC copper of purity degree 5N, which means >99.999% pure, i.e. purer than five nines. The insulation is a special ion stable PVC which minimizes corrosion of the sonically benign tin surface. The tin contributes to a better sound quality by minimizing the skin-effect and making less current jumps between the wire surfaces.
The Classic 1.6 is a good choice for loudspeaker internal wiring.
Ice Blue heat & aging resistant PVC jacket