FilterFX - filter kit

Item number: 3275

12dB/oct Lowpass/Bandpass/Highpass filter.

Category: Electric Druid kits


starting from 49,00 €

Final price incl. VAT, plus shipping (mitttel)

Available now!

Shipping time: 3-7 Working days


The FilterFX project is a contolled 12dB/oct state variable filter. A state variable filter (SVF) is chosen because this filter design offers highpass, bandpass, and lowpass outputs which gives us the greatest range of different effects. The LFO offers eight waveforms, including two random waveforms (one does those crazy sample-and-hold effects like the Maestro FSH-1).

Read more about the great things this pedal can do here: FilterFX Information. This site also contains some sound samples!

This kit is a creation by in cooperation with If you have any problem with the content of the kits like missing or wrong parts, please contact Musikding (Klaus) at For any technical problem relating to building this project, please contact Tom at

Here´s the parts list: Parts List (BOM)

This kit contains all parts you need to build a fully functional effect pedal. Not included in the kit, but also good to have:

  • Aluminium enclosure: select one from top
  • 9V DC power supply
  • 4 nice knobs for the potentiometer, up to 20mm diameter and for 6.3mm shafts
  • Decal, transfer or transparent sheets for labeling

Here is the very detailed build document:
FilterFX Build docs

Here´s the project page with further information:
FilterFX project page

Effect-Type: EQ/Mix
Instrument: Guitar Bass

Ratings (7)

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Total entries: 4
5 from 5 FilterFX kit

Easy to build. Sounds great. Highly recommended.

., 19.05.2020
5 from 5 Fun build, great support!

Pretty straight forward build. Ran into some issues but got instant and super detailed help from Tom at Electric Druid and works like a charm now. Sounds great, too. Can see this getting a lot of use!

., 16.09.2020
5 from 5 Overwhelmingly recommended!

A great project that gives a great pedal. I wasnt so enthusiastic about the fact that the resonance is limited to a switch, but its a three-way switch and it actually works more than well. The sync-in is the cherry on yhe cake...

., 29.09.2020
5 from 5 Great

It sounds fantastic and has a ton of configuration possibilities. I can not be more happy,

I see you again. Tnx

., 18.03.2021
Total entries: 4

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