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Rent McCaffrey Audio Reactor Boost Compressor

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The Reactor Boost Compressor was truly born by the demands of the people! I was never a big compressor guy. I had numerous requests for various compressor builds over a three month period. I decided to see what all the fuss was about!!!


  • Neutrik Jacks
  • Power: Negative center 2.1mm standard 9V power supply.
  • Single dual op-amp effect with J-Fets and a single diode towards the end of the circuit.
  • Level: Increases/decreases output volume of pedal. Increase the level and notice how the pedal starts to push the front end of your amp and other pedals.
  • Fusion: Affects the amount of compression and drive when the level is increased.
  • Critical Mass Switch: Three-way switch that adds bass response to the effect. Middle is the stock or “jangle” position. Adds a bit O’ snap to pick’n. Left adds just a bit more bass response. Right adds the most bass response.
  • Mad Dog’s Favorite Setting: Put this in front of your slightly driven amp.

    Level to 5:00 or the max setting.
    Fusion to 10:00
    Critical Mass switch to the left position.

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