Corelli makes a bass string with a nickel wrap in orchestra tuning, the 380 Series. They are thicker than the 370 Series strings making them some of Corelli's more "usual" upright bass strings. They are more supple than other steel strings and make an easy to play and well-priced alternative for jazz or cross-over play. 380 Series bass strings come in 380 Medium (remember, in Corelli Speak this is a thinner gauge string) and they come in 380 ForteTX, the higher tension Corelli string. In orchestra tuning G-D-A-E.

380TX is suggested for acoustic jazz work where maximum acoustic output is required. They have a strong sound and a richer tone.

In orchestra tuning G-D-A-E.