Rich tone should last as long as the inspiration does. Martin SP Lifespan strings are the next level in studio performance. Treated for long life, they repel dirt, grit and other environmental elements that can quickly alter the sound of your strings. The treatment is so incredibly thin, you won't even know it's there. SP Lifespans are designed to last longer and sound better so you can play on!
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Martin SP Flexible Core 92/8 Phosphor Bronze acoustic guitar strings are made with the highest quality bronzed steel core wire and phosphor bronze wrap wire.
| Weight | E | B | G | D | A | E | Tension | Model |
|---|---|---|---|---|---|---|---|---|
| Extra Light | .010 | .014 | .023 | .030 | .039 | .047 | 133.3 | MSP7000 |
| Custom Light | .011 | .015 | .023 | .032 | .042 | .052 | 151.7 | MSP7050 |
| Light | .012 | .016 | .025 | .032 | .042 | .054 | 164.8 | MSP7100 |
| Medium | .013 | .017 | .026 | .035 | .045 | .056 | 186.2 | MSP7200 |
| Baritone | .014 | .020 | .030 | .042 | .054 | .070 | 169.8 | MSP7700 |
| Extra Light (12) 1-6 | .010 | .014 | .023 | .030 | .039 | .047 | MSP7600 | |
| Extra Light (12) 7-12 | .010 | .014 | .010 | .012 | .018 | .027 | 249.6 | MSP7600 |
Martin SP Lifespan 80/20 Bronze acoustic guitar strings are made with bronzed steel core wire and bronze wrap wire, then all six strings are treated for long life.
| Weight | E | B | G | D | A | E | Tension | Model |
|---|---|---|---|---|---|---|---|---|
| Extra Light | .010 | .014 | .023 | .030 | .039 | .047 | 130.2 | MSP6000 |
| Custom Light | .011 | .015 | .023 | .032 | .042 | .052 | 147.6 | MSP6050 |
| Light | .012 | .016 | .025 | .032 | .042 | .054 | 160.5 | MSP6100 |
| Medium | .013 | .017 | .026 | .035 | .045 | .056 | 181.1 | MSP6200 |