3 channels in one unit. Clean gong that breaks when you press Crunch. Classic, 'hot-rodded' Crunch with clarity and note definition. Harmonically rich, mid-boosted overdrive, perfect for riffing and lead playing. Patented ISF control: Blackstar's patented ISF control allows you to choose the exact tonal signature you prefer. At the lowest setting, the amplifier has a more American character with a tight bottom end and an aggressive midrange, while at the higher setting, the amplifier has a more British character that is "woodier" and less aggressive. Nine built-in effects: Nine selectable effects can be chosen for each channel, including 3x Chorus, 3x Delay, and 3x Reverb.