MartinAuthentic AcousticSuperior Performance SPstrings 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.
STRING GAUGES AND TENSION
| Gauge | E | B | G | D | A | E | Tension | Model |
|---|---|---|---|---|---|---|---|---|
| 80/20 BRONZE | ||||||||
| Extra Light | .010 | .014 | .023 | .030 | .039 | .047 | 135.8 | MA170 |
| Custom Light | .011 | .015 | .023 | .032 | .042 | .052 | 153.7 | MA175 |
| Light | .012 | .016 | .025 | .032 | .042 | .054 | 167.3 | MA140 |
| Bluegrass | .012 | .016 | .025 | .035 | .045 | .056 | 179.8 | MA240 |
| Medium | .013 | .017 | .026 | .035 | .045 | .056 | 189.6 | MA150 |
| Extra Light 12-String |
.010 .010 |
.014 .014 |
.023 .010 |
.030 .012 |
.039 .018 |
.047 .027 |
261.7 | MA180 |
| Light 12-String |
.012 .012 |
.016 .016 |
.025 .010 |
.032 .014 |
.042 .020 |
.054 .030 |
324.0 | MA190 |
| SILK & STEEL FOLK | ||||||||
| Custom | .0115 | .014 | .023 | .028 | .038 | .047 | 122.2 | MA130 |
| 92/8 PHOSPHOR BRONZE | ||||||||
| Extra Light | .010 | .014 | .023 | .030 | .039 | .047 | 137.0 | MA530 |
| Custom Light | .011 | .015 | .023 | .032 | .042 | .052 | 155.1 | MA535 |
| Light | .012 | .016 | .025 | .032 | .042 | .054 | 168.5 | MA540 |
| Light/Medium | .0125 | .0165 | .0255 | .0335 | .0435 | .055 | 179.3 | MA545 |
| Medium | .013 | .017 | .026 | .035 | .045 | .056 | 190.9 | MA550 |
| Extra Light 12-String |
.010 .010 |
.014 .014 |
.023 .010 |
.030 .012 |
.039 .018 |
.047 .027 |
263.3 | MA500 |
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