Acoustic guitar strings and the difference in tone
If you are looking for acoustic guitar strings and mainly want to know the difference between Bronze and Phosphor Bronze, the information around D'addario EJ10 explains it clearly. 80/20 Bronze strings are made from 80% copper and 20% zinc and are known for their bright tone and pronounced copper sound, which becomes warmer with longer playing.
Phosphor Bronze acoustic strings are made from 92% copper and 8% zinc. This version gives a rich, bright and warm tone, with a slightly warmer character than 80/20 strings, while the sound remains more consistent over time.
D'addario and string-making tradition
D'addario builds on a long family history that goes back to Salle in the province of Pescara, where string making had been an important craft for generations. What started with gut strings for instruments such as bowed strings and harps grew during the twentieth century into the production of guitar and nylon strings and later steel strings as well.
Since 1974, the strings have been marketed under the D'Addario name. That background makes D'addario a familiar choice for many guitarists when you want a new set of strings for your acoustic guitar.