Kaplan Solutions by D'Addario The Kaplan Solutions Viola A String produces a full, rich, and warm tone. It is designed to allow greater projection in the higher register of the instrument while balancing and blending well with the lower strings. Conceived with the professional performer in mind, it stands up well to extreme bow pressure, and provides a strong, soloistic tone quality without being overly bright. This is a steel core string with a titanium