Well, since webshops have been seling fakes of 20 dollar fiio e5/e6 amps, i'm not suprised with anything anymore. ;)
from what i've read, clamping is not that harsh on these as on some sennheisers. As a matter of fact, i've read that some people wish they would clamp some more for better bass.. :) Guess it also somewhat depend on the pads you're going to use.
As i stated, it's what i've read, since mine still aren't in. :P Waiting sucks.