Equaliser circuits typically divide the audio spectrum into separate frequency bands and have independent gain control for each band. The output of each band is mixed at IC4(A) and then fed to an audio power amplifier. Proper quality factor (Q) needs to be selected to avoid overlap in adjacent bands as this introduce colouration into… Read More »
The following is an electronic circuit called galaxy audio booster which serves to improve the performance of your audio system. This circuit uses an IC RC4558 in which there are two op-amp modules that can be used for stereo audio applications. The circuit is similar to stereo tone booster that uses the principle of High… Read More »
This is an audio bandpass filter circuit which will filtering the audio frequency from 300Hz to 2500Hz.. The lower and higher audio frequency will be cut off. Download the explanation here
Building a passive crossover for a speaker involves designing a network of passive electrical components (resistors, capacitors, and inductors) that split an audio signal into different frequency ranges and direct those ranges to the appropriate drivers (such as woofers, midrange speakers, and tweeters) in a multi-driver speaker system.. Here the simple passive schematic diagram of… Read More »