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GAMMA Cumulus 3-Way Reverb Effects Pedal

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A reverb pedal that offers three classic flavors.

The GAMMA Series Cumulus 3-Way Reverb from Acoustic Control Corporation allows you to add inspiring ambience to your guitar sound palette, with a choice of three classic flavors of reverb with Mix, Tone and Decay controls. In Studio setting, it emulates a crafted recording studio space, with a well-controlled decay that avoids muddying up your sound. In Spring setting, it emulates the splash and bounce of the spring reverb hardware of vintage guitar amps. The Plate setting emulates the sound of a classic studio plate reverb, for smooth, mellow ambience. The Cumulus 3-Way Reverb features a road-ready, classic, full-sized metal chassis with metal knobs, and operates from either a 9-volt battery, or 9-volt DC power supply. Batteries and DC power supply not included.

Carefully Crafted for Great Sound

GAMMA’s crafted blend of carefully selected components and expertly engineered circuitry is the key to this pedal’s dynamic, versatile sound and trouble-free operation. Transparent buffered bypass ensures trouble-free and consistent operation in any setup, while maintaining the clarity and integrity of your guitar’s signal.

GAMMA Series: Collect 'Em All!

The GAMMA pedal series offers a choice of reverb, echo, chorus, and a range of dynamic and versatile distortions. Every model follows the same approach of high-quality construction, metal flake paint finishes, and classically simple operation, to deliver essential effects sound for electric guitarists.


  • Three classic reverb sounds: Studio, Spring, Plate
  • Mix, Tone and Decay controls for sound-sculpting precision
  • All-metal chassis and knobs and a road-ready design
  • Operates from a 9V battery or 9V DC adapter (battery and DC supply not included)
  • Mono audio input and output, with buffered bypass for consistent tone in any setup

Order the GAMMA Cumulus 3-way reverb effects pedal today.


Cumulus 3-Way Reverb Effects Pedal Specifications:

  • Power Input Compatibility: 9V DC (Center Negative) 
  • Power Draw: 130mA 
  • Battery Compatibility: 9V (Alkaline recommended) 
  • Battery Life: 4-hours runtime 
  • Input: 1/4" Instrument Level Input 
  • Input Impedance: 650 kohms 
  • Output: 1/4" Instrument Level Output 
  • Output Impedance: 1 kohms 
  • Product Dimensions (DxWxH): 4.59" x 2.75" x 2.19" 
  • Product Weight: .55 lb. (8.8 oz.)

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WARNING: This product can expose you to chemicals including Acrylamide, which is known to the State of California to cause cancer, and to cause birth defects or other reproductive harm. For more information go to
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