3-band param EQ – V2

ParaMetric EQs

Please check out our revised 3-band parametric EQ. Tone at your full control. V2.0 featrures a wide spaced knob layout to allow you easier dial.in of your parameters.

There is also a 1-band parametric EQ und a slim version of the 3-band!

Take me to parametric EQs


They are a great source of information about effect pedals. We have a lot of their designs available as PCBs for you to build an effect b ased on their research!

Visit our runoffgroove section Visit runoffgroove.com

runoffgroove’s Umble¬†

Our special try on the great Dumble amp


Tube Effects

Learn more about tube effects with our great Valv-e-tizer project. Already hundreds of people built this ranging from overdrive to clean. Someone even used two of them to build a HiFi Stereo stage for his music amp.

Visit the tube DIY blog