It mean that can make sound from soft distortion to loud distortion sound like ＭＥＳＡ ＢＯＯＧＩＥ MARK IV Amp.Gain1 increases treble distortion,adjust the former level of distortion Gain2 controls the amount of bass distortion, adjust the saturation level of distortion
FZ-12 is combination of vintage and modern distortion sound, having 3 options which is ideal for both vintage sound and modern sound.Biyang Classic Series Fuzz FZ-12 Guitar Effect Pedal Three types Fuzz tone Ture Bypass
UX HG-6 Modern High Gain Effect Pedal is very high gain that makes the distortion sound aggressive. True bypass.Very high gain makes the distortion sound aggressive3 gain stages fully discrete circuit. FET simulate the characteristic distortion of tube amplifier