Reverb pedal which keeps the original signal path analog and pure, while giving you overdrive and regeneration controls to take you from spring reverb sounds to something much bigger. The controls are very interactive with each other, and as per Caroline tradition, this pedal can get VERY loud. Attack sets the amount of gain in the preamp, allowing you to boost or overdrive the reverb. Size establishes the initial reverberation. Regeneration extends the decay and adds overtones, set both this and Size high and the pedal can run away and self oscillate. Level is the overall volume of the effect relative to your original signal. The Dark/Bright toggle sets the overall voice. Holding down the Havoc temporary footswitch can create extended, seemingly infinite holds, gradual runaways or instant collapse, depending on the Size setting. Releasing it will return the effect to the level of the Regeneration control.