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D'Addario was the first to use Phosphor Bronze in acoustic guitar strings back in 1974. Today, Phosphor Bronze is played throughout the world and considered to be the standard in acoustic strings, thanks to its beautiful sonic balance and tonal warmth.

D’Addario was the first company to introduce Phosphor Bronze for acoustic guitar strings in 1974. Today, this alloy is used worldwide and is considered the standard for acoustic strings, thanks to its balanced sound and warm tonal character.