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Authentic Acoustic SP®

These strings are engineered with the performer in mind and they will always stand up to rigorous practice and performance schedules. We start with our highest tensile-strength core wire, then tin-plate it on all six strings for added corrosion resistance; because what you don’t see matters! When coupled with our highest quality wrap wire you get consistent true tone that you can count on song after song. Available in 80/20 Bronze and 92/8 Phosphor Bronze.

Martin Authentic Acoustic SP® strings offer excellent tuning stability, corrosion resistance and great playability.

These strings are engineered with the performer in mind and they will always stand up to rigorous practice and performance schedules. We start with our highest tensile-strength core wire, then tin-plate it on all six strings for added corrosion resistance; because what you don’t see matters! When coupled with our highest quality wrap wire you get consistent true tone that you can count on song after song. Available in 80/20 Bronze and 92/8 Phosphor Bronze.

Martin Authentic Acoustic SP® strings offer excellent tuning stability, corrosion resistance and great playability.

Ships within the U.S. only - Excludes Alaska and Hawaii

List price

$6.49

$6.49

$6.49

$6.49

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$9.49

$9.49

$6.99

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$7.99

$17.99

$17.99

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$6.49 - $18.99

List price

$6.49

$6.49

$6.49

$6.49

$6.49

$9.49

$9.49

$6.99

$6.99

$6.99

$6.99

$6.99

$7.99

$17.99

$17.99

$17.99

$17.99

$18.99

$18.99

$9.99

$6.49 - $18.99

STRING GAUGES AND TENSION
GaugeEBGDAETensionModel
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 .056 193.0 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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