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

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

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

B&H # ELOPAMPBM MFR # OPAMPBM
Electro-Harmonix OP Amp Big Muff Pi Distortion/Sustainer Pedal

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Product Highlights

  • Reissue of Iconic 1970s Fuzz Pedal
  • Recreation of Original V4 Circuit
  • Volume and Fuzz Knobs
  • Switchable Tone Control
  • Improvements Made for Level Consistency
  • True Bypass Circuitry
  • Ships with 9V Battery
  • Compatible with 9V AC Power Supplies
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Electro-Harmonix OP Amp Big Muff Pi overview

  • 1Description

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
In the Box
Electro-Harmonix OP Amp Big Muff Pi Distortion/Sustainer Pedal
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Electro-Harmonix OP Amp Big Muff Pi specs

    I/O 1/4" instrument input, phone type
    1/4" instrument output, phone type
    Controls Fuzz knob
    Volume knob
    Tone knob
    Tone switch
    Bypass/engage footswitch
    Bypass True bypass circuitry
    Power Battery: 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
    Weight Not specified by manufacturer
    Packaging Info
    Package Weight 0.7 lb
    Box Dimensions (LxWxH) 5.7 x 3.4 x 2.9"

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