Premium Martin Tone with Power, Projection & Extended Lifespan
The Martin MP550T Era Medium Phosphor Bronze Strings are built for players who want maximum volume, projection, and durability without sacrificing feel. Designed with Martin’s latest string innovations, these strings combine Lifespan® corrosion resistance, Flexible Core construction, and silk-wrapped ball ends to deliver a premium playing experience with vintage inspiration.
With a medium gauge (13–56), the MP550T set offers increased tension and power—perfect for strong strummers and players who demand bold acoustic presence.
Phosphor Bronze Construction (92/8 Alloy) — Produces warm lows, rich mids, and crisp highs with excellent balance.
Lifespan® Treatment — Advanced anti-corrosion technology keeps strings sounding fresh longer.
Flexible Core Design — Enhances playability and reduces finger fatigue despite heavier gauge.
Silk-Wrapped Ball Ends — Protects the bridge and adds a premium vintage touch.
Medium Gauge (13–56) — Increased tension for stronger projection, volume, and tuning stability.
Consistent Martin Quality — Built to deliver reliable tone and performance for studio and stage.
The MP550T strings deliver a full, powerful acoustic voice with enhanced projection and headroom. The medium gauge provides a strong low-end response and greater dynamic range, making these strings ideal for aggressive strumming, flatpicking, and ensemble playing.
Thanks to the Flexible Core design, they maintain comfort and responsiveness, offering a smoother feel than traditional medium strings while still delivering maximum output.
Acoustic players who want more volume and projection
Strummers and flatpickers
Bluegrass, country, and rock acoustic styles
Players who prefer heavier gauge strings (13–56)
Gigging musicians needing long-lasting tone
