Martin Retro MM1012 12-String Acoustic Guitar Strings
- 12-string extra light set, .010 to .047
- Nickel/copper alloy with **Monel** wrap wire
- Corrosion resistant wrap
- Warm natural tone, softer attack
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A twelve-string extra light Monel set that softens the attack so the wood tone comes through, with natural corrosion resistance. Warranty needs a call to Martin.
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ASIN: B07PJNYTB3Model: Retro 12-StringCategory: Acoustic Guitar Strings
Overview
Playing a twelve-string with a nickel/copper blend, Monel-wrapped set gets a different voice from bronze. The proprietary Monel wrap is naturally corrosion resistant, and the set is made to show the guitar's own tonewoods.
A reduced attack lets the wood in the guitar be heard rather than the strike of the plectrum, which suits players after a warm, natural voice. The limitation is that warmth comes at the expense of the bright sparkle of bronze, and the warranty is not stated.
Who it's for
Twelve-string players with good tonewoods who want a warmer, softer-attack voice and long life. Those who want a bright shimmer should choose bronze sets.
Pros and cons
- Monel wrap wire resists corrosion
- Nickel/copper alloy blend
- Reduced attack shows tonewood
- Extra light gauge for easy fretting
- Less bright than bronze
- Warranty requires contacting Martin
Performance notes
The nickel/copper blend gives a softer initial attack, so the guitar's tonewoods stay in front of the string sound. Monel resists corrosion on its own, which allows long use without a coating. Extra light gauges lower tension across a twelve-string neck.
Specifications
| Brand | Martin |
|---|---|
| Model | Retro 12-String |
| Construction & materials | |
| String Material Type | Nickel/copper alloy |
| Body Material Type | Monel |
| Finish Type | Copper |
| Warranty & support | |
| Warranty Description | Contact the manufacturer |
| Other details | |
| String Gauge | Extra light, .010 to .047 |
| Instrument | 12-string acoustic guitar |
| Set Name | Retro Monel Extra Light 12-String |
| Sound Profile | Warm natural tone |
Frequently asked questions
How do I install Martin Retro MM1012 strings?
The listing gives no install steps. It is a 12-string set, so fit all strings as you would on any 12-string acoustic.
Are Martin Retro MM1012 strings bronze?
No. They use a nickel/copper alloy with Monel wrap wire.
Can I use Martin Retro MM1012 on a six-string?
No. The set is made for 12-string guitars.