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Author Topic: Low pass filter on a DIY pedal  (Read 3312 times)


  • Chipper
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Low pass filter on a DIY pedal
« on: June 22, 2014, 09:28:05 AM »

I have a DIY fuzz pedal, which is way too bright. I thought it'd make sense to build a fixed low pass filter into it, so that it will sound ok with my regular setup, without having to change the rest of the setup just for this fuzz. So, if you think this is a sound idea:

I know something about LPF's in theory (how to calculate Xc etc.), but I'm not sure where I should place it in the schematic (input or output side), and what other factors I should take into account.

Here's the schematic:


Where should I place the LFP there..?


  • Legendary
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Re: Low pass filter on a DIY pedal
« Reply #1 on: June 23, 2014, 04:45:00 AM »
I'd just keep on sticking caps across the audio path (pick a spot) until it sounds right. (if that is possible with such a basic fuzz circuit :-X)
That 100n across the line is obviously not enough so add another at input of last stage or between the the other caps.


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Re: Low pass filter on a DIY pedal
« Reply #2 on: June 24, 2014, 07:56:43 AM »
If you say theory and practice don't agree you haven't applied enough theory.