D'Addario KS512 4/4M D 4/4 Cello Strings

D'Addario Kaplan Cello Single D String, 4/4 Scale, Medium Tension — Professional Replacement for Full-Size Cellos

The D'Addario Kaplan Cello Single D String, 4/4 Scale, Medium Tension is a single replacement string crafted for cellists who need to swap out a worn or broken D without buying a full set. Engineered to Kaplan's professional orchestral standard, this string offers a beautiful, ample tonal palette paired with superior bow response, clarity, and warmth across the whole tonal spectrum. The stranded steel core gives the D line a stable, controlled feel under the bow, while the medium tension keeps the playing resistance comfortable for both sustained lyrical passages and articulate spiccato work.

Designed and manufactured in the United States, this single D string is sold as a replacement part for the Kaplan cello range. It is the right choice for cellists who already trust Kaplan strings on the rest of their instrument and want to maintain a consistent voice on the D line, or for players upgrading from a stock or student string to a more responsive, projectable option.

Technical Specifications

• Instrument: Cello
• String: D (single replacement string)
• Scale Size: 4/4 (full-size cello)
• Tension: Medium
• Core: Stranded Steel
• Ending: Ball End
• Model Code: KS512 4/4M
• Country of Manufacture: United States

Who This Cello D String Is For

The Kaplan Cello Single D String in 4/4 medium tension is built for advanced students, conservatory players, and professional cellists who need a reliable single replacement rather than a full set. Its medium tension sits comfortably for players who want bow control without sacrificing the depth and warmth that the D line carries in solo and ensemble repertoire. The stranded steel core responds cleanly to a range of bow strokes, from sustained legato to détaché and spiccato, making it a practical choice for orchestral section playing, chamber music, and solo practice alike.

Cellists who already run Kaplan strings on their A, G, and C lines will find this D string matches the same tonal family, preserving the clarity and warmth across the whole tonal spectrum that defines the Kaplan range. Players moving up from entry-level steel-core strings will notice an immediate improvement in bow response and projection, while experienced professionals will appreciate the consistent tuning stability and the expressive palette the string offers under pressure. The ball end allows quick installation on any standard cello tailpiece, so the string is ready to play within minutes of fitting.