Schematic DIY KitBandpass Analog filter circuit
If you want to further process only a certain frequency range, one generally uses a so-called band-pass. It usually consists of a combination of a high-pass filter and a low-pass filter so that only a certain range = (band) is durchgelasssen of frequencies. Example is here, for instance, a crossover network for speakers, in the midrange abbekommt only 'average' frequencies. Here Links and information with appropriate schematics

Here you will find Schematic Circuit Diagram for DIY and further information on Bandpass
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