Gear article

Pirastro Flexocor 1/2 Double Bass D String

The Pirastro Flexocor 1/2 Double Bass D String is a premium orchestral string featuring a high-tensile carbon steel rope core and chrome steel winding. Specifically engineered for arco performance, it offers high responsiveness and a warm, stable tone suitable for smaller-sized instruments.

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Background and Design

Pirastro Flexocor strings have long been established as a standard for orchestral double bassists. This specific D string is designed for 1/2 size instruments, ensuring that students and players using smaller basses can achieve professional-level tonal quality. The engineering focus is on stability and ease of play, particularly when using a bow.

Technical Composition

The string is constructed around a high-tensile rope core made of carbon steel. This multi-strand design provides significantly more flexibility than traditional solid steel cores, allowing for greater tonal modulation. The core is wound with chrome steel, which contributes to the string's longevity and adds a characteristic warmth to the overall sound profile.

Arco and Pizzicato Performance

Primarily aimed at arco players, the Flexocor is designed to 'speak' with minimal effort. The string's responsiveness reduces the physical pressure required from the bow to initiate sound. Conversely, when played pizzicato, the string exhibits a short sustain. This makes it ideal for the 'thump' required in classical orchestral settings rather than the long, singing sustain preferred in jazz genres.

Comparison to Alternatives

Within the Pirastro catalogue and the wider market, Flexocor strings are distinguished by their flexibility compared to solid-core alternatives like various D'Addario Helicore or basic steel models. While strings such as Thomastik Spirocore are often favoured by jazz musicians for their bright edge and long sustain, the Flexocor provides a darker, more controlled sound that sits better within a string section.

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Frequently asked questions

What is the primary material used in the Flexocor D string core?
The string features a high-tensile carbon steel rope core. This multi-strand design allows for better flexibility compared to solid steel cores.
How does the winding material affect the sound?
The string is wound with chrome steel. This material adds warmth to the tonal profile and is a traditional choice for achieving a classic orchestral bass sound.
Is this string suitable for jazz playing?
While it can be used for jazz, it is specifically designed for orchestral use. Its short sustain when plucked provides a classic orchestral pizzicato sound rather than the long sustain jazz players often prefer.
What size double bass is this string designed for?
This particular model is designed specifically for 1/2 size double basses. It will not fit properly on full-size (4/4) or 3/4 size instruments.
Does this string use a ball end or a loop end?
The Pirastro Flexocor 1/2 Double Bass D string features a ball end. This allows for secure installation into standard double bass tailpieces.
What is the main advantage of the rope core design?
The rope core provides increased flexibility over solid cores. This flexibility offers the player more tonal possibilities and a more responsive feel under the fingers and bow.
How responsive is the string when playing arco?
The string is highly responsive under the bow. It requires less effort and touch for the string to speak, making it easier to execute complex bowing techniques.
What is the typical price for a single Flexocor 1/2 D string?
The typical price for this individual string is approximately £60. Prices may vary slightly depending on the retailer and shipping costs.
Is the Flexocor considered a bright or warm string?
It is considered a warm string. The combination of the rope core and chrome steel winding is specifically tuned to provide the warmth typical of orchestral basses.
How does this compare to Thomastik Spirocore strings?
Flexocor strings have a shorter sustain and a warmer, darker tone. Spirocore strings are generally brighter with much longer sustain, making them more popular for jazz than for orchestral arco work.
Who is the manufacturer of Flexocor strings?
Flexocor strings are manufactured by Pirastro, a renowned German company famous for producing high-quality bowed instrument strings.
Is this string durable for student use?
Yes, the chrome steel winding provides good durability and resistance to corrosion. Its high stability also means it stays in tune well once stretched.