Electro-Harmonix Big Muff PI
Electro-Harmonix Big Muff PI

Big Muff PI, Fuzz pedal from Electro-Harmonix in the Big Muff series.

denied 05/10/2011

Electro-Harmonix Big Muff PI : denied's user review

« Overrated but affordable »

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- Controls for volume, tone, and sustain (gain/clipping)

- Top mounted jacks

- Buffered bypass

- Large classic enclosure

- Lightweight

- Powered by 9v battery or standard Boss style adapter


This one is pretty simple and straightforward to dial in. Tone knob gives a pretty wide range of tones, its worth taking the time to tweak. The sustain knob is really just a gain/clipping control, but yes that obviously adds sustain. '

I wasn't really a fan of the construction on this one. Yes its lightweight, but the enclosure is very thin and doesn't come off as sturdy at all.

The internal build quality is not great. The wiring job is very shabby and I've totally seen these start to fall apart with use.

The bypass is a pretty mediocre buffer, love it or hate it.


To be honest, it doesn't sound that great, especially for the amount that this pedal is hyped up. Yes some of the old ones could produce fantastic tones, but they were also built a lot less consistently. The reissues really just aren't that great. Harsh and gritty, yes its a fuzz, but muffs are a pretty mild fuzz variation and this one fails at creamy tone.

It can do the wall of sound thing pretty well, and as mentioned, the tone knob is pretty versatile. The gain knob will take you from very mild compression to a wall of sound type deal.


Not the best Muff type pedal I've come across. They sound decent, nothing more, nothing less. They go for quite cheap used, so if you are on a budget, its not a bad choice. But personally I would pass. The mediocre, bland sound, coupled with the shoddy build quality and flimsy enclosure just don't do it for me at all.

If you are after a serious nice sounding muff, take a look at Stomp Under Foot. Matt makes great pedals, and has a few modeled after good sounding vintage ones.

As far as I can tell, the hype about the reissue Pi is more about image and reputation than anything else. The sound just isn't there.