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Electro Harmonix Q-Tron Envelope Filter

Electro Harmonix Q-Tron Envelope Filter

By Electro Harmonix

In stock
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The Electro Haromonix Q-tron Envelope Filter is fat, funky and still one of the best on the market.

It is crazy how expressive and responsive this effect is to your picking attack or when you depress a key. It is almost like you are smacking a rubber ball against a wall with a racket. This effect may seem strange at first, but after a few seconds it is really hard to stop and becomes physically addictive.

This is probably why George Clinton and Bootsy Collins have been getting down with this funky box since it's inception. If you are serious about envelope filters you cannot pass up the Q-tron.

It, like so many other effects by EHX, is the benchmark of it's type and absolutely peerless with it's superb signal-to-noise ratio and 24-volt headroom.

Get knee-deep and do the freak with the whole funk and the Q-tron from Electro Harmonix!


  • True bypass
  • Selectable low pass, band pass and high pass filters
  • Resonant peak control to adjust the filter's Q from subtle to dramatic
  • Hi and lo frequency response modes
  • Adjustable gain knob and boost switch
  • Sweep direction switch for up or down filter sweep


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