D'Addario H312 4/4H A Violin Strings

Helicore Violin Single A String — Heavy Tension for Full-Size Violins

The D'Addario Helicore Violin Single A String, 4/4 Scale, Heavy Tension is a replacement string designed for full-size violins with a 328 mm (13") playing length. Built around a multi-stranded steel core — steel wires braided together to form a cable core — this string blends strength with flexibility, producing a balanced tone that combines clarity and complexity. The heavy tension designation gives the instrument greater projection and volume potential compared to lighter tensions, while the stranded core's smaller diameter enables quick bow response and fast, articulate playability. Premium materials and skilled workmanship deliver the pitch stability and longevity that have made Helicore one of the most widely used violin string lines across student, intermediate, and professional levels.

Technical Specifications

• Instrument: Violin (4/4 scale)
• String: Single A string
• Playing Length: 328 mm (13 inches)
• Core: Multi-stranded steel core
• Tension: Heavy
• Ending: Ball end
• Origin: Made in the USA (New York)

Who This String Is For

This heavy tension A string is the right choice for violinists who need greater projection and volume from their instrument. It suits players across classical, traditional, bluegrass, and alternative styles, as well as those using electric or amplified setups. Advancing students and intermediate players benefit from the added power and presence, while the stranded core's quick bow response and tonal clarity appeal to professionals seeking a versatile, responsive string. The ball-end design ensures straightforward installation on standard fine tuners, and the sealed pouch packaging protects against corrosion until the string is ready to use.