Bass Big Muff Pi

lukegalea

New member
Is it possible to adapt the Muffin Fuzz (EHX Big Muff Pi) for Bass? I'm originally looking for a Bass Big Muff Pi.
 

Popnfreshbass

Well-known member
Build the Green Russian version listed in the build docs. It is what the bass big muff was inspired by, and frankly, sounds a lot better on bass IMO.
 

treefall

New member
Definitely. Especially since the Muffin is a Big Muff Pi clone with 9 different BoM configurations to better match various Muffs. IMO, The main thing for bass is to make sure that C1 is large enough (greater than the common 0.1uF), since it, along with R2 form a high-pass filter which defines the main low-end response. Other coupling caps (3, 4, 7, 12, 13 - those "inline" with the signal), with higher values will also pass more lows.

It looks like the "Mask Us", "Bigger Muffin" and "Fox" are intended for a lower range. Like Popnfreshbass says though, the Green Russian is likely the predecessor to the "Bass Big Muff".

This site compares many muff models and some of the other Mods and clones including schematics and some component analysis: http://www.bigmuffpage.com/Big_Muff_Pi_versions_schematics_part3.html

Can I just say here, googling "Big Muff" might distract you from your original intent.
 

jrhevron

Member
Also, socket the clipping diodes and try some things out. There are a lot of different variations:
No diodes in first stage: more bass, but may be too much
LED's in both stages: more of a fuzz/hoof sound. Different color LED's clip differently. Red clip quickest with the least amount of headroom. green/blue/violet, the most headroom before clipping.
Silicon in both stages: traditional muff
No diode in second stage: louder more uncompressed muff, but may be too much

I landed on yellow LED's in the first stage and violet in the second.

I also have an Ungula with green LEDs in both stages and that sounds great too. Red were too compressed for me. But socket and see what your ears like.

Also make c10 .01uf for flat/not scooped mids... if you want more guidance on this, check out the kitrae large beaver mid-range switch: http://www.bigmuffpage.com/images/schematics/1976_BMP_Schem_Mids_Switch_Mods.jpg

You can see that c9 and c8 (in this diagram... not sure exactly how they match up with the Muffin) need to be the same for flat mids. Personally, I think that flat mids are enough, esp if you don't want to put in a mids knob.
 
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peccary

Well-known member
Build the Green Russian version listed in the build docs. It is what the bass big muff was inspired by, and frankly, sounds a lot better on bass IMO.
Have you built the J Mascis version? I'm wondering how that sounds with bass if you've had any experience with it.
 

jrhevron

Member
I would think that the J Mascis Fuzz would be too fuzzy and not have enough low end... but I haven't tried one myself!


Here's a board of it: https://www.deadendfx.com/product/trible

Build doc: https://drive.google.com/file/d/1VEhySsGf8St2pYcb_50k34kOBtm0vAyF/view
 
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