J l uses for 1 year
minimum: comfort (after 30 minutes, you'll hurt your ears)
Most: its return (1035 kHz)
j for 2 years had an HD of 200 seinheisser and I advise you not that that's because it really is not robust: the kam '!
report quality / price honnte
with the experience I m directed rather towards an AKG or a good lil sony or even the high end of seinheisser