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 .050 WOUND SINGLE STRING
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DADDARIO EJ17 PHOSPHOR BRONZE
DADDARIO EJ40 SILK & STEEL
ERNIE BALL 5-STRING POWER SLINKY 50-135
DADDARIO HELICORE LIGHT DOUBLE BASS STRI
DADDARIO EJ11 80/20 BRONZE 