Deluxe Bass Big Muff Pi Distortion/Sustainer

The new Deluxe Bass Big Muff is the latest in the line of EHX bass specific effects. It delivers enhancements to the classic Bass Big Muff Pi that are specifically tailored to the needs of the modern bass player and gives you more tone shaping options than ever before.

Featured Videos
To open the full video playlist in YouTube, click here.
To suggest a video, send email to:
From the Blog
Posted 11/10/2016

Evie Dolan originated the role of Katie the bassist in Andrew Lloyd Webber's School of Rock the Musical—first in its off-Broadway run at the Gramercy Theater and then in the original Broadway cast. She did 31 performances in previews and then 384 performances since opening night at the Winter Garden Theatre on December 6, 2015. Evie also recorded the original cast album!

The 12-year old artist took time out from her super busy schedule to give us a peak at two of her favorite bass guitar pedals, the EHX Deluxe Big Muff Pi and Bass Clone.

Follow Evie Dolan at

Follow School of Rock the Musical at

Posted 9/14/2015

The original funk 'n' roll wild child, Bootsy Collins, puts bass in yer face with the EHX Deluxe Bass Big Muff, which he just added to his "Bootzilla" pedal board for some funked up Godzilla-tone.

Posted 7/9/2015

“It’s pretty tough to imagine a dirt box that’s more tailor-made for bassists than the Deluxe Bass Big Muff—it has so many options that bassists crave, in a relatively diminutive box. Let’s list them, shall we? In addition to the ubiquitous Big Muff Volume, Tone and Sustain knobs, there is a control for Blend, an adjustable noise gate, an input pad for passive or active pickups, a footswitchable filter crossover section, a dedicated DI output and a direct output for parallel processing. Of course, features are worthless without good source material, and the Deluxe Bass Big Muff delivers. The core circuit is based on the original green Russian Big Muff, which bassists and guitarists pay top dollar for on the used market. The original Russian Big Muff delivers thunderous, dirty lows despite not being designed specifically for bass guitar. However, the Bass Big Muff is, and it includes a Blend control to coax even more low end from your amp, Simply put, the Deluxe Bass Big Muff is a monster and should be considered if you’ve ever even thought about plucking the bass.” – Nicholas Kula. “7 Thunderous Bass Dirt Boxes.” Tone Report June 25, 2015

Posted 11/24/2014

Simon Smith’s comprehensive look at the Deluxe Bass Big Muff Pi with guitar.

Posted 5/23/2014

Nicolas Bazin shows how huge the Deluxe Bass Big Muff can make you bass guitar in his cover of Steven Wilson’s Luminol.

Posted 3/27/2013

If you’re into bass distortion, check out this review of the new Deluxe Bass Big Muff by

Click here to read the review and watch a video demo

Posted 3/19/2013

Bassist, Mahlon Hawk, explores the new Deluxe Bass Big Muff Pi.

Posted 3/18/2013

The new Deluxe Bass Big Muff Pi is being snagged by bassists across all genres who dig its wicked sound and A to Z feature set. Bass great, Tony Levin, just got his and takes you on a five minute tour of the new pedal.

Posted 2/28/2013

Premier Guitar magazine just reviewed the new Deluxe Bass Big Muff Pi and said: “this pedal is the Big Muff many bassists have been waiting for.”

Read the complete review on their website here

Posted 2/27/2013

DrSmaggs gives a tour of the new Deluxe Bass Big Muff Pi

Posted 1/28/2013

The Deluxe Bass Big Muff Pi is hot and bass guitarists are digging its advanced features tailored specifically to the needs of the modern player. Check out this quick video that takes you through the new pedal.

Posted 12/11/2012

Now shipping! The new Deluxe Bass Big Muff gives you more tone shaping options than ever before. It starts with all the features of the trend setting Bass Big Muff, and delivers enhancements specifically tailored to the needs of the modern bass guitarist.

Submissions to
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:

mouse over image to zoom
Quick Specs
Pad on the input that's switchable between 0dB and -10dB ensures the pedal is optimized for use with both passive and active pickups
Blend allows a player to mix to taste the direct and distorted signals
Three outputs: a 1/4″ effect out, 1/4″ direct (buffered dry) out and XLR DI out give complete control of your output signal and sound
Foot-switchable crossover section with a variable low pass filter on the dry signal and a variable high pass filter on the distorted signal give bassists the ability to sculpt their sound
Crossover circuit, in conjunction with the Blend control, lets you keep the low-end clear and focused and the high-end bright and cutting
Built-in noise gate with an adjust threshold eliminates unwanted noise at any level
Tough and compact die-cast chassis
9-Volt battery included
Optional 9.6DC-2000BI power supply available
Dimensions in inches: 4.75 (w) x 5.75 (l) x 2.5 (h)
Dimensions in mm: 146 (w) x 121 (l) x 64 (h)
Mailing List
Sign up to receive all the latest EHX news
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.
EHX Merch Shop
Show your colors with an EHX t-shirt -- you can even custom design your own shirt from scratch!
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.