The Ojo Diablo! is a versatile low to medium gain overdrive with an exceptionally dynamic response. It preserves the character of your instruments and is very sensitive to your playing technique. The pedal features six external potentiometers and six internal trimmers, as well as a headroom toggle, allowing for a wide range of tonal possibilities. The external controls include Feed, Body, Tone, Gain, Level, and Level+. The Feed control adjusts the amount of bass in the input signal for a tight and transparent sound. The Body control takes effect on lower mids and compression, allowing for a range of sounds from tight and open to fat and singing. The Tone control sets the tone preferences from dark to bright, and can be further fine-tuned with the internal trim pots. The Gain control sets the intensity of distortion, and the Level and Level+ controls set the overall volume level and the second gain settings, respectively. The Headroom Switch activates the internal Voltage doubler. The internal controls include Presence, Bass, TRIM1, Tone+, Bass+, and Gain+. The Presence control affects the high frequencies of the main section, while the Bass control affects the lower mids and bass frequencies. TRIM1 is a 100r resistor that regulates the gain of Q3. Tone+ and Bass+ set the tone and bass response of the second section, and Gain+ allows for fine-tuning of the second section gain. With its wide range of controls, the Ojo Diablo! is one of the most complete and versatile overdrives available.

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