For those of you fans of audio and like the brain power amplifier especially bass fans, you should try this low pass filter circuit. The circuit is designed to the minimum but still with a low-pitched sound output quality was very good.
Using NE5532's Op-Amp circuit enables excellent sound quality for its output, and also uses a single + 15V DC power supply making the Low Pass Filter circuit very easy and simple to use. You can install this LPF circuit before the incoming sound signal to the amplifier. Here is the circuit of NE5532 15VDC Low Pass Filter:
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