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.
- Guitar Type: Acoustic Guitar
- Number of Strings: 6
- Coated: No
- Gauges: .0115, .014, .023, .028, .038, .047
- Core Material: Tin-plated Steel
- Winding Material: Silk & Steel
- Winding Type: Round

ERNIE BALL EARTHWOOD MEDIUM LIGHT 12-54
DADDARIO EJ40 SILK & STEEL
ERNIE BALL EARTHWOOD LIGHT 11-52
ERNIE BALL EARTHWOOD EXTRA LIGHT 10-50
ERNIE BALL EARTHWOOD PHOSPHOR BRONZE ACOUSTIC 10-50
DADDARIO EJ16 PHOSPHOR BRONZE
DADDARIO EZ890 85/15 BRONZE
DADDARIO EZ900 85/15 BRONZE
ERNIE BALL EARTHWOOD ROCK & BLUES 10-52
ERNIE BALL EARTHWOOD 12 STRING MEDIUM
ERNIE BALL EARTHWOOD BLUEGRASS 5-STR SET
ERNIE BALL EARTHWOOD PHOSPHOR BRONZE ACOUSTIC 13-56
DADDARIO EJ12 80/20 BRONZE
DADDARIO EJ17 PHOSPHOR BRONZE 