Speaker Protection Circuit Circuit

Posted on Jun 5, 2012

A speaker system can be protected against amplifier failure when dc voltages (on speaker line a-b) arc sensed by the circuit. Either positive or negative dc voltages are sensed. A relay opens in this case, removing the dc from the speakers.

Speaker Protection Circuit Circuit
Click here to download the full size of the above Circuit.

About 12 V at 50 mA is needed to power the circuit, depending on the relay.

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