Description
Ernie Ball’s Earthwood Custom Medium set wraps a phosphor bronze alloy—92% copper, 7.7% tin, and 0.3% phosphorus—around a tin-plated, hex-shaped steel core wire. That hex core gives each string a firm grip and consistent winding, so the set stays stable and holds its intonation string after string.
The phosphor bronze wrap gives these strings their signature light orange-gold hue, along with a tonal character that leans mellow and warm rather than bright. Despite that mellow voice, the alloy’s tin and phosphorus content keeps the sound articulate, so notes ring out clearly instead of getting muddy, whether you’re strumming full chords or picking out single lines.
Custom Medium gauge sits above lighter sets, giving your guitar a bit more string tension and low-end push while still remaining comfortable to fret. It’s a solid choice for players who want extra volume and sustain from their acoustic without jumping all the way up to heavy strings.
- Gauges: .0125, .0165, .024w, .034, .046, .056
- Alloy: 92% copper / 7.7% tin / 0.3% phosphorus wrap wire
- Core: tin-plated, hex-shaped steel
- Tone: warm and mellow with clear articulation
- Set type: Earthwood Custom Medium acoustic guitar strings






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