The Electro-Harmonix Q-Tron Envelope Controlled Filter is an envelope filter (often called an auto-wah) pedal. Instead of using a foot treadle like a wah pedal, the Q-Tron automatically sweeps a filter based on how hard you play. The louder your input signal, the more the filter opens up. 

  • Drive (Up/Down) – Filter sweeps upward or downward.
  • Peak – Controls resonance and intensity.
  • Norm/Boost – Normal or boosted sensitivity/output.
  • Gain – Adjusts how strongly the pedal responds to your playing.
  • Range (Hi/Lo) – Changes the frequency range emphasized.
  • Mode (LP/BP/HP/Mix) – Selects Low Pass, Band Pass, High Pass, or a blend of filtered and clean signal.  

This item is sold As-Described

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Listed8 days ago
ConditionGood (Used)
Good condition items function properly but may exhibit some wear and tear.Learn more
Brand
Model
  • Q-Tron Envelope Filter
Finish
  • Silver / Black / Teal
Categories
Year
  • 1990s
Pedal Format
  • Standard

Product safety information may be available here.

Baumgartner Bass

Spring Creek, NV, United States
Joined Reverb:2017

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