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Both of these responses make sense to me, but I guess my question is, if I go with just swapping the wipers that are connected to output (for instance) will the amount of interaction render the two volume pots effectively unusable? I planned to mostly set and forget this pedal, and the second...

I'm building a Mach One overdrive and had a thought. I would like to toggle between two volume pots at the end of the circuit to achieve two different output volume "settings." This is what the output section looks like, pretty simple: Could swapping between two pots be achieved with an SPDT...

Thank you guys for your responses, this has been super educational for me! The Zener diode is interesting, I'll do some more research on that. For now I've decided to just run both circuits at 18v. I knew the OPA2134 was a "high quality" / unlikely-to-clip opamp, but the info about the amount of...

I am planning to build a two-in-one overdrive that runs on an 18v power supply. One circuit is designed to run at 18v, and the other *can* run either 9v or 18v. The circuits I'm using are the Mach 1 (9v or 18v) and the Super '64 (typically a 9v in and a charge pump boosting it to 18v internally...