Martin Authentic Acoustic MA500 Phospher Bronze 10-47 Extra Light 12-String Set

Martin Authentic Acoustic SP® strings offer excellent tuning stability, corrosion resistance and great playability.

Martin® Authentic Acoustic® Superior Performance SP® strings feature higher tensile strength and tin-plated core wire on all six strings that enable a fuller and more balanced tone, quicker response and increased tuning stability. Our impeccable standards for acoustic guitar tone are embedded in our string design and precision manufacturing process. That's why we make our own.