These are very light weight however come out of the box with extreme clamping force. I recommend bending the metal of the frame a bit very gently around the top center till the force is reduced. the sound was very detailed at first but seems to have calmed down and become more flat after extended use.
The earpads are attached with velcro pads. Very cool, however they are not all that durable after a few months the glue holding the p.u. leather to the velcro frame that conceals the foam has started to come undone (see photo).
Often times I notice a strange resonant or humming sound, I believe this may be the headphones picking up stray E.M. from the washer or drier in the next room. Usually with a less sensitive pair on this sound is muffled enough that I can not perceive it even though they are also open back(akg 7xx, akg 240mkii).
Overall I am happy for the price and was thoroughly surprised by the difference in audio delivered by planar 75%
p.s. please sell replacement earpads