Martin M140 — 80/20 Bronze Light Acoustic Guitar Strings

Martin's M140 strings have earned their reputation by keeping things straightforward: quality materials, precise winding, and consistent tone. The 80/20 bronze alloy — 80% copper, 20% zinc — produces the bright, resonant character that acoustic guitarists have relied on for decades, with clear trebles and deep, well-defined bass response.

Key Features

• 80/20 bronze composition for natural brightness and acoustic clarity
• Light gauge for comfortable playability and reduced finger fatigue
• Deep, rich bass response with clear, projecting trebles
• Core and wrap wires manufactured to strict quality standards
• Precisely wound for stable intonation across the full fretboard
• Packaged for everyday use and regular string changes

Ideal For

The M140s are a reliable go-to for acoustic guitarists who play often and need strings that perform consistently session after session. The light gauge works especially well for fingerpicking, folk, country, and singer-songwriter styles where articulation and touch sensitivity matter.