Acoustic Guitar String Shootout - Coated vs Phosphor Bronze vs 80/20 - D'Addario - YouTube
D'Addario PB042 Phosphor Bronze Acoustic String, .042 gauge, Single
Acoustic String Comparison: 80/20 vs. Phosphor Bronze - YouTube
Amazon.com: D'Addario EXP17 Coated Phosphor Bronze Acoustic Guitar Strings, Light, 13-56 – Offers a Warm, Bright and Well-Balanced Acoustic Tone and 4x Longer Life - With NY Steel for Strength and Pitch