Electro-Harmonix OP Amp Big Muff Pi Distortion/Sustainer Pedal

BH #ELOPAMPBM • MFR #OPAMPBM
Electro-Harmonix
Electro-Harmonix OP Amp Big Muff Pi Distortion/Sustainer Pedal
Key Features
  • Reissue of Iconic 1970s Fuzz Pedal
  • Recreation of Original V4 Circuit
  • Volume and Fuzz Knobs
  • Switchable Tone Control
The Electro Harmonix Op-Amp Big Muff is a reissue of a classic fuzz pedal from the 1970s. It aims to give you the iconic and sustaining distortion of that era. Three main controls are at your disposal including a volume knob for overall level, a tone knob to shape your timbre, and of course the fuzz knob with which you can introduce sweet distortion into your signal.
Special Order
Expected availability: 7-14 business days
$80.60

Important Notice

  • This item is noncancelable and nonreturnable.

Electro-Harmonix OP Amp Big Muff Pi Distortion/Sustainer Pedal

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Electro-Harmonix OP Amp Big Muff Pi Overview

The Electro Harmonix Op-Amp Big Muff is a reissue of a classic fuzz pedal from the 1970s. It aims to give you the iconic and sustaining distortion of that era. Three main controls are at your disposal including a volume knob for overall level, a tone knob to shape your timbre, and of course the fuzz knob with which you can introduce sweet distortion into your signal.

The original pedal relied on op-amps rather than transistors to achieve its signature, needling timbre. This pedal aims to recreate that original V4 circuit as faithfully as possible even as it adds a couple of tweaks to the design. For instance, the tone switch, which takes the tone knob out of the circuit altogether, no longer affects your overall output level. This is a departure from earlier iterations.

The Op-Amp Big Muff Pi utilizes true bypass circuitry, to keep your tone pristine when it is bypassed. The pedal ships with a 9V battery, which can be replaced by unscrewing the backplate and accessing the battery therein. It also works with a 9V AC power adapter, which is available separately.

Key Features at a Glance

Volume Knob: This sets the overall the output level.

Fuzz Knob: This knob adjusts the amount of sustain and distortion.

Tone Knob: This control facilitates a range of sounds, from high treble to deep bass. As you turn the knob clockwise, the treble increases and bass decreases.

Tone Switch: This switch removes or adds the tone control from the circuit. This switch has been improved over the original Op-Amp Big Muff, as now the volume remains the same in both positions.

Bypass/Engage Footswitch: The Footswitch toggles between effect and bypass modes.

UPC: 683274012087

Electro-Harmonix OP Amp Big Muff Pi Specs

I/O1/4" instrument input, phone type
1/4" instrument output, phone type
ControlsFuzz knob
Volume knob
Tone knob
Tone switch
Bypass/engage footswitch
BypassTrue bypass circuitry
PowerBattery: 9 V
Power Supply: 9 VDC (available separately)
Dimensions (W x L x H)2.8 x 4.5 x 2.1" / 7.0 x 11.4 x 5.3 cm
WeightNot specified by manufacturer
Packaging Info
Package Weight0.67 lb
Box Dimensions (LxWxH)5.7 x 3.5 x 2.85"
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