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D'ADDARIO HELICORE VIOLIN SINGLE A STRING 4/4 Scale Medium Tension
The A lives under the fingers more than any other string: most positions, most vibrato and most long phrases happen there, so its winding wears through first. In Helicore it is built as an aluminium winding over a multi-stranded steel core — official article H312 4/4M, 4/4 size, medium gauge, ball end, 13 in (328 mm) playing length. The aluminium is there for midrange transparency: it is light, so it does not smother the core and leaves the middle register the definition the range is praised for — "a clear, warm tone". This is the same A that sits in the H310 4/4M set.
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Aluminium Over Steel: A Legible Middle
The midrange is where tone goes wrong most easily: it turns dull and woolly, and phrases lose their outline. A light aluminium winding over a steel cord does the opposite — it adds barely any mass and keeps the string defined, so a melody on the A stays readable even inside the dense texture of an orchestral section. The maker describes the range as clear and warm at once, and the A is where that balance is easiest to hear.
The String That Wears Out First
The winding on the A gives way exactly where the fingers sit, and you see it before you hear it: first a shiny groove appears, then the sound starts to deaden and go false in the upper positions. That does not have to mean buying a whole set — one string restores evenness while the D and G are still healthy. The stranded steel core does not stretch, so a fresh A settles within hours and stands in tune with the rest immediately.
Careful: The Range Holds a Second A
Alongside this string D'Addario also makes H312T 4/4M, an A with a titanium winding. That is a different article with a different character, so the code is what to check when ordering: this listing is H312 4/4M, the aluminium-wound A supplied in Helicore sets. Its medium gauge matches the H310 4/4M and H310W 4/4M sets, so a replacement does not upset the balance.
Specifications
| Application | Single violin A string |
| Series | D'Addario Helicore (violin) |
| Note | A, second 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 | Aluminium |
| End Type | Ball end |
| Set Membership | The same A is supplied in the H310 4/4M and H310W 4/4M sets |
| Do Not Confuse | H312T 4/4M — a different A in the same range, titanium wound |
| D'Addario Article | H312 4/4M |
| Included | 1 A 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 A string in a sealed official D'Addario pack marked H312 4/4M. It is the stock A of the Helicore 4/4 medium sets, bought on its own.
Who It's For
A string for the player whose A has worn through while the rest of the set is fresh, for the orchestral violinist who needs a legible middle register in dense textures, and for anyone assembling a Helicore set one string at a time.
Frequently Asked Questions
What winding does this A have?
Aluminium over a multi-stranded steel core — that is how the string is named in D'Addario's official listing: "Aluminum Wound A String - H312 4/4M". The light winding metal keeps the middle register defined.
How does H312 differ from H312T?
By winding material: H312 is aluminium, H312T is titanium. They are two separate articles in the same range, so check the code when ordering; this listing is H312 4/4M.
Can I replace the A alone instead of the whole set?
Yes, that is normal practice: the A winding wears faster than the others. As long as you fit the same range and the same medium gauge, the balance of the set stays intact.
How long does a new A take to settle?
Quickly: the stranded steel core barely stretches, so it stabilises within hours of playing rather than days. Pitch stability is a property the maker highlights for Helicore: "excellent pitch stability and longevity".
What is the exact tension in pounds?
D'Addario does not publish numeric tension for individual Helicore strings, only the Light, Medium or Heavy class. So the medium gauge is stated here, while numeric totals exist for complete sets.
Are these genuine D'Addario strings?
Yes. SoundsGood supplies only genuine D'Addario product in official packaging marked with article numbers.
🚚 Shipping and Payment
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🎻 Order the Helicore 4/4 A string at SoundsGood! ⚡