|
Quantity
|
Cost
|
||
|
|
|||
|
|
|||
A String Thomastik Infeld Red 4/4 for Violin
The second string of the red Infeld branch: a composite (synthetic) core under a hydronalium winding — a light aluminium-magnesium alloy. Tension is 5.5 kp (12.1 lb), size 4/4, medium gauge, 32.5 cm vibrating length, ball end with a brass ferrule. The A is almost always the first string in a set to go: it carries the bulk of first- and second-finger work and the most perspiration, which is why it is the one most often bought on its own. The light winding here works for transparency: hydronalium does not load the string with mass, so the middle register stays open rather than veiled.
🏆 SoundsGood — genuine Thomastik-Infeld strings only, made in Vienna.
The String That Dies First — and Why That Is Normal
The A sits under the busiest zone of the left hand: first and second finger in first position, constant shifting, the largest area of skin contact. In any set it loses its upper partials before the D and G do and starts sounding duller than its neighbours, while the rest of the set is still perfectly usable. The single article IR02 covers exactly that case: one string is replaced instead of a whole set, and the tension returns precisely to the factory 5.5 kp.
Hydronalium: A Transparent Middle Without Sludge
Hydronalium is an aluminium-magnesium alloy, and the point of it is low density. A winding of it adds minimal mass, so the A responds quickly to the bow and the middle register stays transparent: in double stops with the D it does not swamp the neighbouring voice or muddy the chord. That same lightness keeps the string readable in high positions, where a heavy winding turns dull.
Composite Core at 5.5 kp: Compatibility With No Arithmetic
The core is a stranded composite, the same one used on the D and G of both Infeld branches — hence the tuning stability typical of synthetics and the warmer, broader tone the maker ascribes to the whole red line. Thomastik specifies the same 5.5 kp for the A in Red and Blue, so IR02 also fits an Infeld Blue set: a ready-made way to warm the middle while keeping the top and bottom bright.
Specifications
| Purpose | Single violin string |
| Line | Infeld Red |
| Note | A (a¹, second string) |
| Size | 4/4 (the line's only size) |
| Gauge | medium (mittel) — the line's only gauge |
| Core | Composite (synthetic) |
| Winding | Hydronalium (aluminium-magnesium alloy) |
| End | Ball end; brass ferrule |
| Tension | 5.5 kp (12.1 lb) |
| Vibrating length | 32.5 cm (12.8") |
| Compatibility | Tension identical to the Infeld Blue A (IB02) — the strings interchange between sets |
| Thomastik article | IR02 |
| Included | 1 string in a branded pack marked with the article number |
| Country of Manufacture | Austria — developed and produced in Vienna (Thomastik-Infeld, since 1919) |
What's Included
One A string in a branded Thomastik pack marked IR02. It has a ball end with a brass ferrule; no loop-end version exists in the line.
Who It's For
A string for the player who replaces the A more often than the rest of the set; for the violinist who needs a transparent, uncluttered middle in double stops; and for anyone building a Red-and-Blue hybrid who wants a warmer A at unchanged tension.
Frequently Asked Questions
What does a hydronalium winding mean?
Hydronalium is an aluminium-magnesium alloy; everyday descriptions often just call it an aluminium winding. The metal is light, so it adds little mass to the string: the middle register sounds transparent and the response to the bow stays quick.
What is the tension of IR02, and are other gauges available?
5.5 kp (12.1 lb) at a 32.5 cm vibrating length. There is one gauge only — medium (mittel); light and stark are not produced in Infeld Red.
Can IR02 be fitted into an Infeld Blue set?
Yes. The A tension is the same 5.5 kp in both Infeld branches, so the swap changes neither the load on the instrument nor the balance of the remaining strings.
How does the IR02 A differ from the IB02 A?
Structurally not at all: both are hydronalium over a composite core, ball end, 5.5 kp. What differs is the branch each belongs to in tonal character — the maker describes Red as warmer and broader and Blue as more focused and brilliant.
Is this string ball end or loop end?
Ball end, with a brass ferrule. The ball on the A is fixed — only the E (IR01) has a removable ball, and Infeld Red has no separate loop-end articles.
Are these genuine Thomastik strings?
Yes. SoundsGood supplies only genuine Thomastik-Infeld 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 Infeld Red A string at SoundsGood! ⚡