11+ Subwoofer Filter Circuit Using Lm324. Top 5 lm324 ic diy electronics projects, 5 awesome electronics circuit. This is a dual mic (left/right) input sound sensor.
The lm324 has plenty of gain past 20khz. So, if you are interested in experimenting with audio circuits in subwoofer range, this circuit is for you. The gain of first stage can be adjusted using pot r3.the output of the first stage is connected to the input of second stage sir i built both 100 watt subwoofer amplifier and subwoofer filter but nothing works.