Description
Phosphor Bronze Round Core
Phosphor Bronze Round Core combines the rich warmth of premium phosphor bronze with the lively response only a round core construction can deliver. The result is a bigger, more open acoustic voice with exceptional flexibility that lets every nuance of your playing come through naturally.
Built for Expressive Acoustic Playing
Unlike traditional hex-core strings, our round core construction allows the string to vibrate more freely, producing greater harmonic complexity, enhanced sustain, and a noticeably more responsive feel. Wrapped with premium phosphor bronze over specially tempered high-carbon steel round cores, these strings deliver rich acoustic warmth with effortless playability.
Why Players Choose Phosphor Bronze Round Core
- Bigger, more open acoustic voice
- Exceptional flexibility for effortless bends and vibrato
- Greater harmonic bloom and sustain
- Extremely touch-sensitive and expressive
- Made in the USA with premium U.S.-sourced materials
Choose Your Gauge
Lighter gauges provide easier fretting and enhanced responsiveness, while heavier gauges deliver greater volume, stronger attack, and increased projection. Choose the gauge that best complements your guitar, tuning, and playing style.
Acoustic String Gauges
| Set | 1st | 2nd | 3rd | 4th | 5th | 6th | Nickname |
|---|---|---|---|---|---|---|---|
| 10-47 | .010 | .014 | .022 | .030 | .038 | .047 | 10’s |
| 11-50 | .011 | .015 | .022 | .030 | .036 | .050 | 11’s |
| 12-53 | .012 | .016 | .024 | .032 | .042 | .053 | 12’s |
| 13-56 | .013 | .017 | .026 | .036 | .046 | .056 | 13’s |
American String Craftsmanship
Every set of American String guitar strings is built on more than a century of American string-making expertise. From premium U.S.-sourced materials to complete manufacturing control, every detail is engineered to deliver superior tone, exceptional feel, and long-lasting performance.
Ideal For
Phosphor Bronze Round Core is built for acoustic players who want every note to respond as naturally as their touch. Whether you’re playing fingerstyle passages, flatpicking with dynamics, accompanying vocals, or exploring Americana, folk, bluegrass, and singer-songwriter styles, it delivers a richer, more open voice with exceptional flexibility and expressive feel.
