Martin MA550 Authentic Acoustic SP® Phosphor Bronze Medium Strings (13-56)

Classic Martin Tone, Reliable Performance & Balanced Feel

The Martin MA550 Authentic Acoustic SP Phosphor Bronze Medium Strings are engineered for players who want full, balanced tone with long-lasting performance. Designed with 92/8 phosphor bronze wrap wire and high-tensile strength core, these strings deliver a warm, rich sound with excellent clarity and tuning stability.

Built for consistency and durability, the MA550 set is ideal for players who demand reliable tone across practice, recording, and live performance.

🌟 Key Features

• 92/8 Phosphor Bronze Construction — Warm, balanced tone with rich overtones
• Medium Gauge (.013 – .056) — Strong projection and fuller feel for strumming
• High-Tensile Strength Core Wire — Improved durability and consistent performance
• Tin-Plated Core — Enhanced corrosion resistance and tuning stability
• Superior Performance (SP®) Design — Reliable tone across extended play sessions

🎶 Tone & Performance

The MA550 strings are known for their warm, full-bodied tone with clear highs and tight low end, making them a go-to choice for players who want a balanced acoustic voice. Compared to 80/20 bronze, phosphor bronze produces a slightly darker, more complex tone that works well in both solo and ensemble settings.

The medium gauge provides more volume and projection, making these strings especially popular with dreadnought players, strummers, and flatpickers.

👍 Ideal For

• Acoustic players who prefer fuller tone and stronger tension
• Dreadnought guitars like D-18, D-28, and HD-28
• Strumming and flatpicking styles
• Gigging musicians needing reliable tuning stability
• Players who want classic Martin string feel and tone