Martin Era MP540T Light Acoustic Guitar Strings
- Light gauge, .012-.054
- Lifespan treatment against corrosion
- Flexible Core for fretability and comfort
- Silk-wrapped ball ends
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A set of vintage-minded light gauge acoustic strings with a corrosion treatment, for players who want comfort and a longer life. String alloy is not listed.
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ASIN: B0FN94LGJJCategory: Acoustic Guitar Strings
Overview
Martin builds the Era strings around a vintage design, with silk-wrapped ball ends and a Flexible Core that eases fretting. A patented Lifespan treatment is applied to protect against corrosion.
Comfort and corrosion protection are the reason to look: the core construction helps fretability and the treatment targets a longer life between changes. The limit is detail, as winding alloy and the number of strings per set are not listed.
Who it's for
A player who plays often or in humid places and wants strings that last will use the corrosion treatment. Those after a specific alloy, or a heavier gauge for more volume, should look at other sets.
Pros and cons
- Light gauge for easier fretting
- Lifespan corrosion treatment
- Flexible Core for comfort
- Silk-wrapped ball ends
- Winding alloy not listed
- Only one gauge set
- Not for electric guitars
Performance notes
A lighter gauge needs less finger pressure, and a flexible core makes bending and fretting easier. The corrosion treatment slows tone loss from sweat and humidity. Silk-wrapped ball ends are a vintage detail that suits the older design approach.
Specifications
| Brand | Martin |
|---|---|
| String Gauge | Light (.012-.054) |
| Core | Flexible Core |
| Treatment | Lifespan anti-corrosion |
| Ball Ends | Silk-wrapped |
| Instrument | Acoustic guitar |
Frequently asked questions
How do Martin Era strings resist corrosion?
The bullets describe a patented Lifespan treatment that protects against corrosion.
What gauge are these Martin Era strings?
Light, with a listed range of .012-.054.
Can I use them on an electric guitar?
The listing describes them as acoustic guitar strings, so use them on acoustic guitars.