I am constantly working on the further development of the 5-string. The playability, the sound quality, the volume as well as the balance between the higher and lower registers are one of my main concerns. However, I do not commit myself to a particular model, but rather make the model choice in collaboration with the musician in order to satisfy the needs and preferences of the individual and his orchestra.

Link to article about Klotz released in “Double Bassist” 23, Winter 2002