Martin Authentic 80/20 Bluegrass 12-56

Martin Authentic Acoustic Superior Performance SP 80/20 Bronze strings in Bluegrass 12–56 gauge bring a fuller, more balanced tone to your acoustic guitar. Higher tensile strength and tin-plated core wire on all six strings support quicker response and increased tuning stability, whether you’re practicing at home or playing with others.

• Series: Authentic Acoustic Superior Performance SP
• Winding material: 80/20 bronze
• Gauge: Bluegrass, 12–56
• Higher tensile strength and tin-plated core wire on all six strings
• Designed for balanced tone, quicker response, and increased tuning stability