Two narrow filters sweep your tones under control of the envelope, generating very unique vocal-like sounds. For bass and guitar.
Two separate filter sections can be used in serial or parallel with different tonal sweeps, which react individually or interactively. Phase control allows for further contouring.

EHX has grafted technology found in keyboard and modular synthesizers into a pedal designed for guitarists and bass players. The Blurst modulates an instrument’s sound like an envelope filter, but instead of the filter’s response being controlled by playing dynamics, it’s controlled by an internal oscillator. The Blurst is a must have for the adventurous player who wants to explore new sonic territory!

Guitar gods have used the cocked wah sound to create monster riffs that have earned a permanent place in the rock lexicon. That required finding the sweet spot in their wah pedal’s sweep. The Cock Fight lets you achieve that cool cocked wah sound without the wah pedal.

Generates percussive punchy filter sweeps for a rhythmic groove and super-funky wah-like tones.
The Electro-Harmonix Enigma is a powerful and precise envelope filter fine-tuned for bass frequency response.
A smooth envelope filter with a funky wah-wah tone.
Stretch your musical boundaries!
Same design as the original Q-Tron but with extremely useful Effects Loop and an Attack Response Switch.
The Electro-Harmonix Riddle is a powerful and precise envelope filter fine-tuned for guitar frequency response.
The programmable Stereo Talking Machine, Vocal Formant Filter, presents creative vowel shaping that is controlled by the player's dynamics.
All-analog multi-effects processor featuring Phaser, Tremolo, Vibrato, and a Neo-modulated Wah.
Electro-Harmonix has been a modern leader in the classic envelope filter effect ever since the day the creator of the Mu-Tron and the creator of the Bassballs teamed up to produce the Q-Tron, now itself a classic, must-have effect pedal.

Known for their vowel-like liquid quality, envelope filters are devices that sweep the peak frequency of a filter by analyzing the amplitude of the notes the musician plays. The loudness and softness of the musician's playing alone controls the filter. It is an effect that is effortless for just about every guitarist.

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