Introducing the Geezer Butler Signature "Pedal of Doom" by Ashdown Engineering—a powerhouse bass distortion pedal with dual switchable EQs and switchable drive. Designed to meet the sonic needs of legendary bassist Geezer Butler, this pedal offers unmatched control with its 4-band EQ and dual VU meters. Perfect for bass players looking to dominate with rich harmonics and versatile distortions.
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Ashdown Engineering proudly unveils the Geezer Butler Signature “Pedal of Doom,” a bass distortion pedal that has been finely crafted over 18 months of development. Inspired by Geezer Butler’s iconic tone, particularly from tracks like “Hand of Doom,” this pedal captures the essence of what has made his sound a cornerstone of heavy metal music.

At the heart of the Pedal of Doom lies an active 5-band EQ, allowing players to sculpt their sound with unparalleled precision. This feature, coupled with the ability to switch between two distinct EQ settings, provides the flexibility to toggle from a clean, punchy bass line to a distorted, doom-laden growl without losing clarity or power. The onboard transformer isolated DI output ensures that your tone remains consistent, whether in the studio or on stage.

Dual VU meters monitor the signal integrity, ensuring that the bass levels are balanced, eliminating unwanted gain jumps. The true versatility of the Pedal of Doom lies in its dual EQ system, allowing musicians to tailor their tone directly on the pedal, matching the output perfectly to their bass and amplifier.

This pedal is not just about powerful tones but also about offering the reliability and finesse required by professional musicians. It comes after extensive collaboration with Geezer Butler himself, who has stamped it with his personal approval, describing it as the best-engineered pedal he has ever used.


  • Model: Geezer Butler Pedal of Doom
  • Type: Bass Distortion Pedal
  • EQ: Active 5-band EQ (Bass, Low-Mid, Hi-Mid, Treble)
  • Features: Dual switchable EQs, switchable drive, transformer isolated DI output
  • VU Meters: Dual, ensuring balanced signal
  • Power Requirement: 9-18V external power supply, center pin negative
  • Dimensions: 60mm x 180mm x 120mm (H x W x D)
  • Weight: 1.2 kg

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