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Electro-Harmonix Q-Tron+ Envelope Filter Pedal

Envelope Follower Pedal with Effects Loop and Attack Response Switch
10 Write review Item ID: QTronPls
$192.30

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Electro-Harmonix Q-Tron+ Envelope Filter Pedal
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A Classic E-H Filter Pedal Gets Even Better!

The Electro-Harmonix Q-Tron+ envelope follower pedal takes a great design even further! In addition to the original Q-Tron's great features and sound, the Q-Tron+ gives you an effects loop that lets you put an additional effect between the Q-Tron+'s preamp and filter section without changing the envelope drive. An Attack Response switch has also been added, allowing you to choose between the classic fast response of the original Q-Tron and a slower, smoother attack. If you're looking for some ultra-cool, funky and active filtered tones, check out the Q-Tron+!

Related Videos: Q-Tron+ Envelope Filter Pedal

Electro-Harmonix Q-Tron+ Envelope Follower Pedal Features:
  • Effects loop
  • Attack Response switch
  • Fast or slow attack
The Electro-Harmonix Q-Tron+ makes a classic pedal even funkier!

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Tech 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.
  • Manufacturer Part Number: Q-Tron+

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Customer Reviews

4.7 out of 5

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The Master of Envelope Filters

What a great pedal. Funny, I was reading on some boards people saying there really is only one setting/sweet spot for all the dials to be in. Sure, if you want to sound like Jerry, well, you are going to have to set it to the most Jerry-like spot and keep it all right there! But I am finding so much other utility in addition to wanting to sound like Jerry. Setting the mode to to HP really opens up the tone and dials down the wah and I find it just super cool to use on an acoustic, just one example. Definitely use cases for slow and fast responses and different sweeps. I worry about over using it at a gig to now "always" have it be "the" sound...but there is enough flexibility there that I can play 5 or 6 songs with it and they all sound unique in their own way.

If I have a gripe with all Envelope Filters I have used, it is wishing there was a volume knob at the output...generally the QTron is pretty good at outputting at the right volume when the gain is set just right...but not always and in every application. For a player like me, I like to control volume with the guitar...but then that effects the gain of an Envelope Filter. I already have a wah and an expression pedal in my setup...I certainly dont want to add a volume pedal to the mix. But that is kind of what you get with all EFs...luckily in most cases the QTron does just fine.

And most importantly, it just...sounds...fantastic.
by David Dutwin from Chicago, IL on

Excellent! Estimated Prohet

I'm getting great Garcia and Mayer tones out of this box. Really cool!
I have tried the nano qtron its very good but not as good. The peak knob is really useful for dialing in tones.

It has a built in boost before the filter. This is cool because typically to get the Garcia like tone you have to clean boost before the filter. (Garcia had stratoblaster preamp in his guitar). I'm using a JHS prestige to mimic the stratoblaster but you don't really need it since it has a boost built in.

Nails the Grateful Dead - Estimated Prophet tone. its so fun!
by Sweetwater Customer on

Exactly what I wanted

I have used a few other envelope filters. I am not an envelope filter aficionado, but this is the one that does what I expect it to. The touch dynamics make sense. I never got more or less filter/quack from my playing that I want. It was very simple and quick to dial in exactly what I wanted. The mix is my favorite mode, blending your guitar signal with the BP. I also can't speak highly enough of the FX send/return. Putting a fuzz in that loop versus before or after the effect creates a vastly better tone. I'm happy to just stay with this one for my quacky, funky, whop-whop needs.
by Ryan from Texas on

Worth it

This is such a killer pedal. packs a punch and very adjustable. It gives off nice John Mayer tones and Jerry Garcia type wahs. Never been happier with this thing. It's not too big in terms of size and its built very sturdy.

In terms of tones and sounds this thing has a variety of options with two different sweep options, a boost stage and different modes. You can go from a low refined sweeping R&B type tone to an up-tempo funky grateful dead sound that will fill the room with clear notes.

One issue. This is a 24v pedal and the barrel is a 2.5mm as to a normal 2.1mm barrel like other pedals. Most power supplies will not have the power for it. So you have to get the voltage splitter if you want to plug it in with a power supply.
I have a strymon Zuma so I got the 24volt 2.5 mm barrel into 2 12 volt 2.1mm barrels so I can adapt the Qtron to the Zumas adjustable power sources
by Hiialo Copp on

Groovy funkadelic pedal

Love this pedal!! You can get all the Jerry Garcia tones and many more such as awesome funk tones!!! Built in effects loop is epic too. Can"t go wrong with this pedal.
by Bop from See on
Music background: Boop

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What Do Our In-house Gear Experts Think?

Ryan Murphy

Buy this to make your riffs funky!
See also: wahwah, Electro-Harmonix, Electro-Harmonix Wah & Filter Pedals
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