In market most of the available sub filter boards are working on 12V dual power supply. If you want to build a small subwoofer amplifier which is operated in single power supply or 12V battery connection you need a single power supply based Low Pass Filter for Subwoofer. This article shares the sub filter using LM324 IC with its circuit diagram.
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Low Pass Filter for Subwoofer Circuit Diagram
Components Required
| Sl. No | Component Type | Value / Specification | Quantity |
|---|---|---|---|
| 1 | IC | LM324 | 1 |
| 2 | Resistor | 47K | 2 |
| 3 | Resistor | 100K | 6 |
| 4 | Resistor | 6.8K (6K8) | 6 |
| 5 | Resistor | 4.7K (4K7) | 2 |
| 6 | Resistor | 470Ω | 1 |
| 7 | Capacitor (Electrolytic) | 47µF | 3 |
| 8 | Capacitor (Electrolytic) | 22µF | 1 |
| 9 | Capacitor (Electrolytic) | 100µF | 1 |
| 10 | Capacitor (Ceramic) | 100nF | 3 |
| 11 | Capacitor (Ceramic) | 22nF | 1 |
| 12 | Terminal Block | Input (IN, GND) | 1 |
| 13 | Terminal Block | Output (OUT) | 1 |
| 14 | Terminal Block | Power (12V+, GND) | 1 |
