Skip to main content
Please log in to rate Already rated

Efektor WF3607 Wah Filter

Wah Filter FX Engine


  • • Authentic pedal FX design
  • • 6 Filter/Wah types
  • • More parameters to play!

Video clips

Audio examples


Designed to mimic the “wa wa” sound from a Wah pedal. WF3607 features 6 modes of filtering effect taken from the familiar crying-baby sound to synth-like filters.

Product details

In the 1920s guitar players were fascinated by the “wa wa wa” sound made by trumpet players by opening and closing their mutes. Its filtering effect alters the resonance of the instrument and it feels to increase the expressiveness of playing.

More than 40 years later, an accidental invention resulted in a device that forever changes the sound of guitar. This pedal eventually known as the Cry Baby. Next, in the 1970s, an aborted synthesizer project resulted in an similar “wah wah” effect, which later known as Mu-Tron III envelope filter. These two devices revolutionized almost every genre of music as we know it today.

Select from 6 types filter modes:

  • CB: Dunlop™ Cry Baby*

  • VG: Vox™ Grey Wah*

  • AX: Vertex™ Axis Wah*

  • MuLP: Mu-Tron™ Low Pass*

  • MuBP: Mu-Tron™ Band Pass*

  • MuHP: Mu-Tron™ High Pass*


  • Three types of wah and three envelope filters.

  • More parameters to tweak than regular wah pedals

  • Bypass button

  • Stereo linking

  • Plug a MIDI expression pedal for true wah-wah rocking action

version 1.0.1

  • Q parameter bug on MuHP type fixed

  • Minor internal code edit

*Disclaimer: All trademarks are the property of their respective owners which are in no way associated or affiliated with Kuassa. The manufacturer names and model designations are used solely to identify the products whose tonal and sound characteristics were studied during development.



Released: 2019-10-11
Version: 1.0.1