Four-knob guitar pedal interface with pro-level 18-volt operation and MDP technology for exceptional tone across all guitar types.
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Four-knob guitar pedal interface with pro-level 18-volt operation and MDP technology for exceptional tone across all guitar types.

Compact compression and sustainer pedal that evens out dynamics with level, tone, attack, and sustain controls.

Electro-Harmonix Op Amp Big Muff Pi Fuzz / Distortion / Sustainer Pedal. Faithful re-creation of the original late-70s Op-Amp Big Muff Pi! With original late-70s Op-Amp Big Muffs selling for exorbitant prices, Mike Matthews decided to take the power to the people and reissue the classic pedal at a price that players could afford! The circuitry of the new EHX Op-Amp Big Muff Pi —sometimes also referred to as the IC or V4 Big Muff— has been faithfully re-created while several practical enhancements have been added including a compact, die-cast chassis and true bypass switching. “The Op-Amp Big Muff was popularized by the brilliant Billy Corgan who first used it on the Smashing Pumpkins’ epic 1993 album Siamese Dream. After he was videotaped playing and talking about the reissue, Billy stated: ‘The magic’s still in the box, I can still get what I’m looking for!’” – Mike Matthews. The pedal relies on op-amps rather than transistors and three gain stages rather than four, to create its signature sound. It’s a sound that’s been described by noted Big Muff collector and historian, Kit Rae, as: “a huge, crushing Big Muff sound with more crunch… great for grungy, wall-of-sound distortion, heavy rhythm playing and heavy leads.” Product Highlights: A faithful reissue of the original classic circa 1978. Iconic sound and vibe that’s coveted by guitarists. Controls for Tone, Sustain and Volume, plus a Tone Bypass switch. True bypass switching for maximum signal integrity in bypass mode. Rugged, compact, die-cast package... pedalboard friendly. 9V battery included. Product Features: Volume Control: Sets the output level. Sustain Control: Adjusts the amount of sustain and distortion. Tone Control: Provides a range of sounds from high treble to deep bass. Tone Switch: Removes the TONE control from the circuit. Amp Jack: This is the audio output. Input Jack: This is the audio input. Footswitch and Status LED: Toggle between effect bypass modes. When the LED is lit, the effect is active. Product Specifications: Circuit: Analog. Bypass: True Bypass. Audio: Mono. Power Supply: 9V battery included (optional 9.6VDC-200mA power adapter not included). Dimensions (in): 4.5 x 2.75 x 2.1. Current Draw: 5mA. Year Released: 2017. UPC: 683274012087.

Rediscover the legendary tone that started the boutique overdrive revolution with the Warm Audio ODD Box Hard-Clipping Overdrive Pedal. Modeled after one of the most revered and collectible pedals in guitar history, the ODD Box captures every nuance of its inspiration’s dynamic, amp-like drive while improving reliability and flexibility for today’s players. From subtle clean boost to full-blown saturation, this pedal delivers the touch sensitivity, harmonic richness, and midrange presence that have made its predecessor a staple among professional guitarists for decades. The ODD Box’s dual-voice design gives players two distinct tonal flavors at the flick of a switch. In US mode, you’ll enjoy dynamic response, increased headroom, and smooth breakup perfect for blues, rock, and fusion styles. Switch to UK mode for early saturation, boosted gain, and cutting upper mids that channel the grit and chime of classic British amps. Together, these two voicings offer unmatched versatility — whether you’re pushing a clean amp, tightening a dirty channel, or stacking with other drives.Under the hood, the ODD Box is a testament to Warm Audio’s obsession with authentic analog tone. Its through-hole circuit board mirrors the original’s layout and components, using TL082CP op-amps, 2N7000 transistors, and carefully matched resistors and capacitors for vintage-correct response. The result is an overdrive that feels natural and organic, responding dynamically to your pick attack and guitar volume like a real tube amplifier.Built for gigging musicians, the ODD Box features true bypass switching, ensuring your tone remains pure when the pedal is off, and side-mounted thumbscrews that let you swap batteries on the fly without tools. The pedal’s heavy-duty steel enclosure and durable finish guarantee years of reliable performance. Whether you’re chasing transparent boost, creamy sustain, or edge-of-breakup drive, the Warm Audio ODD Box gives you boutique overdrive tone that’s faithful to the original — at a price every guitarist can love.