Electro-Harmonix XO Micro Q-Tron


  • Drive
    Combination of "Gain" and filter direction?
  • Q
    Determines frequency peak of filter. Makes more "effected sound" when turned up more.
  • Mode (LP/BP/HP)
    Select the filter used by the effect: Lowpass, Bandpass or Highpass.



The Micro Q-Tron is a smooth envelope filter with a funky wah-wah tone. The filter is controlled by its internal envelope follower, analyzing the volume of your notes and the dynamics of your playing to directly sweep the filter's center or cutoff frequency. A stronger attack or louder note will produce a wider frequency sweep while softer playing produces more subtle effects. Use the Q control to make the effect more dramatic.

Electro-Harmonix (2006-2008)

Player controlled dynamics moving a precise multi-mode filter with a sweet adjustable Q make the Micro Q-Tron an amazing envelope follower.


myFXDB user reviews

1 review, average score of 6 / 10

2015-10-25Martin6/10  With right adjustment can give nice soundA bit limited

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envelope-controlled envelope follower amplitude controlled fx pedal stompbox stomp box guitar effects pedal filter eq/excite/filter lowpass lopass lo-pass lp lpf low-pass filter hpf hipass hi-pass highpass hp high-pass filter bandpass bp bpf band-pass filter
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