Check the listing for details. Thomastik-Infeld Rondo Cello A String - 4/4 Multi-alloy Wound, Light. Listed at 72.49 USD. Pro-level Strings with Power and Balance Thomastik-Infeld Rondo cello strings offer a clear, powerful, direct sound with an ear-grabbing, velvety tonality. These strings exhibit smooth string-to-string transition, along with a fast, precise response. Here at Sweetwater, we appreciate how resistant these strings are to changes in temperature, humidity, acoustics, and even your own nervous tension. If you're searching for a versatile, professional-level cello string with soloistic power, muscular projection, and a rich sound, these check all the right boxes. The preferred string of elite cellist Santiago Cañón-Valencia, Thomastik-Infeld Rondo cello strings offer maximum support and enhancement for soloists while supplying a wealth of complex possibilities.