Headphone Heights

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Amp fried headphones - DC into the output - questions

Posted by robertd on February 9, 2016 at 17:09:33:
So I have some nice headphones and what has been a very nice sounding amp.

Today the left speaker of the headphones was really warm, the sound was low and distorted. Called the place where I bought them, they suggested letting them cool and trying again. This time no sound, heating up, electrical burning smell. Turn off amp, take them out, contact the manufacturer.

They suspect DC got into the output, fried the headphone, and they say this is a risk with any solid state headphone amp that's not DC coupled. I've never heard this before, but I have to say I don't give any attention to technical aspects of headphones, or much of anything technical related to high end audio for that matter.

So anyway, my question is, was the manufacturer correct that any solid state amp not DC coupled runs the risk of frying your amp like this?

If so, could I have a bit more of an explanation and also are there any steps to prevent it?

Thanks!

Robert