It's really amazing how long these strings retain their sound volume. As you can already speak of superior quality because the timbres remain despite daily playing even get fully after weeks and forfeit anything. My Fender F-230 CE Acoustic Guitar sounds wonderfully warm and full. The phosphor bronze strings produce a warmer sound than just a bronze-string and the specially developed by Elixir sheathing each string extends the life of a sentence may order several months. Beautiful litter of Elixir !!!