Fuzz Maniac I Circuit PUBLIC

2-Voice Shunt-Type Diode-Fuzz Circuit with 3-Band Tone

RS-Timbre "Fuzz Maniac I" original guitar fuzz circuit featuring two gain stages, two fuzz voices, and a modified Fender-style 3-band tone-stack. Controls Include: Attenuation 1, Input Gain, Fuzz enable switch, Fuzz Type switch (Deep or Normal), Fuzz symmetry switches (four, with 2 settings each), Fuzz Depth, Attenuation 2, Output Gain, High Trim, Low Trim, Bass, Mid, Treble, and Volume. Range above 0 dBV is from 40 Hz to 25 kHz, with emphasis between 250 Hz and 1 kHz. Low -3 dB corner is at 30 Hz. High -3 dB corner is at 30 kHz. Caution! High-gain circuit. Maximum gain = +28 dBV @ 1 kHz with all controls at 50%, or +44.3 dBV with all controls at 100%. Suitable for 6/7/8-string guitar or 4/5/6-string bass. With fuzz off, the circuit is a high-gain Overdrive. The specified IC was chosen to provide MOSFET distortion when overdriven. For clean operation without fuzz, substitute an OPA2134PA, or for vintage-sound tube-like distortion, substitute an NJM5532M. Power-supply not shown. Requires a regulated dual-polarity DC supply providing +-9VDC or +-12VDC or +-15VDC at >= 20 mA of current. And though simulator verified, treat the circuit as experimental. Breadboard test it before committing to a soldered build.