Pricing and availability

We compare 600+ stores and found this item at 8 stores. Prices updated .

Sweetwater
4.5 (10)
$192.30
Guitar Center
4.0 (7)
$192.30
Reverb
5.0 (50)
$165.56 New
$120.00 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: $178

Standard/Professional

$70

$251+

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Price History

Based on price data from 6 merchants for "Electro-Harmonix Q-Tron Plus (Vintage)". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Elevate your sound and take your music to unexplored heights with the Electro-Harmonix Q-Tron Plus (Vintage), a must-have for any guitarist looking to add a dynamic edge to their setup. Designed by the legendary Mike Beigel, this envelope filter pedal is a refined iteration of the classic Q-Tron, offering enhanced versatility with its unique effects loop and Attack Response Switch. The effects loop allows you to integrate your favorite pedals between the preamp and filter sections, giving you the freedom to craft entirely new sonic landscapes without altering the envelope drive.

The Q-Tron Plus doesn't stop there. It's equipped with a variety of controls including Mode, Response, Range, Peak, Gain, and Boost, granting you precise control over your sound. Whether you're after a fast, biting response or a smooth, vowel-like attack, the selectable low pass, band pass, and high pass filters have got you covered. With its dedicated effects loop, the Q-Tron Plus invites you to unleash your creativity by chaining effects in novel ways, making it an indispensable tool for any musician wanting to push boundaries and explore new musical territory.

Key Features:

  • Designed by Mike Beigel, inventor of the legendary Mu-Tron III
  • Dedicated effects loop allows placement of effects between preamp and filter
  • Response switch for fast or slow attack
  • Selectable low pass, band pass, and high pass filters
  • Resonant peak control for adjusting filter’s Q
  • Sweep direction switch for upward or downward filter sweeps
  • Adjustable gain knob and boost switch
  • LED indicators for effect engagement and signal overload
  • Includes 24DC-100 power supply

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 does the effects loop on the Electro-Harmonix Q-Tron Plus do?

The effects loop allows you to insert additional effects between the Q-Tron Plus's preamp and filter section without affecting the envelope drive, which is especially useful with distortion pedals.

Is the Electro-Harmonix Q-Tron Plus suitable for bass guitar?

Yes, the Electro-Harmonix Q-Tron Plus works well with bass guitars, providing dynamic filter effects that can enhance the instrument's tonal range.

What power supply is required for the Electro-Harmonix Q-Tron Plus?

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

Does the Electro-Harmonix Q-Tron Plus have true bypass?

Yes, the Electro-Harmonix Q-Tron Plus features true bypass, ensuring your signal remains unaffected when the pedal is not engaged.

What type of filter is the Electro-Harmonix Q-Tron Plus?

The Electro-Harmonix Q-Tron Plus is an envelope-controlled filter, which dynamically responds to the input signal's amplitude to create unique filtering effects.

ehpedals

ehpedals

Q-Tron Plus - Demo by Dave Weiner - Envelope Filter with Effects Loop - Electro Harmonix

Video thumbnail for Q-Tron Plus - Demo by Dave Weiner - Envelope Filter with Effects Loop - Electro Harmonix by ehpedals

Q-Tron Plus - Demo by Dave Weiner - Envelope Filter with Effects Loop - Electro Harmonix

ehpedals

ehpedals

Video thumbnail for Electro-Harmonix Q-Tron Plus Envelope Filter Complete Demo/Test Pedal | John Mayer Guitar Pedals 🎸 by Alberto Martinez Del Rio Guitar

Electro-Harmonix Q-Tron Plus Envelope Filter Complete Demo/Test Pedal | John Mayer Guitar Pedals 🎸

Alberto Martinez Del Rio Guitar

Alberto Martinez Del Rio Guitar

Video thumbnail for Electro Harmonix - Qtron+ (Vintage) Envelope filter + FX Loop -  test by Juan Miguel Perez - Clases de bajo on line

Electro Harmonix - Qtron+ (Vintage) Envelope filter + FX Loop - test

Juan Miguel Perez - Clases de bajo on line

Juan Miguel Perez - Clases de bajo on line

Reviews

PROS

  • Offers a wide range of vintage and modern funk tones

  • Mix mode allows blending of clean and effect signals

  • Instant tracking with no delay for responsive play

  • Effects loop offers versatile tone shaping options

  • Built-in boost replicates classic Jerry Garcia tones

  • Excellent for single pedal chain setups

  • Highly adjustable with multiple sweep and mode options

  • Compact size compared to original Q-tron models

  • Great for both guitar and bass applications

  • Known for sturdy build quality and durable design

CONS

  • Makes a loud popping noise when switching on/off

  • Colours tone when used with other pedals in the chain

  • Requires 24V power supply, which may need adapters

  • Volume boost can be hard to manage without extra equipment

  • May lack versatility for users seeking multiple effects in one pedal

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Electro-Harmonix Q-Tron Plus (Vintage).

Features and functionality

  • The Q-Tron Plus excels for bass players using gain stages, providing a unique setup order for optimal tone.

    Source
  • The older big box design was phased out around 2006-2007, with the XO version replacing it.

    Source
  • The 1997 reissue of the Q-Tron Plus contains five JRC4558D chips, the same type found in the TS-808 Tube Screamer, contributing to its distinct sound.

    Source
  • The older Q-Tron Plus model includes a valuable effects loop that allows integration of additional pedals like phasers or dirt pedals.

    Source

Use cases and applications

  • Bass players often use a specific chain: tuner -> Q-Tron -> send -> gain -> true bypass loop -> Q-Tron return -> Q-Tron out -> modulation.

    Source
  • The Q-Tron Plus effectively captures the signature sound for songs like "Shakedown Street" and "Fire on the Mountain," particularly favored by those seeking a Jerry Garcia-like tone.

    Source

Other

  • It's noted that the Q-Tron Plus is favored among players for its compatibility with gain stages, particularly in bass setups.

    Source

Mods and upgrades

  • Analogman offers a Mix knob mod for the Q-Tron Plus that costs about $65 plus shipping, enhancing the pedal's versatility.

    Source
  • The "r32 Jerry mod" and master volume mod are popular upgrades for improving the vintage Q-Tron Plus sound.

    Source

Build quality

  • Some vintage Q-Tron models are marked "Made in New York City," while others say "Made in NYC," indicating slight variations in production.

    Source

Value and pricing

  • Vintage Q-Tron Plus pedals have seen a significant price increase, with some listings reaching up to $375, reflecting their growing rarity and demand.

    Source

Comparisons

  • The Mu-Tron Microtron IV is frequently recommended over the Q-Tron for achieving a more authentic Jerry Garcia tone.

    Source

User experience

  • Owners report that the older big box Q-Tron Plus takes up significant space on a pedalboard, which may not be ideal for gigging setups.

    Source

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Artist usage

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See how Felipe Ilabaca uses Electro-Harmonix Q-Tron Plus (Vintage)

Felipe Ilabaca

Singer, Bassist

Chancho en Piedra

...
Verified via Photo

Felipe utiliza éste pedal desde el 2018, se puede ver en la imagen y en distintos videos de sus presentaciones.

See how Joe Lester uses Electro-Harmonix Q-Tron Plus (Vintage)

Joe Lester

Keyboardist

Silversun Pickups

...
Verified via YouTube

At 2:48 in the video it appears Joe is using an EHX Q-Tron

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 Plus (Vintage), it is most commonly used with the following gear.

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