EarthQuaker Devices Sunn O))) Half Life
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The Sunn O))) x EarthQuaker Devices HalfLife distils the acclaimed Life Pedal circuit into its most compact and pedalboard-friendly format yet. Combining distortion, analogue octave-up, and independent boost functions in a streamlined enclosure, HalfLife retains the aggressive character and flexibility that made its larger predecessors cult favourites among players chasing massive walls of gain.
The signal path runs:
Octave → Distortion → Boost
with the octave/distortion section and booster each controlled by their own dedicated footswitch, allowing them to be used independently or together.
Amplitude Distortion CircuitThe distortion section is based on the classic "White Face" distortion circuit, reworked with multiple clipping options to suit a wider variety of amplifiers, guitars, and playing styles.
Three clipping modes are available:
No Diodes- Maximum output
- Minimal compression
- Raw op-amp saturation
- Aggressive attack and volume
- Two silicon diodes and one LED
- Smoother response
- Increased harmonic complexity
- Amplifier-like compression characteristics
- Traditional dual silicon diode configuration
- Familiar compressed distortion character
- Based on the original circuit design
The octave section uses a fully analogue, discrete full-wave rectifier circuit positioned at the front of the signal chain.
The Octave control gradually blends the effect into the signal, allowing everything from subtle harmonic enhancement through to heavily saturated octave fuzz textures.
An expression pedal input allows real-time control of the octave blend for dynamic performance applications.
As with most analogue octave-up circuits: - Single notes produce the strongest octave effect - Higher-register playing delivers the most pronounced results - Chords create complex and chaotic harmonic textures
At higher settings, the octave circuit transforms the pedal into a dense, fuzz-like sound reminiscent of classic octave fuzz designs.
Independent BoostThe onboard boost section sits after the distortion and octave stages and can be activated independently via its own footswitch.
This allows: - Volume boosts for solos - Additional amplifier drive - Greater saturation when pushing the front end of an amp - Flexible gain staging without additional pedals
Features- Sunn O))) x EarthQuaker Devices collaboration
- Compact version of the Life Pedal circuit
- Distortion, octave-up, and boost in one pedal
- Based on the classic "White Face" distortion circuit
- Three selectable clipping modes
- Fully analogue octave-up effect
- Discrete full-wave rectifier octave circuit
- Expression control for octave blend
- Independent boost footswitch
- Independent octave/distortion footswitch
- Signal path: Octave → Distortion → Boost
- Designed and manufactured by EarthQuaker Devices in Akron, Ohio
- Amplitude
- Tone
- Filter
- Octave
- Boost
- Clipping Mode Switch
- Octave/Distortion On-Off
- Boost On-Off
- High-gain amplifier setups
- Octave fuzz textures
- Heavy distortion sounds
- Dynamic gain staging
- Experimental and extreme guitar tones
Found Sound Australia Pty Ltd.
110 Albert St
Brunswick East, VIC 3057
Australia
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