Вот что пишет сам Марко Брунетти
1) CLEAN is very warm and big, a little dirty and compressed when you push the gain up to max
2) CRUNCH vintage, not too much pushed. Similar to a Vox overdriven
3) EXTRA is an extra gain an the Crunch, and the sound is overdriven, but for rock and no heavy metal. Very smooth and round tones