The Ashdown 'Head of Doom' Geezer Butler Signature Bass Amp Head is a powerhouse designed in collaboration with the legendary bassist of Black Sabbath. Handcrafted in the UK Custom Shop, this amp head delivers classic, driven bass tones built on the foundation of Ashdown's flagship ABM series, ensuring unmatched reliability and performance. Its 9-band EQ with Bass, Middle, Treble controls, and six sliders offers precision tone shaping, while the Sub-Harmonic generator adds a deep octave below your played notes for unparalleled fullness. With 600 Watts of power and dual instrument inputs, the Head of Doom is ideal for both passive and active basses.

A standout feature of the Head of Doom is its twin VU meters, the first for an Ashdown amplifier, offering visual output monitoring and enhancing your stage presence. The amp includes a host of connectivity options, including tuner output, line out, FX loop, and dual Neutrik speakon outputs for flexible cabinet pairing. The control takes your tone to new levels with adjustable harmonic distortion via a 12AX7 pre-amp valve, all of which can be controlled via a footswitch. With powerful sound-shaping capabilities and Geezer Butler's signature tone, the Head of Doom is built for serious bassists looking to dominate the stage.

Specifications:

• Power Output: 600 Watts.
• Power Requirement: 115-230 Volts..
• Speaker Outputs: 2 x Jack/Speakon outputs.
• Frequency Response: -3dB @ 17Hz und 30KHz.
• High Instrument Input: Impedance 3.9m Ohms, input range 150mV.
• Low Instrument Input: Impedance 10k Ohms, input range 300mV - 40V.
• Line Input: Impedance 22k Ohms, input level 0dBu nominal.
• DI Output: 600 Ohm balanced, Level 0dBu nominal.
• Tuner Output: Impedance 22k Ohms, Level 0dBu nominal.
• Impedance: Minimum 4 Ohms.
• Effects Send: Impedance 22k Ohm, Level 0dBu nominal.
• Effects Return: Impedance 22k Ohms, Input Level 0dBu.
• Nominal Output Tubes: 1 x 12.