1 of 2 people found the following review helpful
Martin medium SPs are good,
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This review is from: Martin SP Lifespan 92/8 Phosphor Medium Gauge Acoustic (.013 - .056) (Electronics)
As part of a long term ongoing comparison for perhaps 30 hours per week acoustic rhythm I have worked with a number of makers strings. The comparison is important for those of us who do not have resources to change strings after every four hour session. In this the Martin 92/8 SP 13s have come out creditably. The journey continues.