Optima No.6 GMT4 Single gold wound 4th medium tension.

This name every concert guitarist has to remember, because these strings are a completely new dimension. We have left behind old patterns and old materials and have simply invented the classical guitar string again. The bass strings, made of a completely new core material, wound with our Special Silver wrapping, result in a string with an extremely fast response and a powerful tone that is sustainable and very rich in overtones, whereby the sound spectrum remains perfectly balanced. The set is completed with either our Clear Nylon, or our highly praised Natural Carbon treble strings.