Curt Mangan make premium quality guitar strings without the premium price tag, and these phosphor bronze acoustic guitar strings are no exception. Based out of Colorado USA, Curt Mangan are a small company making all their strings out of USA made wire with an emphasis on providing "big tone". Phosphor bronze strings have a warmer, darker tone with great durability so you won't have to change strings too often!
Here's What Curt Mangan Say About Their Phosphor Bronze Acoustic Guitar Strings:
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.