Electronics Help Care Amplifier circuit diagram
2.1 Circuit diagram using TDA8947J:
This is the 2.1 circuit diagram using TDA8947J. This amplifier circuit has 3 audio inputs and 3 audio outputs. One can make 50 watts, and the other 2 are 25+25 watts. We can make one subwoofer and two surrounds. But we must use a low-pass filter circuit board to make a subwoofer. The surround input will be direct, and the subwoofer input will be using this lowpass filter. This circuit runs with 9 volts to 26 volts.
The low-pass filter for the subwoofer
This is the low-pass filter for the subwoofer amplifier. This circuit needs to make a bass amplifier. We also need to make a 2.1,5.1 audio sound system. This board makes only bass. makes only the low part. It has no mid-range or high part. It’s also a pre-amplifier. It’s output mono. Input stereo but output mono. This board runs on 9 volts to 15 volts. It needs a single voltage. For this, we can use this board in a car amplifier.
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