Mojo Hand FX Wonder Filter — Analog Envelope Filter + Boost — HP/BP/LP Modes — True Bypass
Classic auto-wah / envelope-filter sweeps with real control—tight funk “quack,” chewy synthy vowel tones, and everything in between, plus a built-in boost for pushing an amp or front end. The Wonder Filter is the kind of pedal you can set subtle for always-on movement, or crank into full-on laser-filter territory for bass lines, leads, and rhythmic chops. With selectable filter modes (HP/BP/LP), range and drive voicings, and separate mix/peak controls, it’s flexible enough to dial in fast without feeling “fiddly.”
Condition:
Great overall condition and fully functional. Cosmetic wear is consistent with normal pedalboard use—light scuffs/marks on the enclosure and hardware, nothing that affects operation. Hook-and-loop (Velcro) is installed on the bottom for board mounting (see photos).
Includes:
Mojo Hand FX Wonder Filter pedal
Not included: box, manual, or power adapter.
Key Features & Controls:
Analog envelope filter / auto-wah style sweep that reacts to your picking dynamics
Filter Mode selector: HP / BP / LP (plus an additional position on the selector for a different/alternate response)
Mix control for blending filtered signal with your dry tone (great for keeping lows intact on bass)
Peak control to set resonance (how “quacky” / vocal the sweep gets)
Gain / Attack controls for sensitivity and how the filter responds to your playing
Boost control for extra level/push when you want it
Range switch (L / H) to match different pickups and output levels
Drive switch for alternate voicing/feel
True bypass footswitch
Power: standard 9V DC pedal supply
Quick “Dial-In” Starting Points:
Funk / quack rhythm: BP mode, Range = H, Peak around noon–2, Mix around noon, Gain to taste
Bass envelope: LP mode, Mix 1–2 o’clock, Peak just under noon for rounder sweeps
Synthy vowel lead: HP mode, Peak 2–4 o’clock, Gain up, Attack adjusted for a sharper bite
Subtle always-on movement: lower Gain, moderate Mix, Peak just under noon
FAQs:
Q: Is this a wah pedal you rock with your foot?
A: No—this is an envelope filter (auto-wah). It reacts to how hard you pick.
Q: Will it work on bass?
A: Yes—especially with the Mix control (helps retain lows) and LP mode.
Q: Does it come with a power adapter?
A: No—pedal only.
Q: Where is it made?
A: Mojo Hand FX is a boutique U.S. builder, and these were typically hand-built in the USA.

