47+ Benson Preamp Pedal Schematic Background. The preamp was designed to operate in as many. It's essentially a modified wampler plexidrive with an added bass control.

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Fulltone ocd obsessive compulsive drive overdrive pedal. Some schematics on the internet have mistakes. It's essentially a modified wampler plexidrive with an added bass control.

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Just a couple of little preamps that have been requested. It turned out far better than i expected'. Does the second opamp still need to be altered to what was suggested? Some may be completely wrong.