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My brother-in-law has a couple of original Big Muffs. I took one of my Muff’n builds over to compare and the original Muffs have a huge amount of volume when compared to the Muff’n (ridiculously louder…). I know the Big Muff circuit is no secret so I have to assume the GPCB boards follow the original circuit with maybe the exception of the diode switch. The question is what make the original Big Muffs soooo unuseably loud?
I have not experienced that difference from Muffs made since the 90’s but that is about it. The oldest one I have is a Russian. You could easily make your Muff’n louder. Perhaps the answer to your question though is here?
Barry, how would I go about making the Muff’n louder? I just built one and I have both the Volume and Sustain dimed for unity volume. I’m checking all my values but I’ve not found anything yet so how would I go about boosting output volume?
Hey Cybercow, I have been looking into that myself. I had some BC550 q’s in stock so I used those. Wondering if the biasing needs to be changed to accommodate this. It sounds killer! Just needs a boost after to recover some volume drop.
Chris you will need to start a new support thread.
You have an issue going on because we simply would not release a circuit that requires you to dime everything to get unity volume.
I know that most of the GPCB circuits are designed to provide AT LEAST unity volume levels at the output. That is so there will not be a change in volume if the pedal is turned on or off while performing. If an increase in volume is desired to perform a solo, then the pedal needs to have the ability to exceed the unity volume level.
It occurs to me that the original MUFF did not consider that the output volume might need to play well with other pedals.
In any case, the output level of the MUFF can be increased by increasing the voltage gain of the last transistor stage. This is approximately the ratio of the collector resistor to the emitter resistor. Increasing the collector resistor value or reducing the emitter resistor value will accomplish this. Using “hotter” transistors with higher Beta values will also help.
Thanks everyone, I have never actually owned a muff or played with one very long so I wasn’t really sure how the volume reacted. I will check out a few things you all posted above and post a new support thread if I can’t get it louder. I was looking through previous posts to see if someone else had a similar question and just jumped on this one.
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