Electro-Harmonix Q-Tron - Envelope Controlled Filter


  • Drive (Up/Down)
    selects direction of filter sweep : upwards or downwards.
  • Norm/Boost
    Normal mode allows setting the Gain control without changing the output volume.
  • Peak
    Determines frequency peak of filter. Makes more "effected sound" when turned up more.
  • Gain
    Functions as both a volume control and a filter sensitivity control in boost mode. In normal mode it acts only as a filter sensitivity control, unlike the Mutron-III which also changes the unit's output volume.
  • Range (Hi/Lo)
    Emphasizes vowel like sounds in low position, overtones in high position.
  • Mode (LP/BP/HP/Mix)
    Select the filter used by the effect: Lowpass, Bandpass, Highpass or a mix of Bandpass with dry unprocessed sound.


Designed by Mike Beigel, inventor of the legendary Mu-Tron III envelope filter.


Improve your Groove!

The Electro-Harmonix Q-Tron - the phattest, funkiest envelope filter ever made! Features like switchable Boost and Filter Mix mode allow for an unlimited supply of all-new auto-wah effects that drip with attitude. Increased frequency response and improved signal-to-noise ratio make the Q-Tron perfect for use with any instrument.

Bootsy Collins and George Clinton already have theirs. How about you?

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