D'Addario H512 1/4M D 1/4 Cello Strings

Steel-Core Cello D String for 1/4 Scale Instruments

The D'Addario Helicore Cello Single D String is a stranded steel core replacement string engineered for 1/4 scale cellos. Unlike traditional gut-core or solid synthetic-core strings, the stranded steel construction delivers a notably bright, focused tone with immediate bow response — the string speaks the moment the bow makes contact. This single D string is sold individually, making it ideal for replacing a worn or broken D string without purchasing a full set. Players upgrading from factory-installed strings will notice more powerful projection and a cleaner attack, particularly in the upper register where the D string carries melodic lines. Designed as part of the Helicore orchestral line, this string shares the family characteristics of quick response and stable tuning once settled, with a smaller diameter than comparable wound strings that can make shifting positions easier for younger players with smaller hands.

Technical Specifications

• Number of Strings: 1 — single replacement string
• String: D — designed for the D position on a cello
• Size: 1/4 — fits 1/4 scale cellos
• Hardness: Medium — medium tension
• Core: Stranded Steel — multi-strand steel core construction
• Ending: Ball End — ball-end fitting for standard tailpieces
• Compatible With: Cello
• Country: US — made in the United States

Who It's For

The Helicore Cello Single D String in 1/4 scale medium tension is the right choice for student cellists and teachers who need a reliable replacement D string for a 1/4 size instrument. Young players transitioning from beginner fractional cellos will appreciate the quick bow response and bright projection that helps their playing cut through ensemble settings. The stranded steel core's stability makes it well suited to practice rooms and school orchestra programs where tuning consistency matters between sessions. Medium tension strikes a practical balance — firm enough to produce a clear, focused tone, yet flexible enough for developing left-hand technique. Teachers stocking replacement parts for student rental fleets will find the individual single-string format cost-effective compared to purchasing full sets.