Martin MA550 Authentic Acoustic SP Guitar Strings Phosphor Bronze Medium 13-56 BCT-DELAY Expandable trigger system supports external

Expandable trigger system supports external drum pads

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Martin MA550 Authentic Acoustic SP Guitar Strings Phosphor Bronze Medium 13-56 BCT-DELAY Expandable trigger system supports externalProduct Information 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