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Electro Harmonix Doctor Q Envelope Follower

Marsoni M251S
Sale price$149.50
Pay 4 payments of $37.38 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Electro Harmonix Doctor Q Envelope FollowerLate '70s envelope controlled filter featuring range control and bass guitar toggle knob. Made in the USA. Adds quacky, auto wah style movement to guitar or bass, reacting to your playing dynamics rather than an LFO. Simple Range and Bass Toggle controls let you dial in everything from tight rhythmic funk snaps to looser vowel like sweeps. A long running part of the EHX lineup, its been a go to for players chasing classic 70s filter textures, like
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.4 ★★★★★
Based on 2089 reviews
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Verified Purchase
Amazon Customer
Whiting, US
★★★★★ 5
Very practical for the price.
Color: Black
Very practical for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
J
Jeni & Mark
West Palm Beach, US
★★★★★ 4
Good for a quick backdrop
This works well for what I needed – a simple background for my kids’ online school. It’s lightweight and very easy to put together, and it stands up fine without needing to mount anything. The color is listed as black, but it’s more of a dark gray in person. Not a huge deal, just something to be aware of. It’s not super heavy duty, but it does the job for privacy and as a video backdrop. Overall, a good, portable divider that’s quick to set up and works well for light use.
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Reviewed in the United States on February 21, 2026
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Verified Purchase
Robert A. Bertsche
Draper, US
★★★★★ 5
Essay to assemble
Color: Grey
Very nice. Did the job the way I wanted.
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Reviewed in the United States on April 28, 2026
K
Verified Purchase
Kevin
Charlottesville, US
★★★★★ 2
Low budget option
Color: Grey
Budget low quality if thats what youre looking for
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Reviewed in the United States on April 27, 2026
K
Verified Purchase
Kelly W.
Dallas, US
★★★★★ 3
Hard to assemble
Color: Grey
This is extremely hard to put together, but once its together it is pretty good. You will need to secure it to something. It falls over.
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Reviewed in the United States on March 6, 2026

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