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Authentic Acoustic | Understanding our new string lineupplay button

Authentic Acoustic | Understanding our new string lineup


collapse expand iconDescription

The Martin MA540 SP Phosphor Bronze Light Authentic Acoustic Guitar Strings, superior performance strings engineered with the performer in mind and always stand up to rigorous practice and performance schedules. Martin starts with their highest tensile-strength core wire, then tin-plates it on all six strings for added corrosion resistance; because what you don't see matters. When coupled with the highest quality wrap wire you get consistent true tone that you can count on song after song.

Phosphor Bronze Wrap for Warm, Rich Tone

The MA540 SP features Martin's proprietary 92/8 phosphor bronze wrap wire. Phosphor bronze produces a warm, rich tone that mellows with age and use. The phosphor in the alloy helps protect the string from tarnish and corrosion, ensuring long life and consistent performance. The light gauge—.012-.054—is a versatile size well-suited to many playing styles.

Tin-Plated High-Tensile Core

At the heart of the MA540 SP are Martin's tin-plated high-tensile core wires. The tin plating prevents corrosion while the high-tensile wire provides maximum string stability under tension. Together they enable crisp tone, tuning stability, and long string life.

Handmade for Superior Quality

Like all Martin strings, the MA540 SP are handmade to the highest standards of quality. Martin's string makers have been crafting the finest acoustic guitar strings for over 180 years. Their time-tested methods and obsessive attention to detail result in strings that inspire the world's most discerning musicians.

Versatile and Road-Tested

The Martin MA540 SP Phosphor Bronze Light strings are a versatile, road-tested choice for players of many styles. Their warm and balanced tone works equally well for strumming, flatpicking, and fingerpicking. And their corrosion-resistant phosphor bronze wrap and tin-plated core stand up well to heavy use and sweaty stage conditions. For acoustic tone and performance you can rely on, choose Martin MA540 SP strings.

collapse expand iconFeatures

  • Excellent tune stability
  • Engineered to resist corrosion
  • Great playability