Martin's Authentic Acoustic SP strings use a higher-tensile, tin-plated core for steadier tuning and a fuller, more balanced tone. The light/medium set sits between the two common gauges, a little more drive than lights without the effort of mediums.
SPECIFICATIONS
Strings
Gauges: .0125, .0165, .0255, .0335, .0435, .055
Wrap: 92/8 phosphor bronze
Core: tin-plated SP







