The Jeds Peds Auto Wah is a DIY guitar effects pedal kit that builds an auto wah envelope filter, the effect that listens to your picking dynamics and sweeps a filter in response. Jeds Peds pitches it plainly: "Slam dunk some funk with the Auto Wah," and describes its character as "The harder you play, the more it quacks and it really does quack."1
The circuit it comes from
Jeds Peds describes the kit as "based on Jack Ormans modified Dr Q Envelope Filter," and says the finished result "compares to the Dr Q Envelope Filter (with mods)."1 The Dr Q is an envelope filter design, the same family of circuit as the classic auto wah pedals covered on the Mu-Tron III page, which is itself an envelope filter, also called an autowah.2 If you would rather buy a finished filter pedal than build one, the site's filter pedal page gathers the type as a whole.
Controls and layout
The kit is deliberately simple: "This kit has one pot and one toggle switch for its control."1 The PCB is laid out for a board mounted pot and toggle, so those two parts solder directly to the board rather than hanging on wires.1
Kit versions
Jeds Peds sells the Auto Wah in five versions, from a bare board to a fully drilled build1:
| Version | What you get |
|---|---|
| PCB Only | Just the plain PCB1 |
| PCB & Components | PCB with parts, no enclosure work1 |
| PCB & Components and off board parts | Adds the off board parts1 |
| Full Kit | Everything for a build, undrilled enclosure1 |
| Full Kit & Drilling | Full Kit with the enclosure drilled1 |
Drilling is an optional extra for the Full Kit with a small surcharge, and it covers "all the holes for a complete pedal," so the enclosure arrives ready to mount everything.1
Pre-built option, price and warranty
If soldering is not for you, the Pre Built Kit is Jeds Peds' assembled version, listed at £30.00 as of 26 October 2026.1 Pre Built Kits have a 1 to 4 week build time, so allow that lead time when ordering.1 The maker's terms are specific: "There are no returns accepted on these but I do give a 12 month repair warranty so should a fault be developed I will re" [pair it], meaning faults inside a year are repaired rather than refunded.1
Questions
What circuit is the Jeds Peds Auto Wah based on?
Jeds Peds describes the Auto Wah as a kit based on Jack Orman's modified Dr Q Envelope Filter, and says the finished pedal compares to the Dr Q Envelope Filter with mods. The Dr Q is an envelope filter design, the same family of circuit as the auto wah pedals that listen to how hard you play and sweep a filter in response.
Does the Jeds Peds Auto Wah come pre-built?
Yes. Alongside the bare PCB and component versions, Jeds Peds offers a Pre Built Kit, priced at £30.00 as of 26 October 2026. Pre-built units carry a 12 month repair warranty, and the maker does not accept returns on them. A pre-built kit has a build time of 1 to 4 weeks before it ships.
What enclosure does the Jeds Peds Auto Wah use?
The kit is supplied with a JP125B enclosure. If you take the Full Kit, you can add drilling as an optional extra for a small surcharge, which gives you an enclosure with all the holes needed to finish a complete pedal.
What does the drilling option include?
Drilling is an optional extra for the Full Kit and carries a small surcharge. It covers all the holes for a complete pedal, so the enclosure arrives ready to take the pot, toggle switch, jacks and switch without you having to mark out and drill the metal yourself.
How long does a pre-built Jeds Peds kit take to make?
Jeds Peds lists a build time of 1 to 4 weeks for Pre Built Kits. That is the time before the finished pedal is ready, so order with that lead time in mind rather than expecting an off-the-shelf shipment.
Sources (2)
- Auto Wah, Jeds Peds (jedspeds.co.uk)
- VFE_SPS_MiniMu.pdf, madbeanpedals.com, 2024-04-25
