Ernie Ball 2813 Flatwound Hybrid Slinky 45-105
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What you need to know
What you need to know
- Flatwound feel : fast glide, comfortable sensation, and reduced finger noise.
- Cobalt alloy : more pronounced attack and modern definition, ideal for cutting through the mix.
- Hybrid Slinky 45-105 gauge : balance between playability and tension, suitable for versatile styles.
- Clean and controlled sound : perfect for precise riffs, fingerstyle as well as pick playing.
Manufacturer Information
Ernie Ball
https://www.ernieball.com
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Safety manager:
Algam SAS
Email: contact@algam.net
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The flatwound feel with a more contemporary response
The Ernie Ball 2813 Flatwound Hybrid Slinky 45-105 strings are designed for bassists who appreciate the comfort of flatwound strings while seeking a more modern tonal signature. The flat winding provides a smooth sensation under the fingers and quiet playing, highly valued both in the studio and on stage. The addition of cobalt modernizes the response: greater clarity, sharper attack, and better definition, without losing the control and consistency typical of flatwounds.
Whether you play tight grooves, melodic lines, or pick parts, this 45-105 gauge offers balanced resistance and good stability. An excellent choice for those who want a precise, articulate, and comfortable sound while maintaining the flatwound aesthetic.
Technical specifications
| Tension | Medium | 1st cord pull | 45 |
| Type of cord attachment | Ball end | Nbr of strings | 4 |
| Category | 4-string bass | Spun | flat |
| Classification | Hybrid | Material | cobalt |
| Draw | 45-65-85-105 | ||
| Brand | Ernie Ball | Type | flatwound strings |
| Reference | 2813 | Alloy | cobalt |
| Model | Flatwound Hybrid Slinky | Gauge | 45-105 |
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Questions frequently asked
What is the gauge of the Ernie Ball 2813 Flatwound Hybrid Slinky strings?
The set features a medium gauge 45-65-85-105 for 4-string bass, with the first string at .045. This configuration provides balanced tension and good stability.
Are these strings suitable for a 4-string bass?
This model is designed for a 4-string bass and includes four strings with gauges .045, .065, .085, and .105.
What tone does cobalt bring to these flatwound strings?
The cobalt alloy delivers increased clarity and a sharper attack. Definition is maintained while preserving the control associated with flatwound winding.
Are the Flatwound Hybrid Slinky strings quiet under the fingers?
The flatwound construction provides a smooth feel under the fingers and reduces playing noise, an advantage appreciated in the studio as well as on stage. The response remains articulate thanks to the cobalt.
What type of ball-end do these bass strings use?
Each string is equipped with a ball-end. The 2813 reference corresponds to a cobalt flatwound set with hybrid classification.



