The MM13 Retro acoustic guitar strings represent yet another quality, vintage-inspired set of strings in Martin’s Retro line. These strings harken back to the 1930s when nickel ruled the acoustic world. Made from Monel, a solid nickel/copper wrap, the MM13s let your acoustic’s natural wood tone ring through with a full low end, a high-end snap, and a solid midrange. The proprietary wrap on the MM13s is corrosion-resistant and impressively strong for long life and uncompromised tone. Martin MM13 strings are a favorite among acoustic guitarists here at Tone Tailors
