double high pass filter at the end of the Professor Tweed

[mordechai]

right before the volume control, there is a 10K resistor followed by a 2n2 cap to ground, followed by another 10K resistor followed by a 2n2 cap to ground.  Is this just an example of a high pass filter being refined and re-filtered by the second round of identical components?  What is the benefit of this as opposed to just using a single resistor/cap scenario with different values?

[Seljer]

Two first order filters become a second order filter (sort of, there are issues with impedances interacting and such so the cutoff frequency isn't exact). The rolloff is steeper, instead of 6dB per octave its 12dB per octave.

[Gus]

right before the volume control, there is a 10K resistor followed by a 2n2 cap to ground, followed by another 10K resistor followed by a 2n2 cap to ground.  Is this just an example of a high pass filter being refined and re-filtered by the second round of identical components?  What is the benefit of this as opposed to just using a single resistor/cap scenario with different values?

That is a low pass filter you are describing

[mordechai]

Yes, that's what I meant.  Apologies...