This is a subwoofer circuit diagram.It also call low pass filter. for making subwoofer we have to use this circui… | Circuit diagram, Subwoofer, Subwoofer amplifier
How To Connect A Subwoofer To A Receiver Without Subwoofer Outputs
Preamplifier - an overview | ScienceDirect Topics
A1 preamp 2.1 sound line stereo based on the subwoofer crossover signal output | eBay