LARSEN STANDARD CELLO STRINGS Cello strings with a solid steel core are a true core competence of ours at Larsen Strings. With a unique and overwhelming warmth and beauty of sound, these strings are ideal for the classical cello repertoires. Combined with great projection, rapid tuning stability and easy string response, Larsen Cello Strings with solid steel core have become popular the world over. Our A and D strings in particular have proven their outstanding quality and remain today?s benchmark still.