I'm looking for a front end pre-amp for a guitar and wondered if the application: "Tone Stack forGuitar Amplifier"s first op-amp section would do the trick without the second op-amp which involves the filtering. Possibly follow the first op-amps output with a 10uF cap. and resistor to ground then on to my main amplifier section.

Also, what is the designation of that last resistor with the abbreviation "DNP"?

-Keith