The sheep gut core of the Passione strings is manufactured, wound and polished in the traditional way, by hand. Passione strings possess a fascinating diversity of sounds, which allows musicians to alter their tone as desired. The core sound is full, round and warm and has a complex overtone spectrum causing brilliance and clarity and a great power of projection. big and powerful tone easy response Significantly reduced playing-in time: Passione strings are immediately playable other than traditional gut strings. significantly increased tuning stability vs. traditional gut core strings well-balanced set harmony Altering the gauge by 1/4 PM changes the tension by 3%. alternative A-string: The A-steel string wound with chrome steel offers a full and round sound.