Phosphor Bronze was introduced to string making by D'Addario in 1974 and has become synonymous with warm, bright, and well balanced acoustic tone.
D'Addario's most popular acoustic guitar strings.
| Diameter | Tension |
| Item# | Note | inches | mm | lbs | kg |
| PL010 | E | 0.010 | 0.25 | 16.2 | 7.35 |
| PL014 | B | 0.014 | 0.36 | 17.8 | 8.07 |
| PB023 | G | 0.023 | 0.58 | 27.9 | 12.65 |
| PB030 | D | 0.030 | 0.76 | 27.1 | 12.29 |
| PB039 | A | 0.039 | 0.99 | 25.4 | 11.52 |
| PB047 | E | 0.047 | 1.19 | 20.7 | 9.39 |