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D'ADDARIO HELICORE VIOLIN SINGLE D STRING 4/4 Scale Medium Tension
The D is a string of colour rather than volume: it is rarely heard on its own, yet it decides whether an instrument sounds round or flat. In Helicore it is built as a titanium winding over a multi-stranded steel core — the combination D'Addario assigns to the D specifically, not to its neighbours. The official article is H313 4/4M: 4/4 size, medium gauge, ball end, 13 in (328 mm) playing length. The maker sums up the range as a "clear, warm tone", and on the D that reads as a warm middle that never turns muddy. This is the same D supplied in the H310 4/4M and H310W 4/4M sets.
🏆 SoundsGood — genuine D'Addario strings only, in official packaging.
Titanium Where the Neighbours Get Aluminium and Silver
A Helicore set is not uniform: the A is aluminium wound, the G silver wound, and the D takes titanium. The split is deliberate — each string gets a metal suited to its part of the range, and the D handles the passage from the singing middle down towards the bass. In practice that means fitting H313 when replacing this position: a different winding here changes the colour rather than the volume, and the set stops sounding like one instrument.
Stranded Steel: Warmth Without Mud
Steel strings have a reputation for cold, flat tone, and the stranded Helicore cord was built against exactly that: "Helicore strings are crafted with a multi-stranded steel core, resulting in optimal playability while producing a clear, warm tone." The D shows it most clearly — full and warm, yet still defined, so double stops and A-to-D crossings keep their outline. The smaller string diameter, which the maker also credits to the construction, adds quick bow response.
Replacing One String Instead of Four
A D fails less dramatically than an A: it seldom snaps, but over time it loses overtones and starts sounding dull. If the rest of the set is still alive, fitting one new string of the same medium gauge is cheaper and smarter, and the balance of the set stays put. The steel core does not stretch, so a fresh D settles within hours of playing instead of keeping you at the pegs for a week.
Specifications
| Application | Single violin D string |
| Series | D'Addario Helicore (violin) |
| Note | D, third string |
| Size / Playing Length | 4/4 — 13 in (328 mm) |
| Gauge | Medium |
| Tension | Medium class; D'Addario publishes no numeric per-string figures for Helicore |
| Core | Multi-stranded steel core |
| Winding | Titanium |
| End Type | Ball end |
| Set Membership | The same D is supplied in the H310 4/4M and H310W 4/4M sets |
| Neighbouring Windings | A — aluminium (H312 4/4M), G — silver (H314 4/4M) |
| D'Addario Article | H313 4/4M |
| Included | 1 D string in a sealed official D'Addario pack marked with the article number |
| Country of Manufacture | USA, New York ("Made in the USA at our New York production facility") |
What's Included
One D string in a sealed official D'Addario pack marked H313 4/4M. It is the stock D of the Helicore 4/4 medium sets, bought separately.
Who It's For
A string for the player whose D lost its overtones before the rest of the set, for anyone assembling Helicore one string at a time, and for the owner of a violin with a flat, characterless middle who wants warmth without losing clarity on the third string.
Frequently Asked Questions
What winding does this D have?
Titanium over a multi-stranded steel core — that is how the string is named in D'Addario's official listing: "Titanium Wound D String - H313 4/4M". The maker's own site does not list winding materials string by string.
Why does each string in the set use a different metal?
Because each works in a different part of the range: aluminium on the A, titanium on the D, silver on the G. That split is what makes the set even, so a replacement is best made with the matching article.
What is this string's tension in numbers?
D'Addario publishes no numeric tension for individual Helicore strings, only the class — medium here. Numbers exist as set totals alone.
Can it go on a set from another range?
Physically yes: 4/4 size, ball end, the standard 328 mm playing length. Tonally, though, the Helicore D is voiced for its own set and may stand out in someone else's.
How soon does it hold pitch after fitting?
The stranded steel core barely stretches, so the string reaches working pitch within hours. Helicore is advertised with "excellent pitch stability and longevity", and the D behaves accordingly.
Are these genuine D'Addario strings?
Yes. SoundsGood supplies only genuine D'Addario product in official packaging marked with article numbers.
🚚 Shipping and Payment
🏆 SoundsGood — full warranty and service support
✅ Quality guarantee — genuine strings only
🏪 Pickup — Kyiv, free
🚚 Nova Poshta / Ukrposhta / Meest — 1–3 days
💳 Installments — PrivatBank, Monobank
🎻 Order the Helicore 4/4 D string at SoundsGood! ⚡