Electro-Harmonix Blog

Posted 12/11/2017

Electro-Harmonix has reissued their late-1970s era Op-Amp Big Muff Pi. Sometimes also referred to as the IC or V4 Big Muff, the original circuitry has been faithfully re-created while several practical enhancements have been added including a compact, die-cast chassis and true bypass switching.

According to Electro-Harmonix founder, Mike Matthews, “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!’

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."

The Op-Amp Big Muff Pi features standard controls: Sustain, Tone and Volume, plus a Tone switch for bypassing the tone circuit. It comes equipped with a 9V battery or can be powered by an optional 9-volt AC adapter.

Posted 12/5/2017

"Since he started his company [Electro-Harmonix] in 1968, Mike [Matthews] has been one of the leaders in producing effect units for bass and guitar, a job he continues to relish today at age 75." | Bass Player Magazine

Click here to read the full interview.

Posted 12/4/2017

Vote for the Electro-Harmonix Canyon Delay & Looper as this year's MusicRadar and Total Guitar Magazine Best New Guitar Effects Pedal!

Click here to vote now.

Posted 11/28/2017

The funk master, Bootsy Collins, with his EHX C9 organ machine.

Posted 11/22/2017

Music Radar talks effects units old and new with Electro-Harmonix founder, Mike Matthews.

Click here to read the full interview.

Posted 11/21/2017

Bjørn Riis of Gilmourish.com relies on his new Green Russian Big Muff to re-create some of David Gilmour's greatest riffs. You won't believe your ears!

Click here to read the full review.

Posted 11/21/2017

Andy takes a deep dive into the complex psyche of the EHX Superego+. This pedal combines the freeze features and synth sounds of the original with five triggering modes plus onboard effects for an all-in-one soundscape machine.

See More Blog Posts
Submissions to EHX.com
Do you have something that you'd like to share with the Electro-Harmonix community? (a tip on getting a great sound, a cool site, a video, or whatever?) Please send your suggestions to:
The EHX Community
Here are a few easy ways to stay informed on the latest news from Electro-Harmonix...
Forums (Discussion & Support)
Have a question, comment, suggestion? Come join the EHX Forums! You'll meet EHX staff and knowledgeable users from around the world.

Show your colors with genuine EHX tee shirts and authentic Electro-Harmonix accessories!
EHX Products
Our new EH Strings allow you to capture every nuance of your playing style with lightning fast playability. Made of a pure nickel wrap with a specially-selected stainless steel, these sweet-sounding round wounds are truly like no other strings you've played. Not only do they last longer and stay in tune longer, but we think they're the best sounding strings ever made. Available in 9s, 10s and 11s.
Did you know that Electro-Harmonix makes many of the world's greatest vacuum tubes? The next time you need to re-tube your guitar, bass, or hi-fi amp, be sure to insist on getting authentic Electro-Harmonix tubes.