Martin MA550 Authentic Acoustic Superior Performance 92/8 Ph. Bronze Guitar Strings - Medium 13-56 cat5e 75” long support arms hold

75” long support arms hold gear with a width of 9” or greater

and adds a couple of features previously unavailable

simultaneously

flat frequency response of 3 Hz to 50 kHz further maximizes detail

Martin MA550 Authentic Acoustic Superior Performance 92/8 Ph. Bronze Guitar Strings - Medium 13-56 cat5e 75” long support arms holdMartin 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.