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.

Some wear throughout but all working well. Part of the plastic missing from the output knob, this is just cosmetic.

• Power Output: 600 Watts
• Power Requirement: 115–230 Volts
• Output Tubes: 1 × 12AX7
• 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
• Impedance: Minimum 4 Ohms