Phosphor Bronze wound strings were introduced in the early Seventies and have become the most popular acoustic string. Phosphor bronze wire is made from approximately 92% copper, 7% zinc and 1% phosphorous. Phosphor Bronze provides nice highs and lows with pleasant subtle overtones. Phosphorous is used to help reduce tarnish and corrosion
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12 to 56 Bluegrass phosphor bronze
A dozen years ago or so Larry Gruber introduced me to Mangan guitar strings and i eventually settled on the 12 to 56 Bluegrass phosphor bronze for my '77 Sigma dreadnought. I have compared and demo'd at least a half dozen competitive brands and styles and to this day i find the Mangan strings virtually irreplaceable.