neoufo51, I feel exactly the same way
I've had my C700's for a while and I've been content with them this whole time, but today they JUST crapped out on me, exactly where that stress relief is. My right headphone is dead unless I push in where the stress relief is. I've already tested this on different sources and with another pair of headphones to make sure it is indeed the C700's, which it is :|
I will be calling Denon customer service tomorrow when it's open.
I seem to have fairly bad luck when it comes to getting lemons.