- Bronze alloy for brilliance and long lifeStudio-quality performance
Martin M550 Phosphor Bronze Acoustic Guitar Strings are made with a unique composition to give brilliance, clarity, and longevity of sound. The Phosphor Bronze winding alloy is ideally suited for making strings that have deep, rich basses and clear, bright trebles. Martin guitar strings are great for daily use and are wound to precise specifications. Core and wrap wires meet strict requirements to make the grade. Gauges: 13-17-26-35-45-56.