Powering down the Amp, dangerous for headphone ? (Bravo Audio V2 Tube Amp)

That's interesting. I always power down my amp while my headphones are plugged in, but nothing has ever gone wrong.

I like to leave mine plugged in so it doesnt wear the socket..........

I always heard that you're supposed to always have headphones plugged into the jack of a tube amp when its turned on, because it can damage the circuitry. Perhaps somebody else can elaborate on this as I don't know the full reason

The key thing to do is to turn the volume control right down before powering up/down, or when inserting/removing the headphones.

Then there is no harm at all in leaving the headphones in all the time.

All I do is turn the volume to the lowest setting whenever I power them down/up or switch cans. Imagine if it's the same with speakers and you have to undo the screw terminals on the back of the amp or the speaker cabinets everytime; or worse, try doing that in a car where the amp is probably behind a board precisely to cover up the terminals for "aesthetic neatness."

excessive DC Offset is the main danger. this is what causes the 'thump' when an amp is turned on or off.

if a circuit is prone to wide swings, it will be recommended to keep headphones unplugged when powering the amp on and off.

protection circuits, or relays, are often used in such situations. these are designed to basically keep the headphones disconnected for a few seconds after the amp is powered up, even though plugged in.

it's not really a big concern for the vast majority. i've only ever heard of this being an issue with some DIY amps, and even then mostly in the prototyping stage.