how to make subwoofer circuit

how to make a subwoofer circuit. 

how to make a subwoofer circuit. for the subwoofer, we can use this pre-amplifier. the low pass filter only allows low-frequency signals from 0Hz to its cut-off frequency. this is the diagram.

Here we can see its momo low pass filter. using stereo sound and out mono. because normally we use one sub for the home sound system. we can make a 2.1 or 5.1 home theater sound system. for 2.1 we have to use 2 surround amplifiers and one low pass amplifier. and for 5.1 we have to use 4 surround amplifiers and one low pass filter. 

Let’s go to watch the video of this circuit 

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