I would like to add a A50k potentiometer to control the volume of an audio input for a small amplifier. Additionally, I used some easy passive filtering to remove the lowest frequencies and some highs from the signal.
This is the schematic:
I understand that a potentiometer before the filter will alter the cutoff frequency of the lowpass filter. Adding the potentiometer behind the filter did not have any noticable effect.
Is it safe to assume that a potentiometer after the filter will not alter the frequency response significantly? The used Amplifier is a small PAM8403 board (see here). There is a 10k resistor at the input but I couldnt find any other information about the input impedance of the amplifier.