Electro-Harmonix Q-Tron+ Envelope Filter Pedal

Envelope Follower Pedal with Effects Loop and Attack Response Switch
Electro-Harmonix Q-Tron+ Envelope Filter Pedal image 1
Electro-Harmonix Q-Tron+ Envelope Filter Pedal image 1
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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+!

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!

Additional Media

New in Stock at Sweetwater

Tech Specs

Pedal Type Filter
Inputs 1 x Instrument, 1 x 1/4"
Outputs 1 x 1/4", 1 x 1/4" (Effects Send)
Height 2.4"
Width 6"
Depth 4.7"
Weight 1.25 lbs.
Power Supply Included Yes
Manufacturer Part Number Q-Tron+

Customer Reviews

Based on 2 reviews
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Shakedown street sound

It's a amazing pedal to get that funky sound. I bought it for that cool Jerry Garcia Shakedown Street and Fire on the Mountain sound and I achieved it and got more cool sounds out of it. Highly recommended

Vintage 70's funk tone for bass

The Q-Tron maintains the low end real nice. It has 4 frequency settings but only 2 are usable for bass. It has more of a subtle wah tone. I had the Boss AW-3 Dynamic Wah for a long time. The Boss got annoying if you left it on too long, it also didn't hold the low end real well. The Q-Tron lets you tone down the "squawk" a little. It has a pleasant analog tone. My opinion is that auto-wah effects sounds better going through the amp than direct. But this pedal doesn't sound too bad direct. I live in an apartment so I have to practice with headphones. I put the Q-Tron before a Keeley compressor to manage squawk going through my headphones. Most of the envelope filters I heard online make your bass not sound like a bass anymore. But you really have to spend time playing with the settings to get a usable sound. Depending if the sweep is set up or down, you have to experiment with it for a while. I initially bought the standard Q-Tron (without the +.) I thought the only difference was that the Plus version had an FX loop. When I got it, I realized the standard version didn't have the Response setting. It was an easy exchange and I got the Plus version. The downside: It takes a 24-volt adapter so you can't hook it up to most pedal-power units that only supply 9, 12 or 18 volts. Also, I think it could of been downsized a little. Three of the knobs only have two positions you can set. So maybe they could have put left/right switches underneath the fully rotatable knobs. I had to cut the rubber feet off with a knife so it would mount properly onto the pedal board. Overall, it's not a bad pedal. Analog is the way to go on this effect.
Music background: Always learning

Sweetwater Advice

Ryan Murphy

Buy this to make your riffs funky!
See also: Wah Pedals, Electro-Harmonix, Electro-Harmonix Wahs and Filters