Got this headphone from a friend after he got himself a more "comfortable" one (only 3 months after this Denon).   Trying it for 10 minutes was enough to understand the problem: the headband is way too curved, pushing the earpads extremely hard on the head. My skull isn't really above average and it was starting to give me some headache. So I brought it on my workshop table.   Note: The headache and hinges breaking-off issues only showing among certain users, I suspect Denon had production issues on certain factories or during a specific period...