









Electro-Harmonix Q-Tron Plus Envelope Filter Effect Pedal - Used
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This used Electro-Harmonix pedal will ship insured and inspected from Rapid City, SD. It is in Excellent condition with minor scuffs and dings on the unit and small scratches in the finish on the knobs.
Buy risk free with our 14 day - full refund, less shipping, return policy. Check out our shop policies for more details.
The Electro-Harmonix Q-Tron Plus takes the unmistakable envelope-filter character of the original Q-Tron and adds the flexibility players need to get even more creative. Its dedicated effects loop lets you place another pedal or an entire chain between the Q-Tron Plus’s preamp and filter sections without affecting the envelope drive, opening the door to combinations that can produce everything from funky, vocal-like textures to completely unexpected sounds. With low-pass, band-pass, and high-pass filter options, switchable frequency ranges, adjustable resonance, and selectable up or down sweeps, there’s plenty of room to shape the response to your playing.
The Attack Response switch adds another useful dimension, allowing you to choose between the fast reaction of the original Q-Tron and a slower, smoother response with a more vowel-like character. The gain control and boost switch give you additional control over how hard you drive the filter, while the Blend control and versatile filter section make it easy to find the sweet spot between subtle movement and dramatic, resonant sweeps. True bypass keeps your dry signal clean when the effect is disengaged, and the dedicated send and return connections make integrating the Q-Tron Plus into a larger pedalboard setup straightforward.
Built around an analog circuit and designed for serious experimentation, the Q-Tron Plus is equally at home with funk, soul, rock, electronic textures, and players looking to push an envelope filter somewhere new. Its mono operation, compact footprint, and included 24V power adapter make it easy to work into a pedalboard, while the responsive controls encourage hands-on sound shaping rather than menu diving. Whether you want classic quacking filter tones or a more elaborate effects-chain playground, the Electro-Harmonix Q-Tron Plus gives you the tools to make the filter work exactly the way you want. Available now at Haggerty’s Music.
Features / Specs
Electronics
- Power: 24V DC
- Bypass: True Bypass
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Controls:
- Mode
- LP
- BP
- HP
- MIX
- Response
- Fast
- Slow
- Range
- HI
- LO
- Peak
- Gain
- Boost On/Off
- Mode
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Switching:
- Sweep Up/Down
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Inputs:
- 1/4" Jack, Right Side
- 1/4" FX Return, Right Side
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Outputs:
- 1/4" Jack, Left Side
- 1/4" FX Send, Left Side
Dimensions
- Width: 4.75"
- Height: 2.5"
- Length: 5.75"
- Weight: 1 lb 3 oz
Miscellaneous
- Accessories: Box
- Serial Number: 202210281313
used202210281313
Couldn't load pickup availability
Pickup available at 2520 W Main St
Usually ready in 24 hoursPairs well with

Electro-Harmonix Q-Tron Plus Envelope Filter Effect Pedal - Used
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