The principle of the BBE high-resolution sound processor is to output the high-, medium-, and low-frequency signals of the signal source through a high-pass filter, a band-pass filter, and a low-pass filter, and then control their gains and then mix them to highlight the medium-high signal source 3. The information content of low-frequency signals achieves the effect of extending frequency response and clarity. The operational amplifier BBE processor circuit is shown in the figure. The input signal is buffered and amplified by the operational amplifier IC1-1, part of which intercepts the high-frequency signal through the high-pass filter, and partly intercepts the low-frequency signal through the low-pass filter. The separated high and low frequency signals are amplified and controlled by IC2-2 and IC2-1 Its magnification is mixed with the unprocessed signal and output in the adder to achieve the effect of enhancing high-frequency and low-frequency signals and beautifying the sound.
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