Electro-Harmonix Zipper - Envelope Follower


  • Range
    Sets the frequency range in which the filter moves.
  • LP/BP
    Switches between a lowpass filter or a bandpass filter
  • Attack (1/2)
  • Q
    Peak/Resonance control?


a 70's Electro-Harmonix brochure

The most flexibile controlled filter available offering the same rugged quality as the Doctor Q but on a more sophisticated level with greater flexibility and sweep. Additional controls allow for better fine tuning with maximum range of effects.

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EH-4200 electroharmonix ehx eh electro-harmonics electroharmonics envelope-controlled envelope follower amplitude controlled fx pedal stompbox stomp box guitar effects pedal filter eq/excite/filter bandpass bp bpf band-pass filter
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