D'Addario XSB45100 Bass guitar strings

Coated Bass Strings Built for Long-Scale Players

The D'Addario XSB45100 is a 4-string Regular Light bass string set designed for long-scale electric basses. Its round-wound nickel-plated steel wrap wire produces the punchy, balanced tone that has made D'Addario a go-to brand for working bassists, while the ultra-thin XS coating keeps that tone intact far longer than uncoated strings. Dirt, sweat, and skin oils stay on the surface of the film instead of working into the windings, so the strings keep their clarity and definition across long rehearsals and touring schedules.

Inside each string sits a NY High Carbon Steel core — the same wire D'Addario uses across its premium lines. The hexagonal core profile gives the wrap wire more surface area to grip, which translates into better intonation, more stable tuning, and a familiar feel under the fingers. The 45-100 Regular Light gauge is the most popular option in the XS bass lineup, offering a blend of response and playability that suits everything from slap and fingerstyle to pick-driven rock and groove playing.

Technical Specifications

• Number of Strings: 4
• Gauge: .045"-.100" (Regular Light)
• Hardness: Regular Light
• Wrap Material: Reformulated nickel-plated steel
• Core: NY High Carbon Steel (hexagonal)
• Winding Type: Round Wound
• Finish: Coated (ultra-thin XS film)
• Scale Length: Long
• Set: 1 set

Who This Set Is For

The XSB45100 is the right choice for bassists who want the bright, articulate character of round-wound nickel strings without giving up tone to the usual coated-string trade-offs. The 45-100 Regular Light gauge works across rock, pop, funk, jazz, country, and metal, and the long-scale fit covers most standard 4-string electric basses with a 34" scale length. Gigging players who sweat through sets, studio players who want fewer string changes between sessions, and anyone tired of the dull, sticky feel of older coated strings will appreciate what the XS film brings to the table. Made in D'Addario's New York facility, this set pairs the brand's most popular bass gauge with its most advanced coating technology.