Electronics Help Care electronics circuit diagram
Subwoofer amplifier circuit 2.1:
This is a Subwoofer amplifier circuit 2.1. It has 2 channels, the left channel and the right channel. This is surrounded by mid-range and full-range. And 1 channel output is for the subwoofer. low-frequency. stereo input and 3 outputs. This circuit requires a 12V, 0V, 12V AC voltage.
This diagram is only for the pre-amplifier. We need an amplifier circuit to make this audio amplifier. We have to use 3 amplifiers. 2 amplifiers for the surround speakers (left and right). and another amplifier for the Subwoofer. We can use any type of amplifier to make this 2.1 sound system.
This surround section also has bass, treble, and midrange. And the subwoofer section has subwoofer volume and frequency control.
amp circuit board:
Amp circuit board using 2SC5200 and 2SA1943 transistors. It’s a mono audio amplifier circuit diagram. For stereo, we need to use a dual-board setup. here needs 35-0-35 voltage. positive, negative, and ground voltage. We can get a maximum of 100 watts of output.
This is the Speaker protection circuit diagram. It can protect our Speaker from the burn. If the amplifier has any problems, this circuit can save our soundbox. Normally, when the transistor makes a short circuit, the voltage comes out from the speaker output line, and this circuit protects that voltage. This circuit should not allow direct voltage to be sent to the speaker. This circuit is essential for protecting the speaker.
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