EarthQuaker Devices Sunn O))) HalfLife Octave Distortion Pedal

The EarthQuaker Devices Sunn O))) HalfLife combines a versatile distortion, blendable analogue octave, and a clean booster into one compact, professional-grade pedal. Renowned for its authentic tone, the HalfLife faithfully replicates the classic “White Face” distortion unit with enhanced clipping options for superior tonal adaptability.

Main Features

• Authentic Distortion Circuit
  Modeled after the classic “White Face” unit, the distortion section offers three distinct clipping modes:

  • No diodes for an uncompressed, intense op amp drive at full volume
  • Asymmetrical clipping using two silicon diodes and one LED, delivering a smooth, valve-like crunch
  • Traditional double silicon diode clipping providing the classic tight, compressed grind

• Blendable Analogue Octave
  The octave effect uses an all-discrete analogue full-wave rectifier circuit at the input, which gradually blends in as you increase the control clockwise. Best suited for single notes above the twelfth fret with the neck pickup, this monophonic octave can be controlled via expression pedal for dramatic, hands-free swells. Full engagement transforms the pedal into a soaring fuzz reminiscent of the legendary Super Fuzz.

• Clean, High-Gain Booster
  Featuring a 100% clean, all-discrete MOSFET circuit, the booster (called “Magnitude”) provides a high-impedance gain without adding colour or distortion, designed to push your amplifier tubes into rich, natural saturation.

• Flexible Signal Path
  The signal flows in the order: Octave > Distortion > Booster, but each effect can be activated independently with dedicated footswitches—right footswitch for octave distortion, left for the booster—allowing tailored control over your sound.

Specifications

• Clipping modes: None, LED + diodes (asymmetrical), double silicon diodes
• Octave type: Analogue full-wave rectifier, monophonic
• Booster type: MOSFET, clean gain, high input impedance
• Controls: Amplitude (distortion), Octave blend, Magnitude (booster)
• Footswitches: Independent octave/distortion and booster activation
• Ideal use: Single-note lead playing, octave swells, dynamic boosting, and classic distortion tones

Experience the unique fusion of vintage tone, modern versatility, and intuitive control with the EarthQuaker Devices Sunn O))) HalfLife—an essential tool for guitarists seeking a luxurious and expressive distortion setup.