The Electro-Harmonix Nano Metal Muff Distortion Pedal was built for the player who demands nothing less than hard-hitting distortion and an intense, aggressive sound. It’s a combination of weaponized distortion and an extremely powerful EQ section that provides all the flexibility and tone-shaping needed to dial in an array of ultra-heavy sounds.Noise GateThe Nano Metal Muff’s newly designed noise gate is a superb addition to this high-gain pedal and eliminates unwanted hum when you stop playing. It features a noise floor threshold control (GATE) and its LED to indicate when the gate is engaged.Compact and Straight Forward Controls and Volume KnobA compact footprint and intelligent, straightforward controls complete the picture. This volume knob sets the overall output level.Gate KnobIt removes unwanted hum by adjusting the noise floor threshold. The gate mutes the Output jack when the signal at the INPUT jack is below the threshold setting of the GATE knob. As GATE is turned clockwise, a louder guitar signal at the INPUT jack is required to unmute the OUTPUT jack. Set GATE fully counter-clockwise to disable.Distortion Knob and Treble KnobIt adjusts the amount of distortion and saturation. Turn clockwise for more saturation.The treble knob provides up to 10dB of cut and boosts in the treble frequency range.MID Knob and Bass KnobIt provides up to 15dB of cut and boosts in the middle-frequency range. The Bass Knob provides up to 14dB of cut and boosts in the bass frequency range.Output JackThis 1/4-Inch jack is the audio output from the Nano Metal Muff. In Bypass mode, the OUTPUT jack is connected to the INPUT jack through a buffer circuit. The output impedance at the OUTPUT Jack is 600 mm.Bypass Footswitch and Status LEDIt toggled the Nano Metal Muff between effect and buffered bypass. The STATUS LED light when the pedal is engaged.Input JackThis 1/4 inch is the audio input to the Nano Metal Muff. The input impedance presented at the INPUT jack is 1MM.