Since 1974, D'Addario has been the trusted choice for acoustic guitarists seeking superior sound quality. These Phosphor Bronze strings deliver the warm, resonant tone that professionals and enthusiasts demand. Precision-engineered with phosphor bronze wrap wire over a high-carbon steel core, they offer exceptional tonal balance across every musical style. The 12-53 Light gauge strikes the perfect equilibrium between effortless playability and rich, full-bodied sound—making it the go-to choice for serious players. Experience why Phosphor Bronze remains the gold standard in acoustic strings.