low pass filter || subwoofer circuit diagram || animation

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please support my channel and like the videos for upcomming videos, either i will not be able to make more videos
its become about to 2 years, but my channel is not able to collect sufficient views.
its does make effect on my mind, some times i can't focus on circuits. it could we happen that you will get the videos few and fewer.
sorry for inconvenience ............
regards
s.p. singh
speacial thanks to ‪@AmplifierWorld‬