Viola players looking for a warm, rich, and flexible sound should check out the D'Addario Kaplan Amo strings. This is a professional-level, full set of strings designed for medium-scale violas (body length around 15 to 15 3/4 inches). They have a medium tension, which is a great balance for most players, offering good playability and a full tone. The Kaplan Amo set uses a synthetic core, which is known for producing a warmer, more complex sound compared to steel – perfect if your viola is naturally on the brighter side. They're famous for having a short break-in time, so you don't have to wait weeks for them to settle, and they offer excellent bow response. Made in the USA with D'Addario's precise quality control, they come in sealed pouches to prevent corrosion. A top choice for advancing students and professionals.