Electro Harmonix Nano Bass Big Muff Reviews
Tiny but delivers
I'm a fan of smaller pedals and also don't use that many pedals, but ever since I got this one (bit more than half a year), I'm willing to take even more.
This is gig-ready pedal with a sweet spot for fuzz-fun. Not just me, but my band loves this amazing fuzz tone.
What I love:
- knobs don't turn on their own
- fits a small board (like mine)
- simple and to the point (3 knobs, 1 wet/dry switch)
- have incredible and good sustain - once I let it ring almost forever before a come-back
- it does not cut the bass with the fuzz, but my secret sauce is to use a BEQ right after this one and punch a bit more of 50 and 120hz and cut anything above 4000hz ... Incredible sound
What I dislike:
- the footswitch might be harder to flip on sometimes
- depending on the song, is just too much fuzz power for the bass 😅
Overall, I everybody should have this (or bigger).
Once you get to know it, it can be versatile enough to cut through any mix.
I'm curious to get a Rat and see how both would play w/ each other while I have the fun.
Big Muff but small
Excellent Big Muff sound without taking up the space. The option to keep the dry signal and blend with the fuzz sound is an excellent additional feature.
Great Vintage Muff Sound
There are a lot of good fuzz pedals that are suitable for out there and it took me a long time to finally decide which one to buy. Money was never an issue and my primary focus was on the sound and quality. I knew I couldn't take one for a test run, so I had to rely heavily on reviews. I definitely made the right choice. The sound is vintage muff fuzz, without the boom. It is very articulate and can easily be mixed with other pedals. The build quality is excellent and much better than expected considering the price. Overall, worth the gamble and I would recommend this pedal to any bass player looking for a professional vintage fuzz sound. No cons.
A little monster
Perfect for synths 303 style! Creamy and powerful. Small and sturdy. Built like a tank.
Excellent for guitar as well
I got this after seeing a comparison of all the nano muffs and this stood out to me as the most versatile and less noisy. I am using it with a guitar and it works very well, with a sound similar to the green russian as far as I can tell.
One thing I wish this pedal had is a way to control the total volume output when mixing in the clean signal. As it stands when the switch is toggled the pedal outputs the clean signal at a fixed volume and the volume level controls how much distorted signal is added, leading to a total volume that is louder than unity.
Little fuzz box!
Regarding the tone and the sound it's a Big Muff! Don't be fooled by its small appearance, it has all the power and the grit of a typical Muff but condensed into a tiny, very portable box.
It also has a "dry" feature which lets you blend in your clean & dirty signal which is a massive plus (although the lack of a blend knob is the only thing that's missing).
Always comes back home
Have it for a couple of years now and cannot get rid of it.
Everytime I think I'm fed up with the sound of this guy, I just try it in combination with some other guitar, bass, pedals amp and I fall in love with it again.
Just as much power as the big version
I used the Electro Harmonix Big Muff Bass Deluxe and substituted it with this smaller device to have more space on my pedal board. I was very surprised that this little box has just as much power and is even easier to handle.
Can only recommend.
Great for guitar as well
This is being used with a guitar to great effect. Highly recommended.
Great fuzz!
This is very small and easy to use pedal. Love the quality.
It comes with a rechargable EHX battery attached inside.
I use this pedal with Little Mark 250 with a 1x15 markbass cab, result is better than i expected, love the sound, It protects your low end nicely with great punch!
Also I use a HOF reverb and a MXR octave, after PI in the pedal chain. Results are awesome!
Perfect for small and light setups.
Decent fuzz for the price
Obviously not the greatest fuzz in the world but for this price you cannot expect that
I use it with guitars and basses all the time mixed with a dry signal and it sounds fine
Good stuff
I love this muff
The tone of this little effect pedal is amazing, i bought it as a replacement for another pedal and when i play over this little helper, my grin holds for hours!
Great for guitar
This is based off the old green Sovtek Big Muffs. It's a fine representation. It's a bit brighter and grittier than the Russian, but that suits me better. The dry blend switch is a very useful setting for when you want to keep your dry signal in with the fuzz. It's hard to describe a fuzz sound, but I just really like this one. I downsized from a Big Muff Tone Wicker and the Nano can't get as gritty as that, but it doesn't sound too far off. Stacks well with other pedals too. I like it with either a Nano POG before it, or a Soul Food after it. I would definitely recommend this for use with a guitar.
Nice little pedal
I already have a big muff, but the small size of this, as well as the clean mix feature, makes it a useful new pedal. It's been fun to play with the clean/direct signal. I'm using this on guitar, though, rather than bass.
Nice fuzz while keeping the bass sound
Not primarily a bass player, but on those occasions I pick a bass up "live", sometimes I needed more than a straight bass sound. After trying a multi-effect pedal I am much happier with this as my sole "effect" pedal (I put a booster in front though). It is nice because you can blend the original signal in to keep the "bass" whilst adding a really nice "fuzz" to the mix. I could argue that the control marked "sustain" should be called something else, but not sure what and EHX must have a reason.
Great pedal at a great price
Was looking recently for a decent fuzz pedal to add to my rig to give a bit of variation to my boss odb3.
I have always been a fan of electro harmonix but was wary that the last few muff pedals had received mixed reviews. Fear not, the muff nano packs an awesome punch into a suprisingly small package. Rich sounding fuzz with a real evident progression when you increase the sustain.
It's size belies its range and strength and for the price you really can't go wrong. I personally love the sound of Nick Oliveri's bass work for QOTSA which he achieved through a cranked svt amp. This pedal gets that same kind of fuzzy tone so was an instant winner for me. Would definitely recommend and would replace if lost.

Technical Data
- Manufactured by Electro Harmonix
- Released in 2014
- Average price : $96
- Dimensions : 65mm x 110mm x 55mm
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