Authorized Dealer
Ashdown Geezer Butler HOD-600 600-Watt Bass Head - Open Box
Geezer Butler Signature 600-Watt Bass Head
- Open Box -
Description
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/Specs
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
We are authorized dealers for all these brands. Click a logo to see our listings.
ProAudioStar is also not responsible for any taxes, local duties, or fees outside of the USA and those are not included in the sale price or ship charge.
If an item is refused by the buyer, ship costs to and from the destination in which the item was shipped to are not refunded. Please note the cost of return shipping is usually double of what the original ship cost.
Shipping is not free to HI, AK, and PR. FREE SHIPPING ONLY TO THE LOWER 48 STATES.
We provide free shipping to the contiguous 48 United States, on most items.
Shipping fees to ALL OTHER LOCATIONS will be calculated individually and added to customer invoices. ProAudioStar is also not responsible for any taxes, local duties, or fees outside of the USA and those are not included in the sale price or ship charge. In the event that the customer refuses a shipment, all shipping costs to and from the country or State in which the item was shipped to are not refunded. Please note, in some cases return shipping can cost as much as double the original ship cost.
We operate a 30-day return period. Items must be returned with all original packaging as well as all included items. Items that are not returned in original, resalable condition are subject to a 15% restocking fee. We charge a 15% restocking fee on returned items only if the item is clearly used and or the packaging is tarnished. A 10% re-stock is more likely if the unit comes back in mint condition. The ship cost we paid to ship your item will be deducted as well. In some cases restock fees and ship costs can be applied as a store credit.
We will exchange a defective unit for the same unit within the 30-day period. After that period, you will have to work directly with the manufacturer for warranty service.
Items that can not be returned include: software, units with contents or packaging that is damaged/missing, and items that are considered for personal use (such as earphones, headphones, microphones, instrument mouthpieces, harmonicas or other items that you wouldn't want to purchase if someone else had previously used them). Also, Items which we do not normally stock (i.e. "Special Orders", discontinued products, close-outs, used products, etc.) are non-returnable. We strongly suggest that you check your order after receiving it to be sure that it is in proper working order.
Please contact us for a Return Authorization before returning any items.