The factory rigorously conducts comprehensive quality checks and uses phosphor bronze strings under the Elixir brand, which are durable, standard metal tone, smooth to the touch and greatly reduce the frequency of string changes. Germany's Plek equipment handles the fret work to achieve low chord distances that are not fuzz and feel comfortable. You can choose to load the Double S1-PRO plus vibration pick-up, a dual pick-up system that displays finger-style details to add spatial stereo and dynamic sense to music.