Tube-driven 2-channel preamp in pedal form Two-Note's new series of tube-driven preamplifiers in pedal form have many unique features. Le Lead is the pedal with the widest width. Channel A goes from a shimmering clean and open sound at low gain levels, to a nice slightly crunchy overdrive sound when you turn up the gain control. Kanal B is a real "Bad Boy" who is not embarrassed.