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Hartman Electronics Envelope Filter

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Hartman Electronics Envelope Filter
News Hartman Electronics Envelope Filter

Wah-Wah/Auto Wah/Filter for Guitar from Hartman Electronics

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Inspired by an envelope filter pedals of the 1970's and developed with guitarist Mark Karan (Delaney Bramlett, Bob Weir & Ratdog, Jemimah Puddleduck) the Hartman Envelope Filter employs low-noise components and an optically controlled state-variable filter for timbre and response.


A second footswitch permits change of filter sweep direction for  access to a palette of classic filter sounds from funky chirps and saturated quacks to flute-like attacks and horn-tones. An active Mix control blends filtered and unfiltered signal. Factory preset internal trim pots permit additional tuning of filter voice and action.



• Sensitivity, Peak, and Mix controls.
• Hi-Lo Filter Peak Frequency Switch.
• Footswitch control of Filter Sweep Direction.
• Plated-Through-Hole PCB (printed circuit board) construction.
• Powder-coated metal enclosure with  true-bypass switching.
• 18VDC 2.5mm External power jack.
• 5–5/8”w x 4–5/8” x 2–1/2”
• Made in U.S.A. One-Year Warranty.

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