DOD FX25 Envelope Filter



  • Range
    Controls the range of movement of the envelopes sweep. Counter-clockwise sweeps more low frequencies. Clockwise sweeps more high frequencies.
  • Sensitivity
    Adjusts the point where the effect's wah responds to your playing attack. With a higher sensitivity a smaller signal will affect the envelopes effect. In other words, with a higher sensitivity you don't have to pluck as hard to make the effect audible.


A famous users of the DOD FX25: Bootsy Collins (Parliament, Funkadelic), Wes Borland (Limp Bizkit),...


The FX25 is an automatic wah wah pedal. You vary the wah by how hard you strike the strings on your guitar. "Range" controls the amount of sweep the wah will give and the "Sensitivity" control sets how much attack is necessary in order to trigger the wah.

a 1990 DOD brochure

The FX25 Envelope Filter is a level dependent wah effect; the louder you play, the higher the wah effect sweeps. Use the FX25 for subtle accompanying or big and bright solos.


myFXDB user reviews

1 review, average score of 10 / 10

2015-08-2310/10  A wonderfully squelchy filter, great bang for your buckvery simple for a filter pedal. If you have a Qtron or similar then there's no point in having one of these

Most recent forum threads


  • Input Impedance
    500K ohms
  • Output Impedance
    1K ohms
  • Filter Frequency Range
  • Filter Q (Range)
    Variable 1-100
  • Gain
  • Size
    5" x 3" x 2"
  • Weight
    1.2 lbs.
fx-25, vfx-25

Where to find one?

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