[sygyzy]

I've been using my HD-668B's for a few months and just yesterday, I noticed that both bands have a crack on the top. Has anyone seen anything like this?
 
 

 

[vodkex]

It's nothing to worry about. There's a solid metal rod inside that plastic "cover", so it won't stop working or break completely.
 
It happened to my first SR850 (the same headphone by samson), I flexed the headband too much since the pressure on my head was unbearable, and the plastic broke just like yours. 

 

[sygyzy]

I know it still works normally but it's kind of lame that they would build such a cheap (quality) headphone. I mean, I guess that's what you get when the headphone is inexpensive.

 

[vodkex]

I find it strange that such a thing happened with normal use... I mean, you didn't over-flex these rods, right? Then yeah, it's kind of lame...

 

[Supertoaster]

. I had a pair of 681's (nearly identical design of the samson) and the clamping pressure was really bad and I bent the rods but I never got a single crack in them.
 
And hey they are $50 and built pretty good for that price. At least they aren't falling apart