D'Addario H412 LH Viola Strings

Helicore Viola D String — Multi-Stranded Steel Core, Heavy Tension

The D'Addario Helicore Viola Single D String, Long Scale, Heavy Tension is a single replacement string designed for full-size violas that need a focused, dependable D voice. Built around a multi-stranded steel core — steel wires braided together into a cable core — D'Addario describes the construction as blending strength and flexibility while delivering a balance of clarity and complexity. The smaller string diameter that comes from this design gives the string a quick bow response, so attacks speak cleanly without needing extra weight from the bow hand. This D string is the heavy-tension option in the long-scale Helicore viola family, intended for players who want more resistance, more body, and a fuller sound from the middle of the instrument.

Technical Specifications

• String Designation: D — single replacement string for the D position of a full-size viola
• Scale Length: Long Scale — fits full-size violas
• Tension: Heavy — higher string tension for fuller sound and stronger projection
• Core: Stranded Steel Core — multi-stranded steel cable core for flexibility and bow response
• Ending: Ball End — ball-end fitting for standard viola tailpieces
• Instrument Compatibility: Viola
• Country of Manufacture: USA — made at D'Addario's New York production facility

Who It's For — Players and Playing Styles

This heavy-tension D string is the right choice for full-size viola players who need a dependable, articulate D voice with a heavier feel under the bow. D'Addario positions the Helicore line as a go-to for students, intermediate players, and professionals across traditional and alternative styles, and this option is well suited to advancing students who want more resistance to develop bow control, as well as working players who want a fuller sound in ensemble and solo settings. Stranded steel core construction gives the string a clear and focused articulation that sits well in chamber and orchestral textures, and it pairs with the rest of the Helicore viola set for a consistent tone across all four strings. Ball-end fitting makes installation straightforward on standard viola tailpieces, so the string can be swapped in quickly during practice, rehearsal, or performance.