Pricing and availability

We compare 600+ stores and found this item at 9 stores. Prices updated .

Sweetwater
4.5 (10)
$192.30
Guitar Center
4.0 (7)
$192.30
Amazon
4.0 (49)
$192.30
Reverb
5.0 (5)
$159.08 10 available Used
Musician's Friend
4.0 (10)
$192.30
Thomann
4.5 (61)
$165.00 $164.00 $1.00 · All time low
Gear4Music
£170.00
Vintage King
5.0 (2)
$192.30

Average Price: $185

Standard/Professional

$70

$251+

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Price History

Based on price data from 6 merchants for "Electro-Harmonix Q-Tron + Envelope Filter". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Step into a world of sonic exploration with the Electro-Harmonix Q-Tron + Envelope Filter, an effects pedal that deftly blends classic funk with modern versatility. A standout feature is its dedicated effects loop, which allows you to slot in your favorite effects between the preamp and filter sections without altering the envelope drive. This opens up a plethora of opportunities to craft unique soundscapes, letting your creativity truly shine.

Whether you're aiming for a quick, biting attack or a more laid-back, smooth vocal-like tone, the Q-Tron + has you covered with its versatile Attack Response switch. Choose between fast and slow responses to match your playing style. The selectable low-pass, band-pass, and high-pass filters, coupled with a Resonant Peak control, enable you to sculpt your sound from subtle nuances to dramatic sweeps.

Designed for both electric guitar and bass, this pedal is a must-have for any musician looking to inject some serious groove into their performances. With true bypass functionality, your signal remains pristine when the pedal is not engaged, ensuring that your core tone stays intact. Plug in, experiment, and let the Q-Tron + take your sound to new, funky heights.

Key Features:

  • Dedicated effects loop for flexible sound experimentation
  • Attack Response switch for fast or slow envelope settings
  • Selectable low-pass, band-pass, and high-pass filters
  • Resonant Peak control for adjusting the filter's intensity
  • Sweep direction switch for up or down filter sweeps
  • True bypass to maintain pure signal integrity
  • Includes a power adapter for easy setup and use

Product specs

Pedal Type Envelope Controlled Filter
Analog/Digital Analog
Inputs 1 x 1/4" (instrument), 1 x 1/4" (fx return)
Outputs 1 x 1/4" (main out), 1 x 1/4" (fx send)
True Bypass Yes
Bypass Switching Switchable to Effect Mode Bypass
Power Source 24V DC power suppy (included)
Height 2.4"
Width 6"
Depth 4.7"
Weight 1.25 lbs.

FAQs

What is the primary function of the Electro-Harmonix Q-Tron+ Envelope Filter?

The Electro-Harmonix Q-Tron+ Envelope Filter is designed to dynamically alter your guitar's tone based on your playing intensity, producing a wah-like effect without needing a pedal sweep. It's especially popular for funk and dynamic rhythm playing.

Does the Electro-Harmonix Q-Tron+ work well with bass guitars?

Yes, the Electro-Harmonix Q-Tron+ works well with bass guitars, allowing bassists to achieve a wide range of funky, dynamic tones that respond to playing intensity.

What kind of power supply does the Electro-Harmonix Q-Tron+ require?

The Electro-Harmonix Q-Tron+ requires a 24V DC power supply, which is included with the pedal.

Can the Electro-Harmonix Q-Tron+ be used in an effects loop?

Yes, the Electro-Harmonix Q-Tron+ features an effects loop, allowing you to integrate additional pedals and expand your tonal possibilities.

What controls are available on the Electro-Harmonix Q-Tron+ Envelope Filter?

The Electro-Harmonix Q-Tron+ features controls for Mode, Response, Range, Peak, Gain, and Boost, along with a Sweep switch, allowing for extensive tonal shaping and customization.

EHX

EHX

Electro-Harmonix Q-Tron Plus Envelope Filter with Effects Loop (EHX Pedal Demo by Dave Weiner)

Video thumbnail for Electro-Harmonix Q-Tron Plus Envelope Filter with Effects Loop (EHX Pedal Demo by Dave Weiner) by EHX

Electro-Harmonix Q-Tron Plus Envelope Filter with Effects Loop (EHX Pedal Demo by Dave Weiner)

EHX

EHX

Video thumbnail for Electro-Harmonix Q-Tron Plus Envelope Filter With Effects Loop (Demo by Dan Miller) by EHX

Electro-Harmonix Q-Tron Plus Envelope Filter With Effects Loop (Demo by Dan Miller)

EHX

EHX

Reviews

PROS

  • Versatile with multiple modes: LP, BP, HP for varied tonal possibilities

  • Built-in boost mimics classic Garcia tones without additional gear

  • Excellent touch dynamics and sensitivity for precise tonal control

  • FX send/return loop enhances tone when used with other effects

  • Compact and sturdy design suitable for gigging

  • Easy to dial in desired sound quickly

  • Ideal for funk, R&B, and Grateful Dead-inspired sounds

  • Enhances non-filtered synths, adding funk without needing a talk box

CONS

  • Requires specific 24V, 2.5mm power supply not common in standard setups

  • Lack of volume control can affect gain settings with guitar volume adjustments

  • Overload issues at varying input levels without careful pedalboard placement

  • Some users report reliability issues after extended use

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Electro-Harmonix Q-Tron + Envelope Filter.

Features and functionality

  • Many owners find it challenging to dial in a favorable tone, often needing to crank the gain or use the boost for a proper quack effect.

    Source
  • The Q-Tron Nano offers distinct "round/rubber" tones, which are sought after for their unique sound profile compared to other envelope filters.

    Source
  • The Q-Tron provides dedicated High Pass, Band Pass, and Low Pass filter options, enabling precise tonal shaping, unlike the EQD’s full sweep Filter pot.

    Source

Setup and maintenance

  • The Q-Tron+'s switches have tiny pins that may misalign, causing functionality issues, suggesting a potential weak point in reliability.

    Source

Comparisons

  • Owners who transitioned from the Q-Tron+ to the Digitech Bass Synth Wah found it offers a wider range of filter sounds and ease of use.

    Source
  • The EQD Spatial Delivery includes a Random Sample and Hold feature, absent in the Q-Tron, offering unique modulation capabilities for enthusiasts.

    Source
  • The Keeley Neutrino is suggested as a middle ground between the Q-Tron and EQD, balancing price and features for those undecided between the two.

    Source

Use cases and applications

  • The pedal is noted for creating specific sounds like the Les Claypool filter, yet requires significant adjustments to the base tone for optimal use.

    Source

Mods and upgrades

  • Some users suggest pairing the Q-Tron+ with an EQ pedal to achieve better note registration without increasing drive, enhancing its tonal versatility.

    Source

User experience

  • The absence of a master volume on the Q-Tron+ is mentioned as a limitation, prompting users to adjust guitar volume knobs to control overall output.

    Source

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Artist usage

Add artist
See how Bootsy Collins uses Electro-Harmonix Q-Tron + Envelope Filter

Bootsy Collins

Singer, Bassist

Funkadelic

...
Verified via YouTube

In the YouTube video titled "Bootsy Collins Tours His Incredible Home Studio 'The Boot Cave'" by Reverb, at the 2:23 mark, an Electro-Harmonix Q-Tron+ Envelope Filter pedal can be seen in Bootsy Collins's studio setup, positioned at the top right corner of the screen.

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Used With

Based on how musicians on Equipboard use Electro-Harmonix Q-Tron + Envelope Filter, it is most commonly used with the following gear.

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