Audio Signal is first filtered to remove the high-frequency signals and allow only the low-frequency signals to pass through it. This low-frequency signal is then amplified using a voltage amplifier.  This low power signal is then 100W Subwoofer Amplifier using a transistor-driven class AB power amplifier.

100W Subwoofer Amplifier

Applications of Subwoofer Amplifier Circuit:

1. This circuit can be used at home theatre systems to drive subwoofers to produce high-quality, high bass music.
2. This circuit can also be used as a power amplifier for low-frequency signals.

Limitations of the Circuit:

1. The filter circuit tends to increase the DC level of the audio signal, causing a disruption in the biasing.
2. The use of linear devices causes power dissipation, thus reducing the efficiency of the circuit.
3. It is a theoretical circuit and the output contains distortion.
4. The circuit doesn’t provide any provision to remove the noise signal and thus the output may contain the noisy disturbance.

Purchase Links:

HD Audio Rush DTS / AC3 5.1 Channel https://amzn.to/3gNHGrS

B-TECH Audio BASS Treble and Tone Control Board. https://amzn.to/3oK80HJ

B-Tech Audio 5.1 Prologic Board. https://amzn.to/362TSTh

Audio Amplifier Cabinet. https://amzn.to/3gJIWfB