diy speaker protection circuit

diy speaker protection circuit:

diy speaker protection circuit for the soundbox. Every amplifier needs this circuit. This diagram protects the speaker from unwanted voltage from the audio amplifier. Sometimes the amplifier burned and the voltage come out directly from the speaker output. this board has a relay to protect. If this board gets DC voltage to the input, then it can’t switch on the relay. 

This board run with 12 Dc voltage. it’s a stereo diagram. it has 2 audio input and 2 output. but the speaker ground voltage must need to this circut. 12 volt gorund and speaker output ground must be together. other wise it’s can’t work properly. and must connect the sound to the sp input and take the sound from the Sp Output to the speaker. 

The corcuit diagram 

2sc5200 and  2sa1943 transistors details

This is the 2sc5200 and 2sa1943 transistors details. These are the best transistors for the audio amplifier circuit diagram. maximum amplifier circuit used this pair of transistors. 

2sc5200 and 2sa1943 transistors details

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