Headphones damage due to excessive volume?

[Nadek]

Took my dog for a walk, came back to my room and I see my brother watching some random prank complication, with music in background.
Basically the headphones were on the table, volume maxed out and I could clearly hear the detailed audio coming out of my headphones as if they were a speaker. Obviously there were not on his ears, he really did not need to put them on to hear everything.
This has been going on for atleast 20 mintues. So the headphones were connected to the PC directly playing very loud.

This is the equipment: Meze 99C, the soundcard on the PC is Creative Soundblaster Audigy FX (it has 300ohm amplification)

Did I damage the headphones?
I know listening to them can tell better, but I am sure that if I dig in enough I will find the "flaws".
Just want to know whether the possible, and hear the truth... because ears can lie sometimes. How can I figure out damage better?
Thanks in advance.

 

[phthora]

Took my dog for a walk, came back to my room and I see my brother watching some random prank complication, with music in background.
Basically the headphones were on the table, volume maxed out and I could clearly hear the detailed audio coming out of my headphones as if they were a speaker. Obviously there were not on his ears, he really did not need to put them on to hear everything.
This has been going on for atleast 20 mintues. So the headphones were connected to the PC directly playing very loud.

This is the equipment: Meze 99C, the soundcard on the PC is Creative Soundblaster Audigy FX (it has 300ohm amplification)

Did I damage the headphones?
I know listening to them can tell better, but I am sure that if I dig in enough I will find the "flaws".
Just want to know whether the possible, and hear the truth... because ears can lie sometimes. How can I figure out damage better?
Thanks in advance.

I don't understand what "300 ohms of power" means. Ohms are a unit of resistance, not output. In every other case, the output of the amp is listed in watts, volts, or amps, though most of the time, just watts. But Creative lists "ohms of power," which I suppose means that they can power 600 ohm headphones. Whatever they're trying to convey, it's not super helpful.

Per the specs, your headphones have a maximum power handling capacity of 50mW (which is likely a conservative number), which means that if your amp was outputting more power than that, they may have been damaged. The good news is that the amp has been measured by a third party, and their measurements confirm that 48.52mW into 24.5 ohms is the max output before clipping. It's unlikely that he was listening to them that high even, since the max power into 32 ohms would be lower than that and usually a clipping amp is literally unlistenable. I would wager that the headphones are totally fine.

However, he was a jerk and you should absolutely tell him they are damaged.