Tube Zipper Envelope Filter/Distortion

Unzip your soul! Just picture your guitar signal being massaged by a complex set of filters moving through a vacuum tube maze. Energized by two Electro-Harmonix 12AX7 tubes, the Tube Zipper's patented moving filter tastefully adds controlled analog harmonics to your signal. In typical EHX fashion, each control can be set over-the-edge, generating a host of novel tones. Tron or Trill a la mode!

"It's the most flexible little box yet." -- Adrian Belew


Featured Videos
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From the Blog
Posted 10/11/2012



JetCityMusic does a great demo of the EHX Tube Zipper Envelope Filter/Distortion.

Posted 6/20/2011



Devon at Gear Up funks up with the EHX Tube Zipper Envelope Filter/Distortion pedal.

Posted 5/3/2011



Brazilian rocker, Rodrigo Lanceloti, sent us this great piece of him wailing on the EHX Tube Zipper. Rodrigo, who’s a friend of Electro-Harmonix Founder and President, Mike Matthews, included some shots of Mike with funk legend, George Clinton!

Posted 6/27/2009
Gearwire recently published part 2 of interview with Jack Conte. In part one Jack talked about his Bass Micro Synthesizer, this time it's the Tube Zipper. You can listen to part 2 here:

Alternative content

The interview references Jack's "Out of Nowhere" -- which we copied below for convenience:

Posted 5/6/2009
Cheers to Jack Conte for "This Disaster," his latest 'videosong' -- I spotted a HOG, a Big Muff Pi, and a Tube Zipper (and for EHX shirts, check out the merch shop).

btw, Jack's videosong rules are: 1. What you see is what you hear (no lip-syncing for instruments or voice). 2. If you hear it, at some point you see it (no hidden sounds).

Posted 8/17/2003
George Clinton backstage with his Tube Zipper.

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Quick Specs
True bypass using a mechanical relay
Overdrive stage allows interaction with the envelope follower for hard hitting sweeps and frequency color
Tron mode allows the filter to sweep smoothly, following your amplitude's envelope
Trill mode allows modulation to be added to the envelope as the filter sweeps
Switchable up or down filter sweep directions
Input gain boosts the signal before the filter drive
Resonance control adjusts the Q or peak of the filter ranging up to self-oscillation
Two Electro-Harmonix 12AX7 vacuum tubes included
12VAC-1000 power supply included
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