Simple Speaker Protection for Power Amplifier with Balanced Outputs

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Hi Patrick

I have been looking for circuit like this for my up-coming balanced power amplifier project. My first time to build a balanced power amplifier. This circuit is good for my need. Very interesting.
One question for you, what is the difference between Amp Out+ and Speaker+? I am going to build the Version 2 speaker protection circuit.

Please advice.
 
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