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Thomastik Infeld Spirit Violin String Set - 4/4 size

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Thomastik Infeld Spirit Violin String Set - 4/4 size | SP100S 44 M

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Item# SP100S 44 M

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About This Item

Behind each strong of the Spirit! String line for violin and cello is the fundamental idea that making music should bring you joy. Made in Vienna, the advancing player and aspiring artist will discover Spirit! strings provide them everything needed to produce a distinguished sound for every kind of music.

Benefit highlights:
- Vibrant and warm
- Easy response
- Easy to tune
- Long-lasting

"Incredibly responsive with excellent projection. They are metallic and gritty to start and then settle-in very well." - NASMD Retailer

"Excellent value at the price point." - AFVBM Luthier


Spirit Violin A, D and G strings are synthetic core. The A and D are aluminum wound, and the G is silver wound. The E string is solid steel with a tin plating for a warmer sound and durability.

This Item includes all four strings. E string has a removable ball.

Warranty Info

The Best String Guarantee
Please inspect your strings immediately upon receipt. Installed strings are not returnable, unless they break within the first 30 days after purchase.

30-Day String Return Policy
Unopened strings may be returned within 30 days, so that we may supply all our customers with the freshest possible strings. Because of tonal qualities of each instrument are unique, we cannot accept string returns for reasons of tone, including false strings.

If you have any questions about this product's warranty or to make a return, please contact our Customer Service Department at 800.793.4334 or email us at [email protected]

About This Brand

Handmade Strings Since 1919 from Vienna, Austria

In 1919 violin maker Dr. Franz Thomastik and civil engineering specialist Otto Infeld founded the company, invented the steel string and caused a revolution in the music world. Suddenly the conventional gut string was challenged by a new string with the highest quality of tone, precision and reliability. It was received enthusiastically by virtuosi across the world.

The string makes the music. The diversity and beauty of the musical timbre depend upon, on the one hand, the type of material used for the core and on the other hand, the material spun around the core. For a perfect sound, Thomastik-Infeld has consistently chosen steel and nylon as the string core material for bowed and plucked instruments.

The highest standards are guaranteed by ongoing research in Thomstik-Infeld's own research lab engaging a team of highly specialized technicians. However, tone perfection is achieved primarily by the delicate touch of fingers and the highly qualified staff in the workshops: Every string at Thomastik-Infeld is wound and checked by hand.

Does It Matter Which Type of String You Put On Your Instrument? Absolutely!

Choosing the correct strings has a huge influence on its tone, ease of playing, and even its well-being: the best and most expensive instrument will only sound average if it is incorrectly strung, while an average instrument can transcend its own limitations with the correct choice of strings. As a matter of fact, switching to better strings is the shortest and easiest way to producing better sound.

From nine decades experience with string research, string development and string production we can safely say that while "the one perfect string for everyone" does not exist, the perfect string for your instrument, playing style and musical repertoire is most likely a Thomastik-Infeld. Up-to-date know-how and long experience enable us to bring out the best in each stringed instrument, revealing and enhancing its tone, color and quality.

Thomastik-Infeld offers a broad choice of products to fit every instrument, musical style, and playing situation. All products are handmade in Vienna to highest manufacturing standards, satisfying the most discriminating musician. 

Welcome to Thomastik-Infeld, please make your choice!
- Peter Infeld, 1942-2009

May we

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Customer Questions

Question by:


Asked On: 07/20/2016

Are these ball ends?

SHAR Answer:

Yes! All of the strings in this set are strings with ball ends. However, the E string is a removable-ball end.

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Yes | 98 people found this question helpful

Question by:


Asked On: 07/20/2016

I’m just learning to play. What does medium, heavy, light gauge mean? Which should I buy?

SHAR Answer:

Strings are able to stay in place on a violin because they are held there by tension/traction (they are not glued onto anything). Strings have two ends; one end that gets threaded into the peg and the other end that gets attached to the tailpiece via a fine tuner (also called string adjuster). They form tension/traction between the two ends of the instrument; that’s what makes them have sound when played. When you hear someone refer to medium, heavy or light gauge (or tension), they're referring to the thin or thickness of a string, which can impact the sound and response of a string. If you're just starting out, I would recommend medium (also referred to as medium/standard gauge). If you’re a parent buying replacement strings for the first time and you’re not sure, I would stick with medium/standard gauge. Without getting into too many complex details, just know that there are many factors (diameter/thickness/gauge, raw materials, pitch) that determine your string tension. Your string gauge/diameter alone does not determine a string’s tension, but can play a part in it. Buying a matched set of strings (all medium, for example) could give you the confidence that the gauges work well together. The choice of which gauge to use is a personal one, based on your playing style and the tone you are trying to achieve. As you progress and become more advanced, you’ll likely develop more of an opinion about what types of strings (including their material and their gauges) that you like best. For many more details about choosing strings, check out this page.

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Yes | 93 people found this question helpful

Question by:


Asked On: 07/20/2016

How many strings come in a set? How many are inside these packets?

SHAR Answer:

There are all 4 strings included in a set. It includes the strings E, A, D & G. Each string comes inside its own separate packet, so there is one string tucked inside each packet and there are four packets total in a set of strings.

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Yes | 87 people found this question helpful

Question by:


Asked On: 07/20/2016

Would these strings work on a student violin?

SHAR Answer:

Yes! These strings would work very well on a student’s violin. These strings are rather durable (especially given that they have a synthetic core, not a steel core). They last a pretty long time, so you're getting a great value for what you're spending. They're reasonably priced for the next step up after beginner's strings; they would likely be a good fit for an intermediate, aspiring student. Overall, these strings are a solid choice for any student, especially one who's looking to try something new or different after using inexpensive strings as a beginner.

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Yes | 102 people found this question helpful