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.

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

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.

Related Questions and Answers

Q: 1. Has anyone used this boom with a Broncolor Para 133 and strobe..? How stable & well does the boom do.

A: This would not be recommended for use with a Para 133.

Q: 2. It says they fit some but not all Gitzo tripods. Will these fit my Gitzo GT 2531 series 2 tripod?

A: The GSF50 replaces the following tripods foots G1220.G130B3 and G1410.G130B3.

Q: 3. will this fit a GM5561T?

A: Yes. This will fit the Gitzo GM5561T Monopod.

Q: 4. How do you recharge the GB50 on 110 V house current and how long does it take to recharge?

A: Charges on AC power in 4.5-18 hours

Q: 5. How long is the Cigarette Lighter Plug cable?

A: Very short. Only sticks out from the body about 1-inch.

Q: 6. The description says, "The unit can be fully recharged and ready for jump-starting or topping off devices in 7-28 hours on AC power." Does this unit include an AC power source? It's not listed under "In the Box" nor under "Accessories." Can you recommend an AC charger from B&H for this unit? Thank you!

A: This includes the XGC adapter and extension cable, which allows you to charge the unit via the 12v cigarette lighter in the automobile. It also can be charged via the USB port.

Q: 7. Will this fit on either versions of the Video Mic Pro? I have the first version, with less effective shockmount.

A: The Rode Dead Cat VMP is designed to fit the original (first) VideoMic Pro with rubber band based mount only.

Q: 8. Will these work on the Gitzo GM2541 monopod?

A: No, the Gitzo GSF50 50mm Big Foot does not fit on the Gitzo GM2541 monopod. The one that did is discontinued. It had the mfr number of, G1220.130B

Q: 9. Does this feet RRS tripods?

A: These will fit into any tripods with a 3/8 socket.

Q: 10. Will these work with the Gitzo GT 1545T?

A: The Gitzo GSF50M 50mm Big Foot for Select Gitzo Tripods or Monopods are compatible with the Gitzo GIGT1545T Traveler Series 1 Carbon Fiber Tripod.