Detail 01
Hydronalium winding
An aluminum-magnesium alloy wrap. Lighter than heavier metal windings, which affects how quickly the string speaks.
Product detailSKU #1274115037138
ThomastikInfeld Red Series 4/4 Size Violin Strings 4/4 Size Hydronalium A String
Independent shopping perspective
The Korena take
A single A string for full-size violins, with a hydronalium winding. For replacing a worn second string rather than restringing the instrument.
Strong match
Who this is for
- Replacing a worn or false A on a 4/4 violin
- Players already using the Infeld Red line
- Keeping a spare A in the case
Consider the trade-offs
When to look elsewhere
- Fractional violins — 3/4, 1/2 and smaller need their own sizes
- Anyone stringing a violin from bare; this is one string
- Viola players — different length and tuning
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
4/4 size
Full size, the standard adult violin. Fractional instruments use shorter strings that won't tension correctly.
Detail 03
"Red" in the name
Identifies the Infeld Red line, not a visible finish. It tells you which series the string belongs to.
Detail 04
Sold as one A string
Second-highest string only. Your E, D and G stay as they are, including however worn they already are.
Detail 05
Single-string price
Per-string cost. Replacing the full set this way runs well above buying four together.
Detail 06
Staying within one line
Matching all four strings to the same series keeps tension and bow response even across the instrument.
Final check
Know before you order
- 01Confirm your violin is 4/4 — fractional sizes need different strings
- 02A string only; no E, D or G included
- 03New strings stretch, so plan on retuning repeatedly for a few days
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does this fit a 3/4 violin?
No. This is cut for a 4/4 full-size violin. A 3/4 instrument needs strings made for that size.
02What does hydronalium mean?
It's the alloy used for the string's winding — aluminum with magnesium. It's a lighter wrap than heavier metals used on some A strings.
03Is the string actually red?
Red refers to the Infeld Red series name, not the string's appearance.
04Can I buy just this one string?
Yes, that's exactly what this is — the A on its own, sold separately from the rest of the set.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Red
