Electro Harmonix Big Muff PI USA

Incredible sustain.
I was half expecting it to be noisy but it's not.
All in all it's a great sound.
I really like it.

I dropped one star because there's no English manual. Just German, even though the box has English writing on it.
When I opened the battery enclosure, I found a battery in there already fully connected. Also, there was no silica gel bag in the box. It did make me wonder if I had been sent out a used pedal, even though I paid for a brand new one.

Marshall DSL1, 2x12 v30, emg81 (volume pot only) = bright and cutting tone.

Ultra gain channel with a little gain (9 o'clock)

All muffs @ 12 o'clock, except for big box muff, slightly more as it is quieter

1. Russian = the fattest mofo around but still clear enough to hear chords and different strings. It feels like the 3rd channel I wish I had in my amp. Absolutely massive sound but it doesn't loose too much definition/ A little muddier Dual Rectifier kind of thing



2. Ram's head = very similar to Russian but it has less definition and goes more towards OG triangle in terms of mud. Still very powerful and bassy

3. op amp = thin/cutting like a razor, weird sounding offspring. Loved it because it had its own character and was amazing for cutting. It chocks on chords and notes definition

4. triangle = OG, super loud. I liked it the best on clean channel as it was super powerful sounding, fizzy fuzzy but still very punchy

5. big box big muff USA (writing only) = the reason I have ordered other muffs... It was just chocking all over the place on ultra gain channel (dirty). There was basically no definition of notes nor chords but... I loved it the most of single strings/notes solo stuff. Super creamy, very pleasant and compressed. I liked it so much that I had big trouble to let it go... For solos it was amazing.


I was seriously debating leaving all 5 muffs with me... They are all different, altought 4 & 5 very very similar with triangle having slightly more note definitions and more punch. Though 4 with super creamy solo/single string was super hard to forget about.


I don't think there's a wrong choice here. They behave/sound so different with different amps, guitars, etc. that it's just impossible to decide which to get...


If you have a dark very fat sounding amp like Dual Rectifier/similar I would definitely pick op amp as it cuts the best.

Mind you, this is all on ULTRA GAIN channel on my amp which has tons of gain on tap already.

On clean channel they all sound very similar. Op amp has its own character which is super cool and I already miss it (both on dirt and clean channel)...

Triangle was the punchiest and most powerful on clean channel. Big box muff was almost exactly the same. Ram's head and Russian too but they were much better on dirt channel for my FAT MASSIVE tone needs.

On clean channel I would go TRIANGLE. Op amp is cool on either, it has its own character but it chokes on already dirty channel not as much as big box muff and triangle but still, similar to ram's head but ram's head sounds more pleasant overall


Ram's head is like the best of both worlds TRIANGLE <> Russian.

It sits in the middle. Big bassy but chockes a little, but still define. I had a hard time deciding between Russian and Ram's head as they were super similar. Ram's head was a little less defined so I went with Russian as I am using it as a fake 3rd MASSIVE channel on my DSL1.



You can't go wrong with either~!! I was for days thinking about leaving all of them for different scenarios... They are all super amazing pedal with their own character. There's no better/worse. All lovely./

Quite a few pedals are quintessential, But when you factor in price range, history, and character, not many are in the Big Muff category. You could, of course, get a few bucks more and get one of the variants, but if you're not that interested in pedalboard real estate, or after the very specific sound and are just interested in the Big Muff fuzz sound, this is arguably the best option for you, save maybe for some DIY clones. It's currently being used for some fun Seattle-style grunge sounds, but it fits right at home with anything that you want to do with a wall-of-sound type tone, or some very interesting dark, jazzy melodic work when the guitar shouldn't sound entirely like a guitar (just the tiniest bit alien).
It is, though, very full of character, and you can always recognize a Muff style pedal from a mile away in most mixes. Never met anyone who actually didn't like the sound, but I'm sure you're out there. It does play very well with synths as well as electric guitar (been using it also on some melodies with my Korg Minilogue XD, and it makes it sound like a very peculiar guitar some of the time).
And, as a cherry on the cake, it's also a fun pedal to mod, which is why I got two of them. The big box makes it so you can fit almost anything inside it and it won't get really cramped. So if you're not totally convinced on the sound, but get intrigued by it's spirit, change stuff around! Swap in resistors, take away diodes, or even take away one of the gain stages. All in all, in my opinion you can never go wrong with this piece of history, and everyone should have one in their arsenal.

It's a big pedal and it takes up a lot of real estate on your board. The circuit has a tendency to get noisy and be sensitive to "dirty" power coming from the power supply. Those are the downsides.

The upside is the absolutely iconic and unmistakeable sound of this legendary pedal. It's a wonderful and "brutal" fuzz sound!

And let's be honest, once the pedal is on and the amp is cranked - are you really gonna notice a bit of background hum?