Thomastik-Infeld Spirocore bass strings feature a core that has greater elasticity than that of conventional strings, which means less inertia and a greater propensity for musical vibration.

The sound is full and homogenous, balanced and voluminous. The Thomastik-Infeld string has been calibrated to satisfy the express wish of many artists for a string that is equally effective for arco and pizzicato playing styles.

Bassists with a low C extension will value this string's reliability. Spirocore is also favored by jazz bassists for amplified pickup tone.