Part of a major revamp of Martin’s range of Acoustic Guitar strings, the MA540 Authentic Acoustic SP set replaces both the original M540 and MSP4100 sets. Now available from Merchant City Music, online and in our Glasgow store, we ship fast to the UK and Europe.

These strings have been engineered with the performer in mind and are designed to stand up to rigorous practice and performance schedules. Martin start with their 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 Martin’s highest quality wrap wire you get consistent true tone that you can count on song after song.

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