OPTIMA No. 6 - every concert guitarist should remember the name of these strings, because they bring forth an entirely new dimension. Old patterns and materials were left behind and the classical guitar string was merely reinvented. The bass strings are made with a wholly new core material, wound with a 24 Karat Gold plated wire, resulting in a string with an extraordinary fast response, a powerful sustainable tone very rich in overtones, where the sound spectrum remains perfectly balanced. The set is completed with Clear Nylon treble strings.