welcome to another interesting topic of Audio amplifiers. let’s discuss The subwoofer amplifier low pass filter board. This board has to be made with 5 preset adjustments, The 4 presets represent the frequency adjustment, and one preset for the Gain adjustment. This board can easily drive High-power subwoofer amplifier boards. Providing output with high quality and not allowing any vocal to the output stage, Means the pure bass frequency range from 40 Hz to 120 Hz will be delivered.
Low pass filter board circuit diagram
