Is there a difference between a high pass filter with an op amp and a high pass filter without one?

I'm trying to modify a guitar effects pedal of mine to remove some squeaking and decided that a highpass/low pass combo with some potentiometers to modify the highpass and low pass points (since my pedal emits squeaking at different frequencies on different settings) and I was wondering if I should use a high/low pass with an op amp, capacitors, and resistors - or just a simple resistor and capacitor filter. Does anyone know if either configuration is a detriment to sound quality?


Its difficult to make a filter as flexible or as sharp as an ACTIVE filter.

Use decent op-amps and there is no degradation of the sound, if the thing's driven properly.

It sounds like you need to look for "parametric filter" designs.

Steve
iceng5 years ago
They are basically the same except you can not easily add pots to a straight high-pass, 
However you can with an Op-Amp because that has gain.
And there is no signal loss when using an Op-Amp, even with pots.

Walter Jung has a very good book on filters if you go to Amazon,

A.