Martin MA550 13-56 Medium Authentic Acoustic SP 92/8 Phosphor Bronze Guitar Strings

At C.F. Martin & Co., strings are crafted with the same uncompromising attention to detail as their iconic guitars, with performance, tone, and playability at the forefront. Designed for musicians who demand reliability onstage, in the studio, and everywhere in between, Martin® Authentic Acoustic® Superior Performance SP® strings are made from premium materials and feature higher tensile strength with tin-plated core wire on all six strings. The result is a fuller, more balanced tone, faster response, and enhanced tuning stability, all achieved through Martin’s precision manufacturing and exacting tonal standards—so every restring delivers the sound and feel you expect from Martin.