D'Addario J1012 4/4M D 4/4 Cello Strings

Reliable D String Replacement for Full-Size Cellos

The D'Addario Prelude Cello Single D String is a 4/4 scale, medium tension replacement string built around a solid steel core. Designed, engineered, and manufactured in the USA, it carries the same construction as the rest of the Prelude bowed orchestral line — strings that educators have long favored for their blend of warm tone, durability, and value. A unique damping process in the Prelude line keeps the tone warm and rich rather than thin or metallic, even on student-level instruments. With a 700 mm playing length and a ball-end fitting, this string drops into a standard 4/4 cello without modification, giving players a single-string fix instead of a full re-string.

Technical Specifications

• Instrument: Cello
• String Name: D
• Size: 4/4 (full size, 700 mm playing length)
• Tension: Medium
• Core: Solid Steel
• Ending: Ball End
• Country of Manufacture: USA

Who This String Is For

The D'Addario Prelude Cello Single D String is the right choice for students, teachers, and parents who need a dependable replacement D string for a 4/4 cello at an accessible price point. Its medium tension suits the majority of players — neither too heavy for developing hands nor too light to project in a school ensemble or studio setting. The solid steel core holds tuning reliably through temperature and humidity shifts, which matters for cellists who move between practice rooms, rehearsal halls, and performance spaces. It is also a practical match for school rental fleets and luthier repair benches, where a single-string replacement is often all that is needed to put an instrument back into service. For advancing students moving up from fractional sizes, the 4/4 Prelude D string offers a consistent tonal foundation that pairs naturally with the rest of the Prelude cello set.