Electro-Harmonix Bass Big Muff Pi Bass Fuzz Pedal

Bass Fuzz Pedal
5/5 18 Write review Item ID: BassBigMuff
Electro-Harmonix Bass Big Muff Pi Bass Fuzz Pedal image 1
Electro-Harmonix Bass Big Muff Pi Bass Fuzz Pedal image 1
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Electro-Harmonix Bass Big Muff Pi Bass Fuzz Pedal
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Big Fuzz Tones for Bass!

The Electro-Harmonix Bass Big Muff Pi draws on two classic Muffs that bassists have long used to create cutting fuzz tones. The Bass Big Muff Pi creates tones similar to the classic fuzz sounds of the battle-tank green Sovtek Big Muff Pi and the legendary Electro-Harmonix Big Muff Pi from the '70s - but optimized for beefy bottom-end that punches through anything. A direct out lets you feed unaffected signal to a second amp or effects chain and a Bass Boost/Dry toggle adds bottom to the Bass Big Muff Pi's sound.

Electro-Harmonix Bass Big Muff Pi Features at a Glance:
  • Tone, Volume, and Sustain knobs
  • Dual output - Normal, affected signal or dry, direct signal for feeding second amp or effects chain
  • Bass Boost/Dry toggle to increase low-frequency content
  • Thick fuzz tones optimized for bass
Electro-Harmonix Bass Big Muff Pi - Break new sonic ground!

Tech Specs

Pedal Type Bass Fuzz
Inputs 1 x Instrument
Outputs 1 x 1/4" dry out, 1 x 1/4" effect out
Batteries 1 x 9V
Height 3.2"
Width 5.6"
Depth 6.2"
Weight 1 lb
Power Supply Included No
Manufacturer Part Number BASS BM

Customer Reviews

Based on 18 reviews
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Sounds great with a guitar too!

I bought this pedal because my Dunlop Fuzzface just wasn't giving me the tone I was looking for... But this thing sounds GREAT! Very close to the Sovtek Russian big muff. I can get all the tones I need from this pedal. Great for both guitar and bass!
Music background: Huh?

Big Muff = big sound

Really great pedal, does exactly what I expected and more! I was using an older guitar version of the Bg Muff and it just wasn't cutting the mustard. This pedal has far more functionality and sounds awesome! For that Muse sound this is a must!
Music background: Gigging musician


I honestly can't believe how much I enjoy this pedal. The sound is incredible, and my favorite part is that my bottom end stays, I can make it push really hard and keep my low end? LOVE IT! I personally like the switch in the dry position, so my regular tone comes through but I get that fuzz layer on top of it too. I have found that if I fuzz out my tone too hard and I don't have that regular bass tone in there too, I get lost in the guitars and their tones. But with this pedal sound layered in, it just adds the drive I want without compromising my clarity. I've tried a couple other bass dist. boxes and they all sounded 'meh, whatever' but the moment I started messing with this one, I knew that was what I wanted. I guess this isn't really letting you know what the tone sounds like, but it's so easy to get what you want with it that you need to get one and find out for yourself.
Music background: Loving it, Learning it, Living it.

Entirely too much fun

Simply a great pedal. I always keep the mini switch in dry mode. It's great in low blend and sustain settings, for adding overtones, or just fraying your tone a little. And of course it can completely fuzz out if that's what you want. It reacts beautifully with my all-tube amp, and if i switch to the drive channel on my head, it makes a throaty crunch that tapers off into the finer distortion of the muff. The sustain knob is also pretty foot-friendly for rolling your gain in a solo. I never use the normal or bass boost modes for bass, but I have run a guitar through it in normal mode and it sounded really good for anything that calls for an ultra-distorted tone. I have read comments by guitarist that say the normal mode does not sound exactly like the classic big muff, but I wouldn't know. Very good buy, sturdy build, good tone, and pedals don't get much cheaper than this.
Music background: Gigging bassist


I use this pedal with a SansAmp Bass Driver DI and get amazing results. I love the many different types of distortion I can generate from the Big Muff. It makes my bass really stand out during solos AND helps me really cut through a mix without killing my deep bass tone. This is my favourite bass distortion pedal to date. It is solid and the control pots are of good quality all roll with a nice smooth, solid feel. I think this pedal is priced very well, also. I have always been impressed with E-H products and this pedal is another example of their quality and great tone!
Music background: Active, gigging Bassist, sound engineer, home recording
See also: Bass Effects, Electro-Harmonix, Electro-Harmonix Bass Guitar Pedals & Effects