Clean 2-Stage Overdrive PUBLIC

Clean 2-Stage Overdrive for 6-String Guitar

Clean 2-stage overdrive circuit for 6-string guitar. Maximum possible gain of +35 dBV @ 1 kHz with all controls at 100%. Controls Include: Input Level, Gain, and Volume. No tone-controls. Frequency Range at >= unity-gain is 40 Hz to 15 kHz with all controls at 50%, but which extends in both directions with all controls > 50%. Suitable only for 6/7-string guitar. Can be used for stomp-box or rackmount projects. Power-supply not shown. Requires 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 before soldering. If overdriven op-amp distortion is desired, consider the following substitutions for the IC. For good JFET distortion, use a TL082CP. For MOSFET distortion, us an OPA2156IDR. For the most tube-like distortion from any op-amp IC, use an NJM55332M, the Japanese version of the NE5532N (but do not use the NE5532, as it does not sound the same). In all three of these cases, audible noise may become an issue. Perform listening tests while breadboarding with these substitutions to determine if noise is a mitigating factor.