Ernie Ball Earthwood 80/20 Custom Medium Bronze Acoustic Guitar Strings 12.5-56

Made from 80% copper and 20% zinc, these strings are wrapped around a brass-plated steel hex core to produce a balanced tone with crisp highs, pleasing midrange, and robust low end. The medium gauge—.012.5 to .056″—provides stable intonation and tuning for most acoustic guitars. Whether recording in the studio or performing on stage, the Earthwood 80/20 strings enable guitarists to explore the full tonal range of their instrument.

Copper and Zinc Alloy for Warmth and Clarity

The 80/20 copper-zinc alloy wrap wire is the ideal combination of warmth and clarity. The copper provides a full, rounded tone, while the zinc adds articulation and note definition. Together, they create acoustic strings that cut through mixes with bell-like highs and mids yet retain a lush, resonant low end.

Hex Core for tuning Stability

At the heart of the Earthwood 80/20 strings is a brass-plated steel hex core wire. The hex shape helps the strings retain their circularity, which improves tuning stability, intonation, and sustain. The brass plating also adds warmth and richness to the tone.

Medium Gage for Versatility

With gages ranging from .012″ to .056″, the Earthwood 80/20 Custom Medium set suits a wide range of acoustic guitars and playing styles. The lighter first and second strings facilitate intricate fingerpicking and solos in the higher registers. The heavier bass strings provide a solid foundation for strumming full chords. This versatility makes these strings a great all-purpose choice for acoustic guitarists.

Long-Lasting, Handmade Quality

Like all Ernie Ball strings, the Earthwood 80/20 Custom Medium Bronze acoustic guitar strings are handmade in California using state-of-the-art manufacturing processes. Ernie Ball is dedicated to producing high-quality, long-lasting strings with superb intonation, so guitarists can rely on these strings to deliver peak tone and performance.