Bass Fuzz Circuit with Compression PUBLIC

Bass Fuzz Circuit with Compression

Bass fuzz circuit with compressor and single-knob 2-way tone-control. Uses two dual FET-input op-amps for gain, one BJT transistor and one FET for compression, and eight Schottky diodes for fuzz. Controls Include: Input Gain, Fuzz enable switch, Fuzz Symmetry Switches (two, with 2 settings each), Fuzz Depth, Compression control, Tone control (bass left, full-range middle, treble right), Output Gain, and Volume. Frequency range above 0 dBV is from 31 Hz to 850 Hz. Suitable for 4/5/6-string bass (not good for 6/7/8-strinig guitars due to restricted high-end). With all controls at 50%, the low 0 dB reference is at 30 Hz with the low -3 dB reference is at 28 Hz, while the high 0 dB reference is at 853 Hz with the high -3 dB reference at 1 kHz, above which total gain drops dramatically, going to -20 dB at 2.5 kHz, with higher frequencies inaudible. With all three Gain controls and the Volume controls at 100%, but other controls at 50%, total gain reaches +50 dBV @ 63 Hz, with expanded bandwidth: from 17 Hz to 3.4 kHz. Power-supply not shown. Requires regulated dual-polarity supply providing +-9VDC @ >= 25 mA of current. Though simulator verified, treat circuit as experimental. Breadboard test before committing to a soldered build.