C.F. Martin & Co MA240 AUTHENTIC SP BLUEGRASS 80/20 BRONZE BLUEGRASS 12-16-25-35-48-56
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Information
Information
Manufacturer Information
Martin Strings
https://www.martinguitar.com
customerservice@martinguitar.com
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Designed for Acoustic Guitarists Alternating Between Rhythm and Solo Playing
The Martin Authentic Acoustic strings were developed to meet the demands of discerning musicians seeking feel, tuning stability, and consistent sound. With this Bluegrass set, you benefit from a well-balanced setup highly appreciated in flatpicking and dynamic playing styles: lighter treble strings for added comfort while maintaining bass strings strong enough to support accompaniment. The choice of 80/20 Bronze delivers immediate clarity and a bright upper spectrum, perfect for highlighting articulation and detail. Within the range, these strings are also available in 92/8 Phosphor Bronze for those looking for a warmer tone.
Technical specifications
| Tension | Medium | Draw | 12-16-25-35-45-56 |
| Type of cord attachment | Ball end | 1st cord pull | 12 |
| Category | acoustic | Nbr of strings | 6 |
| Classification | Bluegrass | Material | 80/20 bronze |
| Brand | Martin Strings | Core | very strong |
| Reference | MA240 | Protection | tin plating on all 6 strings (enhanced corrosion resistance) |
| Series | Authentic Acoustic | Winding | high quality |
| Type | acoustic guitar strings | Gauge | 12-16-25-35-48-56 |
| Version | Authentic SP Bluegrass | Availability in the range | also available in 92/8 Phosphor Bronze |
| Alloy | 80/20 Bronze | ||
Questions frequently asked
What is the gauge of Martin MA240 Bluegrass strings?
The set is listed as 12-16-25-35-45-56, with a first string of .012. However, a detailed note mentions a fifth string of .048.
Are these strings suitable for Bluegrass flatpicking?
The Bluegrass classification and the balance between bright trebles and present basses are designed for flatpicking. Articulation remains emphasized during dynamic playing.
What tone does 80/20 bronze provide?
The 80/20 Bronze alloy offers immediate clarity and a bright high register. Note detail and articulation are thus enhanced.
Are the MA240 strings corrosion-resistant?
All six strings receive a tin plating intended to increase corrosion resistance. The core is also described as very strong.
Is there a phosphor bronze version of the Martin Authentic Acoustic Bluegrass strings?
A 92/8 Phosphor Bronze variant is available in the range. This version is indicated for a warmer tonal character.



