Hello, I'm new to electronic stuff and I'm wondering what is the use of a capacitor between the inverting amplifier and the band pass filters in a baxandall circuit?
The Baxandall filter is a dual adjustable RC filter - with the capacitors acting as part of the frequency control. The cap in between the inverting amp and the filters isn't actually part of the Baxandall circuit - it is used to block DC from the tube plate (or transistor collector / emitter) from getting into the filter circuit - while allowing the signal to pass through it.
