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In-Depth Guide on Prim Strings: Introduction to the Full Lineup [Violin/Viola/Cello/Nyckelharpa]

2026-04-27

When choosing strings, many people likely look for something that is "durable and has a bright tone."
In this blog, I will introduce "Prim Strings," a long-established brand from Sweden that is perfect for those needs!

■ What are Prim Strings?
Prim is a high-quality steel string manufacturer established in Sweden in the 1940s. They are characterized by a bright, well-defined tone and are particularly highly regarded in fiddle genres such as bluegrass, old-time, and country. They are widely used by everyone from professional musicians to students, and are especially known for their quick response, the tuning stability unique to steel strings, and their good value.

Manufacturer's Site

Table of Contents

Violin Strings
Viola Strings
Cello Strings
Nyckelharpa Strings

Violin Strings

Prim violin strings are known as highly reliable steel-core strings, boasting quick response, excellent durability, and a bright, warm tone.

Lineup

Prim （Medium / Soft / Orchestra）

The standard model of Prim violin strings. You can choose from three types of gauges: Medium, Soft, and Orchestra.

Prim / Violin String Set Medium, E-String Removable

Medium is the most standard tension, a classic model with a well-balanced feel.

Prim / Violin String Set Soft, E-String Removable End

Soft has lower tension than Medium, making it less tiring to play even during long performances.

Prim / Violin String Set Orchestra, E-String Removable End

Orchestra has firmer tension than Medium and is recommended for those seeking a powerful sound with presence.

Lisa （Medium / soft / Hard）

An E-string featuring stainless steel. It’s characterized by an extremely clear tone and resistance to rust. It offers smoothness within its brightness, making it suitable for solo performances and playing that emphasizes expression. You can choose from three types of gauges: Medium, Soft, and Hard.

Fractional Strings (3/4, 1/2, 1/4, 1/8 sizes)

For fractional violins (1/8 to 3/4). They achieve stable pitch and solid articulation, and demonstrate high durability even for practice use. Only the Medium gauge is available.

Electric Violin (for 4 and 5 strings)

Designed for electric violins. With clear articulation and low noise, the design is easy to handle even when played through an amplifier. It achieves a vivid and quick response. Its robust construction demonstrates high wear resistance, making it ideal for fretted fingerboards. It also offers a smooth and comfortable playing feel for fretless instruments. Available for both 4-string and 5-string setups.

Viola Strings

Prim viola strings are known for their bright and powerful tone. They are favored by soloists and orchestral players who want to bring out the maximum performance of their instruments.

Lineup

Prim (Medium / Soft / Orchestra)

The standard model of Prim viola strings. You can choose from three types of gauges: Medium, Soft, and Orchestra.

Prim / Viola String Set Medium

Medium is the most standard tension, a classic model with a well-balanced feel.

Prim / Viola String Set Soft

Soft has lower tension than Medium, making it less tiring to play even during long performances.

Prim / Viola String Set Orchestra

Orchestra has firmer tension than Medium and is recommended for those seeking a powerful sound with commanding presence.

Cello Strings

Prim cello strings are known for their brightness, resonance, and powerful tone. They are perfect for those seeking a well-defined sound, even in a bass instrument.

Lineup

Prim (Medium / Soft / Orchestra)

The standard model of Prim cello strings. You can choose from three types of gauges: Medium, Soft, and Orchestra.

Prim / Prim Cello String Set Medium

Medium is the most standard tension, a classic model with a well-balanced feel.

Prim / Cello String Set Soft

Soft has lower tension than Medium, making it less tiring to play even during long performances.

Prim / Cello String Set Orchestra

Orchestra has firmer tension than Medium and is recommended for those seeking a powerful sound with presence.

Fractional Strings (3/4, 1/2, 1/4 sizes)

For fractional cellos (1/4 to 3/4). They achieve stable sound and playability even as the size changes, allowing you to enjoy the consistent Prim sound. Only the Medium gauge is available.

Nyckelharpa Strings

Production began in the 1980s in collaboration with Swedish instrument makers. Currently, they are the only manufacturer in the world producing the four melody strings for this instrument. They are a true crystallization of expertise, supporting the sound of this traditional instrument.

Lineup

Prim (Medium / Soft / Orchestra C2 & G3 strings / Unwound A1 string)

Strings exclusively for the nyckelharpa, a traditional Nordic instrument. In addition to the three gauges of Medium, Soft, and Orchestra, the A1 string can be chosen from four types of plain strings. Please note that only the Medium gauge is available for purchase as a set.

Prim / Nyckelharpa String Set Medium

⇒ List of Prim Nyckelharpa Strings

Prim strings stabilize very quickly after being put on, so they are a reassuring ally for sudden restringing before a performance or when you want to focus on practice. They are recommended not only for fiddlers but also for classical musicians who prefer a clear, bright tone.
Try out how easy with clear resonance unique to steel strings for yourself!

⇒ List of Prim Products