Greathammer
Greathammer
The Electronic Audio Experiments Greathammer is a bass-focused overdrive that brings a distinct flavor of solid state thunder.
With a gain control spanning a 50dB range, the Greathammer can be restrained or rowdy. We took cues from a beloved 1970s Canadian bass amplifier, but we did not shy away from redesigning entire circuit blocks from scratch. Without taking away the classic piano-like attack that defined 90s noise rock, we expanded the tonal range to suit more tasteful playing or filthy, down-tuned mayhem. Critically, our circuit can achieve far deeper low frequency extension than its progenitors—all without the unnatural, disconnected feel of a traditional clean blend.
The Greathammer is equally effective in front of an amplifier or as a dedicated preamp. And, while we designed this with bass as a primary focus, it is quite striking on guitar as well.
Electrical Specifications
Bypass switching: Silent electronic switching with a high-headroom op amp buffer
Input impedance @ 1Khz: 1MΩ
Output impedance @ 1Khz: <1KΩ
Power: 9VDC, 2.1mm center negative barrel. The current draw is 70mA.
We recommend a regulated, isolated power supply rated for 100 mA minimum. The DC input is protected against reverse polarity and over-voltage up to 20V. Our pedals do not accept batteries.
All Greathammer pedals come with our standard warranty.
Controls
Level: overall volume level, capable of extremely high output
Gain: signal gain, from clean to moderate to extreme. Approximately 50dB maximum passband gain.
Bass: post-clipping low frequency shelf boost, up to +14db at 100Hz and below
Attack: pre-gain tone control, adjusts frequencies above 1kHz to tailors the overall drive response and sharpness of pick attack
Notch (toggle): 3-position mid cut. Center is a full mid cut, down is a moderate mid cut, and up is flat mids.
Footswitch: Activates the effect with intelligent momentary/latching behavior.
Changelog
Version 1
Original release, January 2026
Sound Clips
All clips recorded with an Ampeg V4 into a Greenboy Dually 2x15 cab with an Electrovoice RE20 approximately 2” off axis.
