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D'ADDARIO HELICORE VIOLIN SINGLE C STRING 4/4 Scale Medium Tension
First things first, so no one orders the wrong item: this is the fifth, low C string for a FIVE-STRING violin. A standard instrument tuned G-D-A-E has no place for it — its bottom string is the G, and this C cannot take that place. D'Addario describes the article as "a properly sized and gauged low C string for violins designed to use five strings". The construction is a silver winding over a multi-stranded steel core, official article H315 4/4M, 4/4 size, medium gauge, 13 in (328 mm) playing length. The same string is supplied in the five-string Helicore set HE310-5 4/4M.
🏆 SoundsGood — genuine D'Addario strings only, in official packaging.
A String for Five-String Violins Only
Getting this wrong costs money and time, so plainly: a C below the G exists only on violins built for five strings, with the neck, bridge and tailpiece to match. On a standard four-string violin it simply has nowhere to go — no slot at the nut or bridge, and no role in the tuning. If you need the bottom string for an ordinary instrument, that is the G, article H314 4/4M in the same range.
The 4/4 Marking Means a Violin C, Not a Viola C
The "4/4" here is neither accidental nor a catalogue slip: D'Addario marks viola strings by scale length (Long, Medium, Short Scale) and gives them entirely different articles. The Helicore violin C exists precisely as H315 in the 4/4 size with a 13 in (328 mm) playing length. In other words it is scaled for a violin, not a viola string pressed into service.
Silver Over Steel: Below the G Without the Mush
The lowest string on an instrument is the hardest engineering problem: it is easy to end up with a sluggish drone that has no start to the note. Helicore answers it the same way as on the G — a dense silver winding over a multi-stranded steel core supplies mass for the bottom while keeping the clarity the maker calls a "clear, warm tone" with quick bow response. For a player who moved to five strings for folk, jazz or improvisation, that means the bottom voice can be heard, not merely felt.
Specifications
| Application | Single low C string for a five-string violin |
| Important | Not applicable to a standard four-string violin (G-D-A-E) |
| Series | D'Addario Helicore (violin) |
| Note | C, low fifth 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 | Silver (per the official D'Addario naming) |
| End Type | Ball end — per the general construction of the Helicore violin range |
| Set Membership | Supplied in the five-string Helicore set HE310-5 4/4M |
| D'Addario Article | H315 4/4M |
| Included | 1 C 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 low C string in a sealed official D'Addario pack marked H315 4/4M. It is the same fifth string that comes in the five-string Helicore set HE310-5 4/4M.
Who It's For
A string for the owner of a five-string violin replacing the bottom C, for folk, jazz and crossover players working below the usual violin range, and for anyone building the five-string Helicore set one string at a time.
Frequently Asked Questions
Will this string fit my ordinary violin?
No. This is a low C for violins designed to use five strings: standard G-D-A-E tuning has no place for it, and it cannot replace the G. On a normal violin the bottom string is the G, article H314 4/4M.
Is this not a viola C string?
No. D'Addario marks viola strings by scale length (Long, Medium, Short Scale) with different articles altogether. This is the Helicore violin C, article H315 4/4M, 4/4 size with a 328 mm playing length.
What is it made of?
A multi-stranded steel core with a silver winding — the wording of D'Addario's official listing is "Silver Wound C String - H315 4/4M". Structurally it belongs to the same family as the rest of Helicore violin.
What tension does it have?
Only the class is given — medium. The maker publishes no numeric per-string tension for Helicore, and totals exist for complete sets only.
Is there a complete five-string set?
Yes, the range includes the Helicore HE310-5 4/4M set, which contains this same C. The single string is bought when the rest of the set is still in good shape.
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 low C string for a five-string violin at SoundsGood! ⚡