Controls
- 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?
Information
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.
Video
(2011-11-27) BassFuzz.Com Presents: EHX Zipper Overview by bassfuzzcom
Documentation
- schematics
- schematics (Free Info Society)
- schematics available at Schematic Heaven
EH-4200 electroharmonix ehx eh electro-harmonics electroharmonics
