The Electro-Harmonix Nano Bass Big Muff Pi Fuzz Pedal delivers the huge Bass Big Muff sound in a nano-sized package. Voicing inspired by the tank green Russian Big Muff with the classic Big Muff Pi layout of Sustain, Tone and Volume controls. Controls for Volume, Tone and Sustain let you sculpt your distortion and drive, while the Dry switch mixes your dry bass with the EHX Nano Bass Big Muff’s distortion. Features The Sustain Knob adjusts the amount of sustain and distortion. The Tone Knob provides a range of sounds from high treble to deep bass. As you turn the knob clockwise, treble increases and bass decreases. Vol Knob sets the output level of the distortion effect. When the toggle switch is set to Dry, the volume knob has no effect on the output level of the dry signal. When the Dry Toggle Switch is set to Dry mode, the original dry signal present at the input jack is mixed with the output of the distortion circuit. The 1/4-inch Input jack is the audio input to the Nano Bass Big Muff. The input impedance presented at this jack is 110 kg. The 1/4-inch AMP jack is the audio output from the Nano Bass Big Muff. When the Nano Bass Big Muff is in True Bypass mode, the AMP jack is connected directly to the Input jack. When the LED is lit, the Nano Bass Big Muff effect is active. When the LED is off, the Nano Bass Big Muff is in True Bypass mode. The Footswitch toggles between effect and bypass modes.