G-Series pedals are all-analog recreations of Revv's Generator 120 amplifier channels, serving as preamps or "amp in a box" pedals. The limited edition Anniversary Series features circuit revisions from ten years of amplifier and six years of pedal development for an organic feel. The G4 model, based on the Red Channel, delivers thick high gain with fat single notes for classic tones and modern rock chording, while improving versatility in lower gain settings and midrange clarity.
G4 has 3 Aggression voices controlled by the center toggle switch. While they can be broadly thought of as controlling the amount of distortion (Off = least, Blue = medium, Red = most), these 3 voices substantially alter the performance of the pedal. Even set to Off, G4 has a healthy amount of crunch, so listen for the changing character of the saturation between modes.