Martin Authentic Acoustic SP® Guitar Strings Phosphor Bronze - (MA550) Medium 13-56 Tenor 5"-radius fingerboard and narrow-tall frets

5"-radius fingerboard and narrow-tall frets

· Number of Inputs: 4 (2 Channels w/ Normal & Bright Inputs)

balanced with comfortable playability

· Effects: Reverb

Martin Authentic Acoustic SP® Guitar Strings Phosphor Bronze - (MA550) Medium 13-56 Tenor 5"-radius fingerboard and narrow-tall fretsMartin 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.