Handcrafted in the UK Custom Shop for Black Sabbath’s Geezer Butler, the Head of Doom delivers 600 watts of signature Ashdown tone with crushing power and versatility. Built on the flagship ABM platform, it features a 9-band EQ, Sub-Harmonic generator, and the unique Doom control, driving the 12AX7 preamp stage for rich harmonic distortion.

With dual inputs for passive/active basses, twin illuminated VU meters, footswitchable EQ settings, and full pro connectivity - including DI, FX loop, line in/out, and dual Speakon outputs - it’s a powerhouse built to command the stage with authority and unmistakable style.

600 Watts of Pure Doom

Power to Shake the Earth

The Head of Doom boasts a 600-watt RMS power section designed for uncompromising low-end authority. With dual Neutrik Speakon outputs and a minimum load of 4 ohms, it’s built to handle anything from a single 8-ohm cabinet to a full wall of doom-inducing enclosures. A dedicated slave input allows for multiple heads to be linked together, multiplying your sonic power and cementing its name as the ultimate weapon for bassists who refuse to be ignored.

Unique Visual Feedback

Dual VU Monitoring

A defining feature of the Head of Doom is its twin VU meters - the first Ashdown head to showcase both input and output levels side by side. The input VU meter ensures you always hit the sweet spot for your bass, while the output VU keeps your stage levels under control. Backed by a powerful 9-band EQ and a Shape control, bassists can craft tones ranging from tight and punchy to dark and thunderous, all while keeping precise visual monitoring at their fingertips.

Built for Studio and Stage

Professional Connectivity

Connectivity is at the heart of the Head of Doom. It features a tuner out, DI out, transparent FX loop, and line input for integrating samplers or external sources. Output muting silences the DI while keeping the tuner out live, allowing for silent tuning on stage. A pair of Neutrik jack/Speakon sockets ensure flexible cabinet pairing, while three transformer-isolated outputs provide professional-grade options for recording or running multiple rigs.

Signature Harmonic Distortion

The Doom Control

The aptly named Doom control pushes extra current through the amp’s 12AX7 preamp valve, unlocking rich harmonic distortion tailored for bass. From subtle grit to full-blown growl, this feature transforms your tone into a force of nature. Best of all, the Doom control can be pre-set and toggled via footswitch, giving you on-demand access to crushing overdrive that retains low-end power and clarity.

A Signature Amp for a Bass Icon

Geezer Butler’s Legacy in Sound

Features

Power

• Power Output : 600 Watts
• Power Requirement : 115–230 Volts
• Output Tubes : 1 × 12AX7

Connectivity & I/O

• Speaker Outputs : 2 × Jack/Speakon outputs
• High Instrument Input : Impedance 3.9MΩ, input range 150mV
• Low Instrument Input : Impedance 10kΩ, input range 300mV – 40V p-p
• Line Input : Impedance 22kΩ, input level 0dBu nominal
• DI Output : 600Ω balanced, Level 0dBu nominal
• Tuner Output : Impedance 22kΩ, Level 0dBu nominal
• Effects Send : Impedance 22kΩ, Level 0dBu nominal
• Effects Return : Impedance 22kΩ, input level 0dBu nominal

Performance

• Frequency Response : –3dB @ 17Hz – 30kHz
• Impedance : Minimum 4 Ohms

Dimensions

• H × W × D (mm) : 434 × 280 × 140