Increase Wah and Vol Expression Range

Many AX1500 and AX1000 owner complain about the Wah and Volume effects. The Wah is often said to be too narrow. The Volume pedal too sensitive. One thing you can do to help your pedal reach its potential is to adjust the pads under the front and back of the pedal.

If you'd like me to mod your pedal for you, visit the Guitar Store.


  1. Remove the thin rubber strip found underneath the back end of the pedal. Use a thin knife blade or screwdriver blade to pry up one corner and it should peel out easily.
  1. Remove the two thick foam pads found underneath the front end of the pedal.

    Cut two small strips from the rubber strip removed in step 1 and glue them to the underside of the front of the pedal as shown.

    To turn a pedal effect on/off, press down on the right side of the pedal. The two layers of rubber on the other side will keep the effect from triggering during regular use.
  1. Stick the narrower of the two foam pads removed in step 2 on the AX1500/AX1000 chassis so that it sits perpendicular to the slot that held the original thin rubber strip.
  1. Recalibrate your Expression Pedal to accept the new start and stop points of its range.
    1. Power up the unit while pressing the Pedal Block and Exit buttons. The LED should read "PEDAL"
    2. When the LED reads "MIN" rock the pedal to its full back position and press the Write button.
    3. When the LED reads "MAX" rock the pedal to its full forward position and press the Write button.
    4. The LED should read "COMPLETE" and then start into play mode.


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