D'Addario Prelude double bass string setIntroducing the DAddario Prelude double bass string set Prelude strings are the educators preferred choice for student strings due to their unique blend of warm tone, durability and value. Prelude strings have the warmest sound available in an affordable, solid steel core string design. Unaffected by temperature and humidity changes, they have an excellent bow response. Designed and engineered for unparalleled longevity and durability, the balanced