Ashdown Geezer Butler Pedal of Doom
The Ashdown Geezer Butler Pedal of Doom is a bass-oriented distortion pedal developed with Geezer Butler, built around an active 5-band EQ, switchable drive and a transformer-isolated DI output. Guitar World's reviewer gave it 4 out of 5, praising the tone and build but criticizing the control layout.
- 9-18V DC · center −
- PedalBro score
- 70 / 100 · 1 source type
- New
- from $299
- Used (asking)
- No listings yet
The rundown
What it is
The Pedal of Doom is a distortion pedal from Ashdown, made with Geezer Butler and aimed at bass. It combines an active 5-band EQ, a switchable drive and two EQ settings that can be switched between, with two VU meters to show signal level. A transformer-isolated DI output is also included.
What it sounds like
Guitar World's reviewer described the tones as warm and characterful with a vintage flavor, and said there is plenty of room to shape them with the EQ. The same review also mentioned fuzz sounds that it called apocalyptic for players who want them, and noted that running the pedal at 18V gives extra headroom. Ashdown's own notes say it covers everything from light grit to full doom-laden distortion.
Skip it if
Skip it if you want a compact, easy-to-operate layout, since Guitar World's reviewer found the arrangement of controls and footswitches very impractical. The reviewer also thought a shared Bass control would have been more useful than the shared Treble. At 1200 g and 180 x 60 x 120 mm, it is also not a small pedalboard addition.
Where it goes in your chain
As a distortion with a built-in EQ and DI output, it would normally sit in the drive section of a bass signal chain, with the DI feeding a mixer or recording interface. The sources do not give more specific placement advice.
Highlights
- Active 5-band EQ with two switchable tone settings
- Switchable drive plus dual VU meters for monitoring signal level
- Transformer-isolated DI output
- Runs on 9-18V DC, center-negative; the higher voltage gives more headroom according to Guitar World
- Heavy, sturdy enclosure at 180 x 60 x 120 mm and 1200 g
Best for
Bassists who want a distortion with extensive EQ control, a DI output and the ability to switch between two distinct tones on stage or in the studio.
Reviews
Retailer ratings and editor verdicts, rolled into one 0–100 score. Thin data gets pulled toward the average, so one hype review can't carry a pedal.
- Editorial70Guitar World
Professional reviews
What the press rated it. We link to each review; read the full piece for the details.
- Guitar World4 / 5Jan 2026Read the review
Quick facts
- Power
- 9-18V DC
- Polarity
- Center negative
- Dimensions
- 180 × 60 × 120 mm
- Weight
- 1200 g
- Controls
- DOOM, DOOM Volume, Bass, Lo Mid, Hi Mid, Treble
Where to buy Ashdown Geezer Butler Pedal of Doom
| Listing | Seller | Price | Link |
|---|---|---|---|
| Best new price | Reverb · New | $299 | View |
| Best used price | No used listings right now | ||
| Amazon | Amazon · Search | See listings | Search Amazon |
| eBay | eBay · Search | See listings | Search eBay |
Prices last checked 1 hours ago. Links to sellers are affiliate links. As an Amazon Associate PedalBro earns from qualifying purchases.
Frequently asked questions
What power does the Pedal of Doom need?
The Ashdown Geezer Butler Pedal of Doom runs on a 9-18V DC supply with a center-negative plug.
What controls does the Pedal of Doom have?
The Ashdown Geezer Butler Pedal of Doom has DOOM, DOOM Volume, Bass, Lo Mid, Hi Mid and Treble controls.
How big and heavy is the Pedal of Doom?
The Ashdown Geezer Butler Pedal of Doom measures 180 x 60 x 120 mm and weighs 1200 g.
Does the Pedal of Doom have a DI output?
Yes, the Ashdown Geezer Butler Pedal of Doom includes a transformer-isolated DI output.