OPTIMA No.6 24K GOLD STRINGS Carbon High Classical Guitar Strings SET OPTIMA No.6 24K GOLD STRINGS Carbon High OPTIMA No.6 – every concert guitarist must remember this name because these strings are a completely new dimension. Optima has left old patterns and old materials behind and simply reinvented the classical guitar string. The bass strings, made of a completely new core material, wound with either a 24K gold wrap or special silver, result in a string with an extremely fast response, a powerful tone that is very sustainable and rich in overtones. The sound spectrum remains completely balanced. The set is rounded off harmoniously by either Clear Nylon or the highly praised Natural Carbon treble strings. E1 - NO6.CHT1 - Natural Carbon H2 - NO6.CHT2 - Natural Carbon G3 - NO6.CHT3 - Na.