Brilliance 6: 3-Voice Fuzz + 3-Band Tone PUBLIC

3-Voice Fuzz Circuit with 3-Band Tone and Treble Boost

3-voice fuzz circuit with 3-band tone and treble boost. Controls Include: Drive, Gain 1, Treble Boost, Gain 2, Fuzz 1 enable switch, Fuzz 1 symmetry switches, Fuzz 2 enable switch, Fuzz 3 enable switch, Fuzz 3 symmetry switches, Bass, Center, Treble, Output Gain, and Volume. The fuzz voices refer to three diode arrays; one feedback-type (with LEDs) and in-line (with Schottky diodes), and one shunt-type (with standard silicon diodes). Frequency Range with all controls at 50% is from 40 Hz to 8 kHz. Suitable for 6/7-string guitar or 4-string bass. Example Gains per Frequency with all controls at 50% and all Fuzz disabled are; +17 dBV @ 100 Hz, +33 dBV @ 400 Hz, +32 dBV @ 1 kHz, and +14 dBV @ 4 kHz. Bandwidth extends in both directions when controls are set > 50%. Example Gains per Frequency with Treble Boost 100%, all other controls at 50%, and all Fuzz disabled are; +40 dBV @ 400 Hz, 47 dBV @ 1 kHz, +26.4 dBV @ 25 kHz. Maximum possible gain is >= +70 dBV with all controls at 100%. Fuzz 2 reduces gain by 20 dBV, but Fuzz 1 and Fuzz 3 do not affect gain. The IC was chosen to ensure clean op-amp operation at all control settings. If overdriven op-amp distortion is desired, in addition to diode clipping, keep IC1 as is and substitute one of the following for IC2. JFET distortion, TL082CP. MOSFET distortion, OPA2156IDR. Tube-like BJT distortion, NJM5532M. [Note: Substitutions will result in higher op-amp noise.] Power-supply not shown. Requires a regulated dual-polarity DC supply providing +-9VDC or +-12VDC or +-15VDC at >= 40 mA of current. [Note: Higher supply voltage results in lower op-amp noise.] And though simulator verified, treat the circuit as experimental. Breadboard test before committing to a soldered build.