One set of Spirocore solo-tuning bass strings for upright string bass: F#, B, E, A. Thomastik Spirocore Solo strings continue to be one of the most popular solo-tuning sets ever manufactured, with a well-deserved reputation for projection, clarity, and ease of playing. Clear harmonics are one of their benchmarks. A fairly long break-in time, during which other household members may experience an increased risk of hara-kiri, but once they settle in, the excess brightness dissipates. Spirocore solo strings are actually very good at orchestra pitch, and can be a very good solution for literature with a lot of harmonics, basses that are really tight, or for players who need low tension while they are developing hand strength.
Not sure these are right for you? Check our comprehensive string guide here!