(3 customer reviews)


The Walpurgis Iommic Overdrive / Preamp combines two legendary circuits into one unparalleled Black Sabbath Worship device.

Featuring an internal 36V of headroom for authentic tube-like tone and response, the Walpurgis is a JFET based emulation of the preamp section of a late ‘60s Laney Supergroup amplifier with the Worship Knob controlling the wet / dry blend of a modified Dallas Rangemaster boost.

Designed in collaboration with Nick Williams of Dunwich Amplification.

Availability: In stock



Harness Tony Iommi’s iconic guitar tones from the 60’s, 70’s, and beyond with the turn of a single knob.

The Walpurgis can be used as an overdrive pedal into the front end of your amplifier or turn up the internal master volume trim pot to boost the output and run it as a preamp into your effects return or dedicated power amp.

Worship Settings

  • Min: Unboosted first album era tone
  • 9 o’clock: Paranoid era tone
  • 12 o’clock: MOR / Vol 4 era tone
  • 3 o’clock: SBS / Sabotage era tone
  • Max: Hotter modern era tone


Worship: Controls the wet/dry blend of the Rangemaster Boost into the Laney Supergroup Preamp. Set it at minimum to remove the boost entirely.


Use only a standard 9v DC power supply with a 2.1mm negative-center barrel.  An isolated power supply is recommended.  Power supply not included.


  • One-knob Iommic Overdrive / Preamp for guitar and bass
  • Relay-based, true bypass soft switching
  • Adjustable master volume via internal trim pot (MAST)
  • Adjustable LED brightness via internal trim pot (LED BRIGHTNESS)
  • Premium components including Neutrik input/output jacks, Lumberg power jack, ORMAT knob, Alpha pot, sealed relay, metal LED bezel, and mil-spec aircraft grade wire
  • Chrome-like powder coated finish with clear coat and high gloss textured UV printed artwork
  • 4.75” x 2.625” x 2.375”
  • 8.8oz

3 reviews for WALPURGIS

  1. Dave Gadomski

    I’ve played through many Iommi inspired pedals that utilize the Laney Supergroup+Dallas Rangemaster combo with very mixed results until now. Having played through actual Laney Supergroup amps with numerous Rangemaster style clones none of those other pedals really came close, but this one just nails it!

  2. Cadaver Head

    I have been playing around with it and man! This pedal really does sound like Tony’s tone! Especially going directly in to my audio interface with that new Laney IR cab from Two-Notes with the power amp emulation enabled. It also sounds good going into the clean channel on my Orange CR120H as well. Been playing some Sabbath riffs and It inspired me to come up with some new riffs of my own. I love the tube like response a lot. I have tried other pedals like the Fuzzcoven, Hypercoven and Fuzzlord’s Drone Master in front of it with the worship settings set min and just love how it fuzzes! This pedal has been a blast so far!

  3. Tim (verified owner)

    10/10 My favorite pedal! I have been chasing Iommi’s tone for a very long time trying a multitude of different pedals that left me unsatisfied. This pedal absolutely crushes Sabbath tone and keeps it simple with a single knob. I highly recommend this to anyone that wants to take their tone to the next level!

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