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I think there is something a bit backwards here...

If an amp is DC coupled (meaning it has no output coupling capacitor) you run the risk of a possible failure in the amp's output stage and DC being applied to the output. And you can get what you have experienced.

What a manufacturer is trying to accomplish by making it DC coupled is they want to avoid coupling capacitors, especially at the output. The reason for this is that all capacitors have a "sound" and to make the amp as transparent and neutral as possible they make it DC coupled.

When you read an amp is DC coupled throughout, they are saying there are no coupling capacitors anywhere in the circuit. This is a wanted feature but if the amp is DC coupled it must also have some sort of protection circuitry to avoid what happened to you.

The protection circuit that I mentioned should have monitored that there was DC in the output and shut down the amp to prevent the damage.

I would contact the amp's manufacturer and ask what happened.

Ed

We don't shush around here!
Life is analog...digital is just samples thereof


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