Electro-Harmonix Announces Op-Amp Big Muff Pi Reissue
Electro-Harmonix has announced a reissue of its classic, 1978-era Op-Amp Big Muff Pi pedal.
Sometimes also referred to as the IC or V4 Big Muff, the original circuitry has been faithfully re-created for the reissue, while several practical enhancements have been added including a compact, die-cast chassis and true bypass switching.
The pedal relies on op-amps rather than transistors and three gain stages rather than four, to create its sound. It features standard controls—Sustain, Tone and Volume—plus a Tone toggle switch for bypassing the tone circuit. It comes equipped with a 9V battery or can be powered by an optional 9-volt AC adapter.
The pedal is available now and carries a U.S. street price of $80.90.
For more on EHX, stop by ehx.com.
Get The Pick Newsletter
All the latest guitar news, interviews, lessons, reviews, deals and more, direct to your inbox!
Since 1980, Guitar World has been the ultimate resource for guitarists. Whether you want to learn the techniques employed by your guitar heroes, read about their latest projects or simply need to know which guitar is the right one to buy, Guitar World is the place to look.

“It’s a game-changer for me”: Laney and Nathan East team up for a versatile signature bass head that ends a 40-year wait for the session legend

“I got a long text message praising the amp and talking about tone. I’m like, ‘Holy crap… I think this is Joe Perry!’” Why Silktone’s tube amp range is rapidly gathering big-name fans