[Leee]

 
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This is a first..
 

Not really, as Azathoth mentioned earlier.....
Quote:

Originally Posted by Azathoth
 
Comfort and clamping force are about equal between the two, though the M50 will have more isolation because it's circumaural.

 
 
Honestly based on my current experience I'm not sure where this idea of hd25's isolation being as good as some IEMs and closed cans came up. I'd say the hd25 has great attentuation due to the crisp sound signature, but this is not isolation/passive noise cancelling.